Broadband lower-IF RF receiver based on microwave photonic mixer and Kramers-Kronig detection.
Broadband lower-IF RF receiver based on microwave photonic mixer and Kramers-Kronig detection.
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DOI：
10.1364/oe.26.026400
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发表时间：
2018-09
期刊：
影响因子：
3.8
通讯作者：
Chunjing Yin;Jianqiang Li;Liang Shu;Zhenming Yu;Feifei Yin;Yue Zhou;Yitang Dai;Kun Xu
中科院分区：
文献类型：
--
作者：
Chunjing Yin;Jianqiang Li;Liang Shu;Zhenming Yu;Feifei Yin;Yue Zhou;Yitang Dai;Kun Xu
提出了一种基于微波光子混频器和Kramers-Kronig（KK）检测的低成本、低复杂度的宽带低中频射频接收机，并进行了实验验证。通过比较采用和不采用KK检测的下变频IF信号的误差矢量幅度（EVM）性能，验证了所提出的RF接收机的可行性。EVM是作为IF载波频率、输入本振（LO）功率、输入RF功率以及RF和LO路径之间的耦合比的函数进行测量的。当中频载波频率接近信号带宽的一半时，使用KK检测可以将EVM提高9.5%以上。这意味着可以用良好的EVM对较低的IF频率进行下变频，并且低速光电检测器和低采样率模数转换器可以用于宽带RF信号接收。
A broadband lower- intermediate-frequency (IF) radio frequency (RF) receiver with low cost and complexity based on a microwave photonic mixer and Kramers-Kronig (KK) detection is proposed and experimentally demonstrated. The feasibility of the proposed RF receiver is verified by comparing the error vector magnitude (EVM) performance of a down-converted IF signal with and without KK detection. EVM is measured as a function of IF carrier frequency, input local oscillator (LO) power, input RF power, and the coupling ratio between RF and LO paths. With KK detection, EVM can be improved by more than 9.5% when the IF carrier frequency is close to half of the signal bandwidth. This implies that a lower IF frequency can be down-converted with good EVM and that a low-speed photodetector and a low sampling rate analog to digital converter can be used for wideband RF signal reception.