基于单路DDS源的双路宽带信号预失真技术

Double Pre-distortion Technology of Broadband Signals Based on Single DDS Source

文章针对雷达无盲区探测与高分辨距离像同时实现的矛盾,提出单DDS源的双路宽带信号预失真技术。通过原理分析,给出发射通道误差在线补偿、本振通道误差后处理补偿的预失真流程,完成两路宽带线号的预失真处理,解决雷达无盲区探测与高分辨距离像同时实现的矛盾。同时,单路DDS源产生双路宽带信号的方法还能降低系统功耗、成本及复杂度;最后通过雷达实测数据验证本技术方案的有效性。

Aiming at contradiction between gapless range detection and high resolution range profile, a double pre-distortion technology of broadband signals based on single DDS source is proposed in this paper. After principle analysis, pre-distortion processes of online compensation of transmitting channel error and post-processing compensation of local oscillation channel error are described. Based on the processes, pre-distortion processing of double broadband signals can be performed to achieve gapless range detection and high resolution range profile simultaneously. In addition, the technology can reduce power consumption, cost and complexity of radar systems because it uses single DDS source. Finally, effectiveness of this technology is proved by experimental results.