一种基于光子学的超外差RF接收方法
A Photonics-based superheterodyne RF reception approach
摘要：
提出了一种新的基于光子学的RF接收方法，作为一种有竞争力的解决方案，以满足当前的挑战，基于光子学的方法，并实现高性能的同时。该方法采用电子技术和光子技术相结合的超外差结构，包括超宽带光本振产生、两级光子超外差变频和实时中频补偿。一个工程原型已经开发，其性能已在实验室环境中进行了评估。实验结果初步验证了该方法的可行性及其工程应用潜力。其典型性能为：工作频谱范围为0.1 GHz~ 45 GHz（>40 GHz），瞬时带宽900 MHz，SFDR为101 dBHz 2/3，LDR为130 dBHz，镜像抑制一次变频约80 dB，二次变频>90 dB。
英文摘要：
A novel photonics-based RF reception approach is proposed as a competitive solution to meet the current challenges of photonic-based approaches and to realize high performances at the same time. The proposed approach adopts the superheterodyne configuration by a combination manner of electronic techniques and photonic techniques, including the ultrawideband generation of optical LO, the two-stage photonic superheterodyne frequency conversion and the real-time IF compensation. An engineering prototype has been developed and its performance has been evaluated in the laboratory environment. The experiment results preliminarily verify the feasibility of the proposed approach and its engineering potential. The typical performances are as follows: 0.1 GHz~ 45GHz operation spectrum range (>40 GHz), 900 MHz instantaneous bandwidth, 101 dBHz2/3 SFDR and 130 dBHz LDR, image rejections of ~80 dB for 1st frequency conversion and >90 dB for 2nd frequency conversion.
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