18 Questions
What is the main advantage of convolutional codes in noisy environments?
They offer good performance in noisy environments
What is a generator polynomial used for in communication systems?
To create the code transmitted over a communication channel
What does a rate of 1:2 mean in the context of convolutional codes?
For every input bit, the encoder produces two output bits
Why are convolutional codes well-suited for real-time communication systems?
Because of their efficient encoding and decoding algorithms
In GSM, what is the purpose of convolutional encoding at both the mobile device and base station?
To generate redundant encoded streams
What is the role of a Viterbi decoder in a communication system using convolutional codes?
To efficiently decode received data and correct errors
What is the purpose of Forward Error Control in Convolutional codes?
To transmit extra data for error recovery
How do convolutional codes differ from other error correction techniques?
By encoding data using a mathematical operation called convolution
What is the structure of a convolutional encoder?
Comprises shift registers and modulo-2 adders
Which parameter of convolutional codes represents the number of output bits?
n
What does the code rate (k/n) in convolutional codes measure?
Efficiency of the code
In convolutional codes, why is k often set to 1?
To simplify the encoding process
What is the code rate for the convolutional encoder with (n, k, m)=(2,1,3)?
1/2
In the context of convolutional coding, what is the purpose of the Viterbi algorithm?
To find the best path through the trellis closest to the received encoded data sequence
How does convolutional coding enhance error correction capabilities in GSM?
By introducing redundancy to detect and correct errors
What is the significance of the state diagram in convolutional encoding?
It visualizes the present and next states in the encoding process
Which algorithm is used for decoding convolutional codes?
Viterbi algorithm
Why is convolutional coding preferred in GSM for voice calls and data transmission?
To enhance error correction capabilities over the wireless channel
Learn about convolutional codes and generator polynomials in communication channels. Understand how generator polynomials are used to create codes for transmission. Explore the advantages of convolutional codes in noisy environments.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
