基于软件无线电的编码调制信号性能分析

doi:10.3969/j.issn.0255-8297.2017.03.001

应用科学学报 ›› 2017, Vol. 35 ›› Issue (3): 275-287.doi: 10.3969/j.issn.0255-8297.2017.03.001

基于软件无线电的编码调制信号性能分析

邹杰, 陈为刚, 杨晋生

天津大学微电子学院, 天津 300072

收稿日期:2016-07-07 修回日期:2016-10-17 出版日期:2017-05-30 发布日期:2017-05-30
通信作者: 陈为刚，副教授，研究方向：无线通信理论与系统、信息理论与编码技术，E-mail：chenwg@tju.edu.cn E-mail:chenwg@tju.edu.cn
基金资助:
天津市科技兴海项目基金（No.KJXH2011-2）；国家自然科学基金（No.61671324）资助

Performance Analysis of Coded Modulation Signal Based on Software-Defned Radio

ZOU Jie, CHEN Wei-gang, YANG Jin-sheng

School of Microelectronics, Tianjin University, Tianjin 300072, China

Received:2016-07-07 Revised:2016-10-17 Online:2017-05-30 Published:2017-05-30

摘要/Abstract

摘要：

为评估编码调制信号在实际无线信道下的性能，利用通用软件无线电外设（universalsoftware radio peripheral,USRP）对Turbo码、二进制低密度奇偶校验（low density paritycheck,LDPC）码、多进制LDPC码等3种信道编码方案的八进制相移键控调制信号实际性能进行对比分析。为保证译码器获得准确的先验信息，首先基于同步序列实现八进制相移键控系统相位模糊的检测和恢复；然后利用经验特征函数实现信道噪声方差的估计；进而计算出译码器输入符号的先验概率。仿真与测试结果表明，在较短的码长下，采用上述3种编码方式均可以获得优越的系统性能，并且多进制LDPC码的性能优于2进制LDPC码与Turbo码的性能。

关键词: 软件无线电, 八进制相移键控, Turbo码, 多进制LDPC码, 二进制LDPC码

Abstract:

To evaluate the performance of coded and modulated signals in a wireless channel, experiments are performed based on the universal software radio peripheral (USRP). Performances of coding and modulation schemes using 8 phase-shift keying and three channel coding schemes, including turbo codes, binary low density parity check (LDPC) codes and non-binary LDPC codes, are compared and analyzed. To ensure accuracy of the apriori probability, phase ambiguity in the symbol of 8 phase-shift keying is detected and recovered based on frame synchronization sequences. An empirical characteristic function is used to estimate the channel noise variance. Furthermore, a priori probability is calculated from the recovered symbol and the estimated noise variance. Simulation and experimental results show that, with short code length, superior performance can be achieved with the three channel coding schemes, and non-binary LDPC codes performs better than binary LDPC codes and Turbo codes.

Key words: software-defned radio, 8 phase-shift keying, Turbo codes, binary LDPC codes, non-binary LDPC codes

中图分类号:

TN925

邹杰, 陈为刚, 杨晋生. 基于软件无线电的编码调制信号性能分析[J]. 应用科学学报, 2017, 35(3): 275-287.

ZOU Jie, CHEN Wei-gang, YANG Jin-sheng. Performance Analysis of Coded Modulation Signal Based on Software-Defned Radio[J]. Journal of Applied Sciences, 2017, 35(3): 275-287.

