时间分集微波光子MIMO收发系统设计

崇 毓华, 王 润, 田 朝辉
中国电子科技集团公司第三十八研究所

摘要


多输入多输出(Multiple-input multiple-output, MIMO)技术与逆合成孔径相结合的成像技术,具有阵元数量少、积累时间短的优点,可有效提高距离分辨率和方位分辨率。本文面向高分辨率成像应用,比较时间分集和频率分集在系统规模、性能指标和可扩展性等方面的优缺点,提出一种时间分集微波光子MIMO收发系统,在发射端采用光开关时分复用的方式实现正交信号产生与发射,大大降低发射端和接收端的复杂度;在接收端采用阵列化光去斜接收技术,采用低速模数转换器即可对去斜后的中频信号进行采集,大大降低了模数转换及后续信号处理的难度。

关键词


MIMO;收发系统;高分辨成像;阵列化

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参考


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