一种基于时频匹配的长时间相干积累器设计

Processor design for long-time coherent integration based on time-frequency matching

对回波信号进行长时间相干积累是实现雷达威力增程的重要手段。为补偿目标匀加速运动对回波相干性的破坏并提高相干积累处理的时效性,首先提出一种基于时频域匹配处理的长时间相干积累方法,该方法可避免目标多普勒模糊的影响,实现对目标速度和加速度的补偿;其后,给出了基于时频域匹配的长相干积累处理器运动补偿通道间隔的定量化设计技术,并提出了采用多片通用图形计算卡的积累器并行优化实现方法。此外,还研究了静止轨道卫星相对地面雷达站的运动规律,并针对此类目标的长时间相干积累探测进行了并行化设计实现,从而验证了方法的有效性和实用性。

Long-time coherent integration of radar echoes is an important way to improve the radar perform- ance. A processor for long-time coherent integration based on time-freeluency matching is designed to compen- sate the effect caused by the velocity and acceleration of a target. This method can avoid the influence of Doppler ambiguity. Then the channel interval of the motion compensation is designed quantitatively and the parallel opti- mization for the processor is discussed using multiple graphic processing units. Moreover, the motion rule of a geostationary orbit ohiect with respect to a ground radar station is shown. Considering the motion rule, the par- allel design of the relative processor is given to demonstrate the effectiveness and practicality of the proposed method