Title :
Deriving performance bounds for ISI channels using Gallager codes
Author :
A. Kavcic;B. Marcus;M. Mitzenmacher;B. Wilson
Author_Institution :
Dept. of Eng. & Appl. Sci., Harvard Univ., Cambridge, MA, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
We develop density evolution methods for evaluating the performance of Gallager´s low-density parity-check (LDPC) codes over binary intersymbol interference (ISI) channels. In contrast to previous work on memoryless channels, the noise tolerance thresholds for ISI channels depend on the transmitted sequences. The concentration statements are appropriately adjusted to reflect this difference. We compare the thresholds of regular Gallager codes over the 1-D partial response channel to the i.i.d. information rate, showing that at high code rates, regular Gallager codes are asymptotically optimal.
Keywords :
"Intersymbol interference","AWGN","Parity check codes","Additive white noise","Gaussian noise","Decoding","Memoryless systems","Partial response channels","Random sequences","Polynomials"
Conference_Titel :
Information Theory, 2001. Proceedings. 2001 IEEE International Symposium on
Print_ISBN :
0-7803-7123-2
DOI :
10.1109/ISIT.2001.936208
