Computer Science – Information Theory
Scientific paper
2010-04-26
Computer Science
Information Theory
This paper has been withdrawn by the authors. The paper has been moved to 0909.0105 to avoid redundancy
Scientific paper
The use of open-loop coding can be easily extended to a closed-loop concatenated code if the channel has access to feedback. This can be done by introducing a feedback transmission scheme as an inner code. In this paper, this process is investigated for the case when a linear feedback scheme is implemented as an inner code and, in particular, over an additive white Gaussian noise (AWGN) channel with noisy feedback. To begin, we look to derive the optimal linear feedback scheme by optimizing over the received signal-to-noise ratio. From this optimization, an asymptotically optimal linear feedback scheme is produced and compared to other well-known schemes. Then, the linear feedback scheme is implemented as an inner code to a concatenated code over the AWGN channel with noisy feedback. This code shows improvements not only in error exponent bounds, but also in bit-error-rate and frame-error-rate. It is also shown that the if the concatenated code has total blocklength L and the inner code has blocklength, N, the inner code blocklength should scale as N = O(C/R), where C is the capacity of the channel and R is the rate of the outer code. Simulations with low density parity check (LDPC) and turbo codes are provided to display these advantages.
Chance Zachary
Love David J.
No associations
LandOfFree
Concatenated Coding for the AWGN Channel with Noisy Feedback does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Concatenated Coding for the AWGN Channel with Noisy Feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concatenated Coding for the AWGN Channel with Noisy Feedback will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-32835