递归SOQPSK-TG信号的两状态判决反馈解调算法

doi:10.3969/j.issn.1000-436x.2014.07.007

通信学报 ›› 2014, Vol. 35 ›› Issue (7): 56-62.doi: 10.3969/j.issn.1000-436x.2014.07.007

递归SOQPSK-TG信号的两状态判决反馈解调算法

孙锦华,韩会梅

西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071

出版日期:2014-07-25 发布日期:2017-06-24
基金资助:
国家自然科学基金资助项目;国家自然科学基金资助项目;中央高校基本科研业务费专项基金资助项目;中央高校基本科研业务费专项基金资助项目

Decision feedback demodulation algorithm for recursive SOQPSK-TG signal

UNJin-hua S,ANHui-mei H

State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China

Online:2014-07-25 Published:2017-06-24
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;The Fundamental Research Funds for the Central Universities;The Fundamental Research Funds for the Central Universities

摘要/Abstract

摘要：

针对利用两状态网格图对递归部分响应成形偏移正交相移键控SOQPSK-TG信号进行解调时，网格图状态变量与累积相位不存在一一对应关系的问题，研究了解决此问题的判决反馈解调算法。该算法根据两状态网格图，在网格状态转移过程中，通过判决反馈，得到状态变量对应的累积相位。仿真结果表明，在信噪比大于0 dB时，SOQPSK-TG信号两状态判决反馈解调算法可以获得接近四状态解调的误比特性能。

关键词: 成形偏移正交相移键控, 递归, 判决反馈, 解调

Abstract:

To solve the problem of one-to-one correspondence relationship not existing between state variable and cumu-lative phase in two-state trellis of shaped-offset quadrature phase-shift keying(SOQPSK-TG), a decision feedback de-modulation algorithm for recursive SOQPSK-TG is researched. According to a two-state trellis , cumulative phase corre-sponding to the state variable is obtained by decision feedback in state transition. Simulation results show that at E_b/N₀≥0 dB, the decision feedback demodulation algorithm can achieve a BER performance which is very close to four-state demodulation algorithm performance.

Key words: shaped offset quadrature phase-shift keying, recursive, decision feedback, demodulation

孙锦华,韩会梅. 递归SOQPSK-TG信号的两状态判决反馈解调算法[J]. 通信学报, 2014, 35(7): 56-62.

UNJin-hua S,ANHui-mei H. Decision feedback demodulation algorithm for recursive SOQPSK-TG signal[J]. Journal on Communications, 2014, 35(7): 56-62.

图/表 5

参考文献 15

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递归SOQPSK-TG信号的两状态判决反馈解调算法

Decision feedback demodulation algorithm for recursive SOQPSK-TG signal

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