【摘要】 维特比译码器是人们广泛采用的卷积码的译码器,在IS-95,GSM,3GPP中都有广泛的应用。文中首先简单说明Viterbi译码算法原理,接着分析Viterbi译码算法设计及伪代码实现,根据TD-SCDMA卷积码编码方案,设计了一种采用软判决方式的维特比译码器,并采用合理的归一化方式,保证了计算路径值的过程中不会发生溢出。仿真表明:改进的译码器具有良好的性能。更多还原

【Abstract】 Viterbi decoder is widely to implement convolutional decoding. It has been broadly applied in IS-95,GSM,3GPP. In this paper, the principle of Viterbi is briefed first, then the Viterbi decode design and Pseudo Code for the Viterbi Algorithm are analyzed. The paper described a Viterbi decoder based on convolutional coding scheme TD-SCDMA and with soft judgement. Simulations show that the modified decoder is robust and of better performance.更多还原