Podcast
Questions and Answers
Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True (A)
Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
False (B)
In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance.
In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance.
True (A)
Information theory provides a fundamental characterization of coded performance and suggests new ways to communicate over the wireless channel.
Information theory provides a fundamental characterization of coded performance and suggests new ways to communicate over the wireless channel.
The capacity of an AWGN channel is limited by power and bandwidth.
The capacity of an AWGN channel is limited by power and bandwidth.
Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
A slow fading channel has a higher capacity than a fast fading channel.
A slow fading channel has a higher capacity than a fast fading channel.
Transmit diversity is more effective than receive diversity in a fast fading channel.
Transmit diversity is more effective than receive diversity in a fast fading channel.
Repetition is a form of time diversity.
Repetition is a form of time diversity.
A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel.
A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel.
True or false: Wireless channels can be modeled as linear time-varying systems.
True or false: Wireless channels can be modeled as linear time-varying systems.
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap.
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap.
True or false: The Rician model includes only scattered paths.
True or false: The Rician model includes only scattered paths.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: Diversity can be provided across time, frequency, and space to increase reliability in communication over a flat fading channel.
True or false: Diversity can be provided across time, frequency, and space to increase reliability in communication over a flat fading channel.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Repetition coding fully exploits the degrees of freedom in the channel.
True or false: Repetition coding fully exploits the degrees of freedom in the channel.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
The goal of the course is to study the fundamentals as well as the new research developments in wireless communication.
The goal of the course is to study the fundamentals as well as the new research developments in wireless communication.
The concepts in the course are illustrated using examples from several modern wireless systems.
The concepts in the course are illustrated using examples from several modern wireless systems.
The course covers topics such as diversity, capacity of wireless channels, and MIMO.
The course covers topics such as diversity, capacity of wireless channels, and MIMO.
The course does not include any information about wireless networks.
The course does not include any information about wireless networks.
Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
Small-scale fading in wireless communication is mainly caused by variations in carrier frequency.
Small-scale fading in wireless communication is mainly caused by variations in carrier frequency.
The time constants associated with large-scale fading are usually very short.
The time constants associated with large-scale fading are usually very short.
Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier wavelength.
The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier wavelength.
The course covers topics such as opportunistic communication and multiuser diversity.
The course covers topics such as opportunistic communication and multiuser diversity.
True or false: Wireless communication typically happens at very low carrier frequency.
True or false: Wireless communication typically happens at very low carrier frequency.
True or false: Large-scale fading is more important for communication system design than for cell site planning.
True or false: Large-scale fading is more important for communication system design than for cell site planning.
True or false: Small-scale fading in wireless communication is mainly caused by variations in the carrier wavelength.
True or false: Small-scale fading in wireless communication is mainly caused by variations in the carrier wavelength.
True or false: The time constants associated with large-scale fading are very short.
True or false: The time constants associated with large-scale fading are very short.
True or false: Fading occurs when there is destructive interference of the multipaths that contribute to a tap.
True or false: Fading occurs when there is destructive interference of the multipaths that contribute to a tap.
True or false: Wireless channels can be modeled as linear time-invariant systems.
True or false: Wireless channels can be modeled as linear time-invariant systems.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Transmit diversity is more effective than receive diversity in a slow fading channel.
True or false: Transmit diversity is more effective than receive diversity in a slow fading channel.
True or false: The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier frequency.
True or false: The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier frequency.
True or false: Maximum likelihood sequence detection achieves full diversity in the absence of channel uncertainty.
True or false: Maximum likelihood sequence detection achieves full diversity in the absence of channel uncertainty.
True or false: Wireless channels can be modeled as linear time-varying systems?
True or false: Wireless channels can be modeled as linear time-varying systems?
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods?
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods?
True or false: Space-time codes transmit the same symbol simultaneously at the antennas?
True or false: Space-time codes transmit the same symbol simultaneously at the antennas?
True or false: Cooperative diversity involves users exchanging information to increase diversity?
True or false: Cooperative diversity involves users exchanging information to increase diversity?
