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INTERLEAVERS FOR KB TURBO CODE |
Sun Yi; Gao Lu; Zhao Jianping; Wu Weiling |
Dept. of Infor. Eng., Beijing Univ. of Posts and Telecomm., Beijing 100876 China |
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Abstract Known Bits(KB) method is a way of increasing the performance of turbo code by inserting known bits periodically in a code word without increasing in complexity. KB method normally causes uneven protection due to the process of random interleaving. This problem can be solved with a KB interleaver to ensure uniform distribution of KB. It is found that KB interleaver can improve the performance of turbo code with pseudo random interleaver or S-random interleavers. This method also makes a rate-matching to be easy which is fairly important for systems using turbo codes.
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Received: 20 July 1999
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