A novel approach for random interleavers in IDMA system
ICCOM'07 Proceedings of the 11th Conference on 11th WSEAS International Conference on Communications - Volume 11
Journal of Electrical and Computer Engineering - Special issue on iterative signal processing in communications
Design and implementation of turbo decoder for TETRA release 2 - TEDS
ICHIT'11 Proceedings of the 5th international conference on Convergence and hybrid information technology
Implementation of a Radix-4, Parallel Turbo Decoder and Enabling the Multi-Standard Support
Journal of Signal Processing Systems
Design and implementation of a linear feedback shift register interleaver for turbo decoding
VDAT'12 Proceedings of the 16th international conference on Progress in VLSI Design and Test
| Hi-index | 754.84 |
It is well known that an interleaver with random properties, quite often generated by pseudo-random algorithms, is one of the essential building blocks of turbo codes. However, randomly generated interleavers have two major drawbacks: lack of an adequate analysis that guarantees their performance and lack of a compact representation that leads to a simple implementation. We present several new classes of deterministic interleavers of length N, with construction complexity O(N), that permute a sequence of bits with nearly the same statistical distribution as a random interleaver and perform as well as or better than the average of a set of random interleavers. The new classes of deterministic interleavers have a very simple representation based on quadratic congruences and hence have a structure that allows the possibility of analysis as well as a straightforward implementation. Using the new interleavers, a turbo code of length 16384 that is only 0.7 dB away from capacy at a bit-error rate (BER) of 10-5 is constructed. We also generalize the theory of previously known deterministic interleavers that are based on block interleavers, and we apply this theory to the construction of a nonrandom turbo code of length 16384 with a very regular structure whose performance is only 1.1 dB away from capacity at a BER of 10-5