参考文献

[1] Sablatash M, Craig S T, Mortimer B. Methods and formulas for computer simulation studies of the performance of error-correcting codes for the North American Basic Teletext System (NABTS)[J]. IEEE Transactions on Broadcasting, 1990, 36(2):132-145.
[2] Park S J. Performance analysis of triangular quadrature amplitude modulation in AWGN channel[J]. IEEE Communications Letters, 2012, 16(16):765-768.
[3] Andersen J B, Rappaport T S, Yoshida S. Propagation measurements and models for wireless communications channels[J]. IEEE Communications Magazine, 1995, 33(1):42-49.
[4] Sen S, Zhang T, Gtlani S, Srinath S. Design and implementation of an “approximate” communication system for wireless media applications[J]. IEEE/ACM Transactions on Networking, 2013, 21(4):1035-1048.
[5] Mitola J. Software radios:survey, critical evaluation and future directions[J]. IEEE Aerospace and Electronic Systems Magazine, 1993, 8(4):25-36.
[6] Bogale T E, Vandendorpe L. USRP implementation of max-min SNR signal energy based spectrum sensing algorithms for cognitive radio networks[C]//Proceedings of International Conference on Communications. Sydney, Australia:IEEE Press, 2014:1478-1482.
[7] Hussain A, Glazunov A A, Einarsson B P, Kildal P. Antenna measurements in reverberation chamber using USRP[J]. IEEE Transactions on Antennas & Propagation, 2016, 64(3):1152-1157.
[8] Ell-hajjar M, Nguyen Q A, Maunder R G. Demonstrating the practical challenges of wireless communications using USRP[J]. IEEE Communications Magazine, 2014, 52(5):194-201.
[9] 陈为刚,李思,赵干,杨晋生. 基于软件无线电的Turbo码编码通信系统实现[J]. 电子测量技术, 2013, 36(11):110-114. Chen W G, Li S, Zhao G, Yang J S. Turbo coded communication system implementation based on software defned radio[J]. Electronic Measurement Technology, 2013, 36(11):110-114. (in Chinese)
[10] Danesfahani G R, Jeans T G. Optimization of modifed Muller and Muller algorithm[J]. Electronics Letters, 1995, 31(13):1032-1033.
[11] Lu X X, Li J, Liu Y. New soft-encoding relay (SoER) mechanisms for wireless relay systems:convolutional and Turbo constructions[J]. IEEE Transactions on Wireless Communications, 2015, 14(11):2443-2457.
[12] Tseng C F, Tarng J H. Low-complexity and piecewise systematic encoding of non-full-rank QC-LDPC codes[J]. IEEE Communications Letters, 2015, 19(6):897-900.
[13] Vogt J, Finger A. Improving the Max-Log-MAP Turbo decoder[J]. Electronics Letters, 2000, 36(23):1937-1939.
[14] Chen J, Fossorier M P C. Near optimum universal belief propagation based decoding of lowdensity parity check codes[J]. IEEE Transactions on Communications, 2002, 50(3):406-414.
[15] Han G, Guan Y L, Huang X. Check node reliability-based scheduling for BP decoding of non-binary LDPC codes[J]. IEEE Transactions on Communications, 2013, 61(3):877-885.
[16] Ilow J, Hatzinakos D. Applications of the empirical characteristic function to estimation and detection problems[J]. Signal Processing, 1998, 65(2):199-219.
[17] Peng F, Ryan W. Low-complexity soft demapper for OFDM fading channels with ICI[C]//Proceedings of Wireless Communications and Networking Conference. Las Vegas, USA:IEEE Press, 2006:1549-1554.

基于软件无线电的编码调制信号性能分析

Performance Analysis of Coded Modulation Signal Based on Software-Defned Radio

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 8

编辑推荐

Metrics

本文评价

[1]	罗加兴, 陈为刚, 杨晋生. 基于软件无线电平台的分布式天线系统实现[J]. 应用科学学报, 2018, 36(6): 894-903.
[2]	高树立, 陈为刚, 杨晋生. 基于软件无线电的改进级联码验证实现[J]. 应用科学学报, 2017, 35(2): 149-159.
[3]	蒋宇中, 胡修林, 张曙霞. 非高斯噪声中Turbo码的性能改进研究[J]. 应用科学学报, 2006, 24(4): 336-340.
[4]	史清, 李国通, 梁旭文, 杨根庆. 基于软件无线电的卫星便携式测控站[J]. 应用科学学报, 2004, 22(4): 467-470.
[5]	阿哈麦德, 潘志文, 高西奇, 尤肖虎. Turbo码和空时块码接连调制系统的研究[J]. 应用科学学报, 2004, 22(1): 10-15.
[6]	唐朝京, 刘东华. 基于二次同余映射交织器设计的改进[J]. 应用科学学报, 2002, 20(3): 246-250.
[7]	赵光玲, 吴乐南. 一种为Turbo码设计的节省存储单元的交织器[J]. 应用科学学报, 2002, 20(2): 116-118.
[8]	赵光玲, 吴乐南. 几种用于Turbo码的交织器分析[J]. 应用科学学报, 2002, 20(1): 38-41.