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由于Turbo码优异的纠错性能 ,使得其在第三代移动通信 ( 3G)系统中倍受重视。无论是WCDMA还是cdma2 0 0 0都将其作为侯选的信道编码方案 ,并且将其列为 3G的核心技术之一。但是Turbo码存在译码复杂度大、译码延时长的缺点。在这里 ,我们提出一种用于cdma2 0 0 0的低复杂度Turbo码译码器 ,即结合CRC校验来减少译码过程中的迭代次数。仿真结果证明使用该译码器可以在大信噪比时大大降低译码复杂度和译码延时。
Turbo code due to its excellent error correction performance, making it much attention in the third generation mobile communication (3G) system. Whether it is WCDMA or cdma2000 as candidate channel coding scheme, and will be listed as one of the core technologies of 3G. However, Turbo codes have the disadvantages of high decoding complexity and long decoding delay. Here, we propose a low-complexity Turbo code decoder for cdma2000 that combines CRC checks to reduce the number of iterations in the decoding process. Simulation results show that the decoder can greatly reduce the decoding complexity and decoding delay at large signal-to-noise ratio.