High Throughput Stochastic Log-MAP Turbo-Decoder Based on Low Bits Computation
Jienan Chen, Jianhao Hu · IEEE Signal Processing Letters · 2013
In this letter, we propose a high throughput stochastic Low Bits Computation (LBC) turbo decoder. We represent the signal by a 3-bits width stochastic stream, which improves the accuracy of stochastic computation significantly. We have designed and synthesized our design based on CMOS 90 nm technology. The report shows that the proposed decoder can achieve 4.0 Gbps with 7.1 M gate count to decode a 2048-length R=1/3 turbo code, when the bit error rate (BER) is 10-5@ Eb/N0=1.25 dB.