True or false: Repetition is a form of time diversity?
True or false: Repetition is a form of time diversity?
True or false: Diversity can be provided across time, frequency, and space to increase reliability in communication over a flat fading channel?
True or false: Diversity can be provided across time, frequency, and space to increase reliability in communication over a flat fading channel?
True or false: The Rician model includes only scattered paths?
True or false: The Rician model includes only scattered paths?
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap?
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap?
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol?
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol?
True or false: A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel?
True or false: A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel?
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
True or false: A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel.
True or false: A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: The capacity of an AWGN channel is limited by power and bandwidth.
True or false: The capacity of an AWGN channel is limited by power and bandwidth.
True or false: A slow fading channel has a higher capacity than a fast fading channel.
True or false: A slow fading channel has a higher capacity than a fast fading channel.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: Wireless channels can be modeled as linear time-varying systems.
True or false: Wireless channels can be modeled as linear time-varying systems.
True or false: The Rician model includes only scattered paths.
True or false: The Rician model includes only scattered paths.
True or false: Rayleigh flat fading model is based on many small scattered paths.
True or false: Rayleigh flat fading model is based on many small scattered paths.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: Wireless channels can be modeled as linear time-varying systems.
True or false: Wireless channels can be modeled as linear time-varying systems.
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap.
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: Wireless communication typically happens at very high carrier frequency.
True or false: Wireless communication typically happens at very high carrier frequency.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap.
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap.
True or false: The time constants associated with large-scale fading are very long as the mobile moves, many seconds or minutes.
True or false: The time constants associated with large-scale fading are very long as the mobile moves, many seconds or minutes.
True or false: The course covers topics such as opportunistic communication and multiuser diversity.
True or false: The course covers topics such as opportunistic communication and multiuser diversity.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier wavelength.
True or false: The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier wavelength.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: The course covers topics such as diversity, capacity of wireless channels, and MIMO.
True or false: The course covers topics such as diversity, capacity of wireless channels, and MIMO.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel.
True or false: A fast fading channel with full channel state information (CSI) has a lower capacity than an AWGN channel.
True or false: Small-scale fading in wireless communication is mainly caused by variations in the carrier wavelength.
True or false: Small-scale fading in wireless communication is mainly caused by variations in the carrier wavelength.
True or false: The capacity of an AWGN channel is limited by power and bandwidth.
True or false: The capacity of an AWGN channel is limited by power and bandwidth.
True or false: Diversity can be provided across time, frequency, and space to increase reliability in communication over a flat fading channel.
True or false: Diversity can be provided across time, frequency, and space to increase reliability in communication over a flat fading channel.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: Cooperative diversity involves users exchanging information to increase diversity.
True or false: In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance.
True or false: In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance.
True or false: Wireless communication typically happens at very low carrier frequency.
True or false: Wireless communication typically happens at very low carrier frequency.
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: The capacity of an AWGN channel is limited by power and bandwidth.
True or false: The capacity of an AWGN channel is limited by power and bandwidth.
True or false: The Rician model includes only scattered paths.
True or false: The Rician model includes only scattered paths.
True or false: The time constants associated with large-scale fading are very long as the mobile moves, many seconds or minutes.
True or false: The time constants associated with large-scale fading are very long as the mobile moves, many seconds or minutes.
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier frequency.
True or false: The channel in wireless communication only varies when the mobile device moves a distance of the order of the carrier frequency.
True or false: The Viterbi algorithm is used for maximum likelihood sequence detection.
True or false: The Viterbi algorithm is used for maximum likelihood sequence detection.
True or false: Full diversity can be achieved when performing maximum likelihood sequence detection using the Viterbi algorithm.
True or false: Full diversity can be achieved when performing maximum likelihood sequence detection using the Viterbi algorithm.
True or false: In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance.
True or false: In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels.
True or false: Information theory provides a fundamental characterization of coded performance.
True or false: Information theory provides a fundamental characterization of coded performance.
True or false: A fast fading channel with full channel state information (CSI) has a higher capacity than an AWGN channel.
