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Low phase noise coherent transceiver front-end for X-band multichannel chirped radar based on phase-synchronous optoelectronic oscillator
Optics Communications ( IF 2.4 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.optcom.2019.125194
Yiran Gao , Jian Dai , Zhonghan Wu , Tian Zhang , Kun Xu

Abstract A coherent front-end for X-band multichannel chirped radar based on the phase-synchronous optoelectronic oscillator (OEO) with low phase noise is proposed and experimentally demonstrated. In the experiment, the pulses with an instantaneous frequency decreasing from 9.96 to 9.94-GHz are transmitting and receiving. The corresponding phase noise is about –132.1 dBc/Hz at 10-kHz offset frequency. Thanks to the direct digital synthesizer (DDS), the repetition rate and occupied bandwidth can be flexible tuned. For the simulative three-channel system, the signal-to-noise ratio (SNR) of the received signal was enhanced as 4.73-dB relative to that before pulses accumulation. The proposed method can be potentially applied in the multi-channel radar.

中文翻译:

基于相位同步光电振荡器的X波段多通道啁啾雷达低相位噪声相干收发器前端

摘要 提出了一种基于低相位噪声的相位同步光电振荡器(OEO)的X波段多通道啁啾雷达相干前端,并进行了实验验证。在实验中,瞬时频率从 9.96 GHz 下降到 9.94 GHz 的脉冲正在发射和接收。在 10 kHz 偏移频率下,相应的相位噪声约为 –132.1 dBc/Hz。由于采用了直接数字合成器(DDS),可以灵活调整重复率和占用带宽。对于模拟三通道系统,接收信号的信噪比 (SNR) 相对于脉冲累积前提高了 4.73 dB。所提出的方法可以潜在地应用于多通道雷达。
更新日期:2020-04-01
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