arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv cs/0508057cs.ITmath.IT
收藏

Turbo码在准静态衰落信道中的性能研究

On the Performance of Turbo Codes in Quasi-Static Fading Channels

M. R. D. Rodrigues, I. Chatzigeorgiou, I. J. Wassell, R. Carrasco

摘要:

在本文中,我们详细研究了Turbo码在准静态衰落信道中有无天线分集的性能。首先,我们开发了一个简单而准确的分析技术来评估Turbo码在准静态衰落信道中的性能。所提出的分析技术涉及的帧出错率的Turbo码的迭代解码器的收敛阈值,而不是Turbo码的距离谱。随后,我们比较了各种Turbo码在准静态衰落信道中的性能。我们发现,在AWGN信道的情况下,不同的交织器大小的Turbo码或基于RSC码的Turbo码具有不同的约束长度和生成多项式表现出相同的性能。此外,我们还比较了Turbo码和卷积码在相同译码复杂度条件下在准静态衰落信道中的性能。特别是,我们表明,涡轮码不优于卷积码在准静态衰落信道中没有天线分集,和涡轮码只优于卷积码在准静态衰落信道中的天线分集。

英文摘要:

In this paper, we investigate in detail the performance of turbo codes in quasi-static fading channels both with and without antenna diversity. First, we develop a simple and accurate analytic technique to evaluate the performance of turbo codes in quasi-static fading channels. The proposed analytic technique relates the frame error rate of a turbo code to the iterative decoder convergence threshold, rather than to the turbo code distance spectrum. Subsequently, we compare the performance of various turbo codes in quasi-static fading channels. We show that, in contrast to the situation in the AWGN channel, turbo codes with different interleaver sizes or turbo codes based on RSC codes with different constraint lengths and generator polynomials exhibit identical performance. Moreover, we also compare the performance of turbo codes and convolutional codes in quasi-static fading channels under the condition of identical decoding complexity. In particular, we show that turbo codes do not outperform convolutional codes in quasi-static fading channels with no antenna diversity; and that turbo codes only outperform convolutional codes in quasi-static fading channels with antenna diversity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