双二元Turbo码的译码算法研究

Research on the decoding algorithm for double-binary Turbo code

双二元Turbo码(double-binary Turbo code)是支持无线城域网(WMAN)的802.16d标准中多载波OFDM系统物理层采用的前向纠错码方案之一。相对于经典Turbo码,它具有编码效率高,相同复杂度译码器下纠错性能好以及译码时延小等优点。现介绍了双二元Turbo码的编码器结构特点,并且详细推导了双二元Turbo码的两种译码算法,同时给出了仿真性能曲线。

Double - binary Turbo code is one of the FEC methods for multi - carrier OFDM physical layer of 802.16 standard which supports the WMAN. It has many advantages compared to the classical Turbo code, such as higher encoding efficiency, better error - correcting performance for the equivalent implementation complexity and lower decoding latency. The feature of the encoder structure for double - binary Turbo code is introduced and two decoding algorithms are deduced in detail in this paper , while the simulation results are given as well.