Turbo码在3GPP短帧数据传输中的性能分析

PERFORMANCE ANALYSIS OF TURBO CODE IN SHORT-FRAME DATA SERVICES OF 3GPP

国际电信联合会在UMTS/3GPP规范中推荐 8状态Turbo码与 2 5 6状态卷积码作为数据纠错的方案。本文基于 8状态Turbo码输出码字的距离谱分布特性 ,对短帧数据传输中Turbo码的误码性能联合界进行了估计 ,并进行了验证。仿真结果同时显示出在信噪比高于 1 75dB时Turbo码的误码性能优于 2 5 6状态卷积码 。

In UMTS/3GPP standards, International Telecommunication Union recommends the use of 8-states turbo codes and 256-states convolutional codes as data error-correcting schemes. Based on the distance spectrum of turbo codes, this paper presented the corresponding BER performance union bounds in short-frame data transmission, which was proved by simulation results. Compared with convolutional codes, simulation results also show that turbo codes have better BER performance and lower decoding complexity at SNR above 1.75 dB.