基于高阶频谱时频分布的QAM信号分析

[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics Pub Date : 1993-06-07 DOI:10.1109/HOST.1993.264556

J. Fonollosa, C. Nikias

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引用次数: 3

摘要

在一定的假设条件下，可以推导出任意正交调幅通信信号的双线性和多线性时频表示的期望值的简单解析表达式。符号序列应为i - id，调制星座的实部和虚部分布独立且相同。首先，利用二阶矩和高阶矩以及基于频谱的时频分布对QAM调制方案进行了表征。然后利用这一特性推导出QAM信号检测方案。这些方案在低信噪比和窄带干扰下进行了测试

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Analysis of QAM signals using higher-order spectra-based time-frequency distributions

Under certain assumptions, simple analytical expressions can be derived for the expected value of bilinear and multilinear time-frequency representations of any quadrature-amplitude modulated communication signal (QAM). The symbol sequence should be i.i.d. and the modulation constellation should have independent and identically distributed real and imaginary parts. Initially, a characterization of QAM modulation schemes using second-order and higher-order moments and spectra-based time-frequency distributions is given. Then this characterization is exploited to derive QAM signal detection schemes. These schemes are tested in low SNR and against narrowband interference.<>

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[1993 Proceedings] IEEE Signal Processing Workshop on Higher-Order Statistics

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