高频地波雷达(HFSWR)被广泛应用于海洋表面动力学参数反演和海上移动目标的探测。传统的HFSWR 多采取单一波形体制,难以同时实现远近距离的海洋状态及快慢速目标的探测,无法充分发挥HFSWR 的优势。针对该问题,提出了一款能够实现复合波形体制的全数字高频雷达接收机,通过两路独立的信号通道合成两路互不干扰的发射波形,在接收端采用不同的匹配滤波机制对回波信号进行实时处理。闭环测试和外场实验结果表明,该接收机能够很好地完成两种波形体制的兼容工作,实现对远近距离海洋状态进行同时探测。

High-frequency surface wave radar (HFSWR) has been widely applied in sea surface dynamic parameters measurement and targets detection over the horizon. However, traditional HFSWR mostly adopts a single waveform scheme, which makes it difficult to achieve both the measurement of ocean state at different distances and detection of targets with different speeds simultaneously, so the advantages of HFSWR can′t be fully utilized. In response to this problem, a fully-digital HFSWR receiver with a composite waveform scheme is proposed. Two independent signal channels are used to synthesize two non-interfering transmit waveforms, and different matched filtering mechanisms are used to process the echo signals in real time at the receiving end. The results of closed-loop test and field experiment show that the receiver can meet the compatibility requirements of the two waveform schemes, and realize the simultaneous detection of ocean states and targets in long and short distance, which will improve the performance of HFSWR.

TN958.3

广东省重点领域研发计划(2020B1111020005);科技部重点研发计划(2016YFC1401100);自然科学基金面上项目(61771352)