True or false: A fast fading channel with full channel state information (CSI) has a higher capacity than an AWGN channel.
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Space-time codes transmit the same symbol simultaneously at the antennas.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: Wireless channels can be modeled as linear time-invariant systems.
True or false: Wireless channels can be modeled as linear time-invariant systems.
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM).
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process.
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty.
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves.
True or false: Small-scale fading in wireless communication is mainly caused by variations in carrier frequency.
True or false: Small-scale fading in wireless communication is mainly caused by variations in carrier frequency.
True or false: The time constants associated with large-scale fading are usually very short.
True or false: The time constants associated with large-scale fading are usually very short.
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM)?
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM)?
True or false: The Rician model includes only scattered paths?
True or false: The Rician model includes only scattered paths?
True or false: Wireless communication typically happens at very low carrier frequency?
True or false: Wireless communication typically happens at very low carrier frequency?
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap?
True or false: Fading occurs when there is constructive interference of the multipaths that contribute to a tap?
True or false: Cooperative diversity involves users exchanging information to increase diversity?
True or false: Cooperative diversity involves users exchanging information to increase diversity?
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process?
True or false: The Clarke's (or Jake's) model specifies the autocorrelation function and power spectral density of the fading process?
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels?
True or false: Waterfilling in the frequency domain is used in frequency-selective AWGN channels?
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves?
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves?
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods?
True or false: Time diversity can be obtained by interleaving and coding over symbols across different coherent time periods?
True or false: Repetition is a form of time diversity?
True or false: Repetition is a form of time diversity?
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM)?
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM)?
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel?
True or false: Repetition coding fully exploits the degrees of freedom in the wireless channel?
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty?
True or false: Maximum likelihood sequence detection achieves full diversity in the presence of channel uncertainty?
True or false: In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance?
True or false: In fast varying channels, tap gain measurement errors have a significant impact on diversity combining performance?
True or false: The goal of the course is to study the fundamentals as well as new research developments in wireless communication?
True or false: The goal of the course is to study the fundamentals as well as new research developments in wireless communication?
True or false: The concepts in the course are illustrated using examples from several modern wireless systems?
True or false: The concepts in the course are illustrated using examples from several modern wireless systems?
True or false: The capacity of an AWGN channel is limited by power and bandwidth?
True or false: The capacity of an AWGN channel is limited by power and bandwidth?
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions?
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions?
True or false: A slow fading channel has a higher capacity than a fast fading channel?
True or false: A slow fading channel has a higher capacity than a fast fading channel?
True or false: Space-time codes transmit the same symbol simultaneously at the antennas?
True or false: Space-time codes transmit the same symbol simultaneously at the antennas?
True or false: Small-scale fading in wireless communication typically happens at very high carrier frequency?
True or false: Small-scale fading in wireless communication typically happens at very high carrier frequency?
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions?
True or false: Large-scale fading refers to variations in the wireless channel due to reflections and obstructions?
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves?
True or false: Multipath fading in wireless communication is caused by constructive and destructive interference of the transmitted waves?
True or false: The capacity of an AWGN channel is limited by power and bandwidth?
True or false: The capacity of an AWGN channel is limited by power and bandwidth?
True or false: The Rician model includes only scattered paths?
True or false: The Rician model includes only scattered paths?
True or false: Wireless channels can be modeled as linear time-invariant systems?
True or false: Wireless channels can be modeled as linear time-invariant systems?
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol?
True or false: BPSK modulation uses only the I-phase, while QPSK delivers 2 bits per complex symbol?
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM)?
True or false: Frequency diversity approaches include time-domain equalization, direct-sequence spread spectrum, and orthogonal frequency-division multiplexing (OFDM)?
True or false: The Viterbi algorithm is used for maximum likelihood sequence detection?
True or false: The Viterbi algorithm is used for maximum likelihood sequence detection?
True or false: The Wireless Channel varies at two spatial scales: large scale fading and small scale fading?
True or false: The Wireless Channel varies at two spatial scales: large scale fading and small scale fading?
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