突发信道中的Turbo译码结构的研究

The Study of Extended Turbo Decoder S tructures for Burst Error Channels

在突发信道中,同步误差会显著降低Turbo码的误比特率性能。利用二进制对称信道(BSC)和高斯信道(AWGN)的级联进行信道建模,提出了一种扩展的Turbo译码结构,该结构有效地克服了突发噪声带来的信号相位偏移。仿真结果表明这种方案与传统方法相比,在复杂度提高不多的情况下,提高了误比特率性能。

The performance of Turbo codes suffe rs a lot in burst error channel where t he signal has been prevented from perfect synchro nization.By modelling such a channel into a concatenation of the BSC and AWGN channel,we present an exten ded version of Turbo decoder,which can cope with occasional phase shift.Simulation results show that the proposed scheme outperforms the traditional one.