【摘 要】
：
时延估计的方法有经典的广义相关法、自适应法、循环平稳法、高阶累积量法、时频分析法等,重点分析了外辐射源雷达系统中用于时延估计的循环平稳法和相关法,并给出了循环平稳
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时延估计的方法有经典的广义相关法、自适应法、循环平稳法、高阶累积量法、时频分析法等,重点分析了外辐射源雷达系统中用于时延估计的循环平稳法和相关法,并给出了循环平稳法和相关法用于时延估计的仿真,得出了仿真结果。仿真结果表明,对QPSK信号无法用循环平稳的方法来进行时差的获取,用相关法在极低信噪比条件下检测出目标信号,长时间的信号积累是必需的。
The methods of time delay estimation include classic generalized correlation method, adaptive method, cyclic stationary method, high-order cumulant method, time-frequency analysis method, etc. The emphasis is put on the cyclostationary method for time-delay estimation in the external radiation source radar system And related law, and gives the simulation of cyclic delay method and correlation method for time delay estimation. The simulation results are obtained. The simulation results show that the QPSK signal can not be obtained by round-robin method, and the target signal can be detected by the correlation method under very low signal-to-noise ratio. It is necessary to accumulate long time signal.
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