Long time integration is a common mode in MIMO ( multiple-input multiple-output) radar.But the accumulation effect is seriously affected by range migration.To solve the problems mentioned above, this paper formulated the accumulation output changing with target velocity, bandwidth and other factors based on moving target echo model in MIMO radar.It quantificationally analyzed the relation between range migration and its influence factors.This formula can be used to determine target velocity on which motion compensation is essential, together with appropriate parameters such as transmission bandwidth selected to ensure range migration has the least influences on accumulation output.The validity of this theory is verified by simulation results.%长时间积累是MIMO(多输入多输出)雷达最常用的工作模式,而包络走动会严重影响积累效果.针对上述问题,推导出基于MIMO雷达运动目标回波模型的积累输出与目标速度、信号带宽等关键因素的表达式,定量说明了包络走动与其影响因子之间的关系.该表达式可用于确定需要进行包络补偿的目标速度范围,并通过发射带宽等参数的优选,使包络走动对积累效果的影响最小.仿真结果验证了理论分析的有效性.
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