Study on the signal processing of high-speed and wide-beam LFMICW radar altimeter

A signal processing method is presented in order to solve the problem of measurement error caused by wide terrain fluctuation within antenna´s wide beam and the range-velocity coupling problem caused by platform´s high velocity. A signal processing method and height detecting algorithm is proposed in this paper to implement height measurement. The beat spectrum is processed by intercepting and weighing to solve the measurement error problem mentioned above, and the coupling problem is solved by pairing between positive and negative sweeping frequency. Certain measurement accuracy is achieved by the method. The effectiveness of the method is validated through simulation results.