单通道同频混合信号的最佳接收及盲解调性能界
Optimal receiver and blind demodulation performance bounds for single channel co-frequency mixed signals
- 通信学报 2024年45卷第12期 页码：142-152
- 作者机构：
信息工程大学信息系统工程学院，河南 郑州 450000
- 作者简介：
[ "于宏毅（1963- ），男，内蒙古呼和浩特人，博士，信息工程大学教授、博士生导师，主要研究方向为无线通信、智能信号处理等。" ]
[ "查仁鹏（1999- ），男，四川隆昌人，信息工程大学硕士生，主要研究方向为盲信号处理、信道编译码技术等。" ]
[ "沈智翔（1985- ），男，浙江湖州人，博士，信息工程大学讲师，主要研究方向为无线通信、通信信号处理。" ]
[ "沈彩耀（1981- ），男，福建漳州人，博士，信息工程大学讲师，主要研究方向为智能通信、通信信号处理。" ]
[ "胡赟鹏（1978- ），男，江西南昌人，博士，信息工程大学副教授、硕士生导师，主要研究方向为通信信号处理。" ]
- 基金信息：国家自然科学基金资助项目(61501517)
DOI：10.11959/j.issn.1000-436x.2024265
中图分类号： TN911.7收稿：2024-09-12，
修回：2024-11-26，
纸质出版：2024-12-25
- 稿件说明：
移动端阅览
于宏毅,查仁鹏,沈智翔等.单通道同频混合信号的最佳接收及盲解调性能界[J].通信学报,2024,45(12):142-152.
YU Hongyi,ZHA Renpeng,SHEN Zhixiang,et al.Optimal receiver and blind demodulation performance bounds for single channel co-frequency mixed signals[J].Journal on Communications,2024,45(12):142-152.
于宏毅,查仁鹏,沈智翔等.单通道同频混合信号的最佳接收及盲解调性能界[J].通信学报,2024,45(12):142-152. DOI： 10.11959/j.issn.1000-436x.2024265.
YU Hongyi,ZHA Renpeng,SHEN Zhixiang,et al.Optimal receiver and blind demodulation performance bounds for single channel co-frequency mixed signals[J].Journal on Communications,2024,45(12):142-152. DOI： 10.11959/j.issn.1000-436x.2024265.
摘要
针对混合信号码元序列的最佳检测问题，在同频混合接收基带信号模型的基础上，推导得到联合最大似然盲检测的充分统计量，并给出“混叠波形匹配滤波+符号速率双抽样”的最佳接收机设计。基于充分统计量模型，利用Forney方法推导出了同频混合信号单通道盲解调的性能下界。由于最佳接收机的复杂度随等效符号速率抽样信道长度呈指数增长，针对实际应用中的信道截短问题，进一步分析了截短误差对盲解调性能的影响。结果表明，最佳接收机仿真结果与理论性能分析结果吻合，验证了所推导性能界的合理性。
Abstract
Aiming at the problem of optimal detection of mixed signal symbol sequences
on the basis of co-frequency mixed receiving baseband signal model
sufficient statistics for joint maximum likelihood blind detection were derived
and the optimal receiver design of “mixed waveform matched filtering and symbol rate dual sampling” was given. Based on the sufficient statistics model
a lower bound on the performance of single-channel blind demodulation for co-frequency mixed signals was derived using Forney’s method. Since the complexity of the optimal receiver grows exponentially with the equivalent symbol rate sampling channel length
the impact of the truncation error on the blind demodulation performance was further analyzed for the channel truncation problem in practical applications. The result shows that the simulation results of the optimal receiver coincide with the theoretical performance analysis results
verifying the reasonableness of the derived performance bounds.
关键词
Keywords
references
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