A Novel RS Decoder Based on LCC Algorithm

Compared to the conventional hard-decision decoding algorithm, the algorithm of soft-decision decoding RS code could achieve larger coding gain, but its hardware implementation is more complex. To solve this problem, an improved syndrome algorithm based on low-complexity chase (LCC) soft decision decoding is presented in this paper, which can significantly reduce the hardware complexity without having an effect on the decoding performance. Compared to the existing RS decoder based on syndrome computation, the hardware consumption of the proposed one for RS (255, 239) code with <em<η</em<=3 and BPSK modulation in AWGN channel can be reduced by 20%. Under SMIC 0.18 μm CMOS process, the chip area is only about 0.81 mm<sup<2</sup<.