摘要
由于在同步Nyquist折叠接收机结构中使用了多分量本振及对应的数字信号处理算法,单个双通道模数转换器所接收的信号频率范围可超过其Nyquist采样带宽。针对同步Nyquist折叠接收机结构,提出了基于Wigner-Hough变换的参数估计算法。对算法的理论分析表明,对不同本振周期信号的Wigner-Hough变换进行积累,能有效提高Nyquist区域检测性能。最后,仿真结果证实了提出的算法在输入信噪比优于-15dB后,能获得准确的频率估计结果。
Using multicomponent local signal and relevant digital signal processing algorithm, the signal bandwidth received by single two-channel ADC of synchronous Nyquist folding receiver （SNYFR） is wider than its Nyquist sampling bandwidth. An algorithm of parameter estimation based on Wigner-Hough transform （WHT） for SNYFR was proposed. The numerical analysis showed that accumulating WHT of different periods＇ signal could improve the detection accuracy of the Nyquist frequency range. Simulation results verified that the proposed algorithm could achieve accurate parameters estimation when SNR was better than -15 dB.
出处
《微电子学》
CAS
CSCD
北大核心
2015年第6期693-697,共5页
Microelectronics
基金
国家高技术研究发展(863计划)资助项目(2014AA8098088B)
