AWGN信道中的超正交卷积Turbo码的性能

The Performance of Superorthogonal Convolutional Turbo Codes for AWGN Channel

超正交卷积适合于扩频通讯应用。 Petri提出了超正交卷积 Turbo码 (SuperorthogonalConvolutional Turbo Code ,SCTC) [1 ] ,由于带宽的扩展 ,这类码的性能比一般的 Turbo码好。推导了一般 SCTC码的构造 ,同时导出了存储单元分别为 2 ,3的 SCTC的转移函数。最后分别给出了 AWGN信道下 SCTC码的误码率性能上限 ,计算机模拟的 max- log- MAP和

Superorthogonal Convolutional codes are suitable for spreadspectrum applications. Petri proposed superorthogonal convolutional turbo codes (SCTCs). Duo to the bandwidth expansion, these codes outperform the ordinary turbo code. The general structure of SCTC encoder is derived in this paper. The transfer functions of 2-, and 3-memory are also given for performance bound analysis. Simulation results of both max log MAP and SOVA in AWGN channel are presented, along with bounds of bit error probabilities.