Compressive Sampling Coupled OFDM Technique for Testing Continuous Wave Radar
Testing continuous wave (CW) radar circuitry is a challenging and time consuming process that requires characterizing system response over a wide range of frequencies. Step frequency continuous wave (SFCW) functional test is widely adopted for CW radar through a large number of frequency tones generation and characterization. For an ultra-wideband radar system, SFCW testing can be very time consuming. In this paper, we propose a new approach to increase test speed at low cost and low design overhead by combining OFDM (Orthogonal Frequency Division Multiplexing) in conjunction with compressive sampling (CS) algorithm. In the test, OFDM is applied for multi-tone signal generation while compressive sampling is for frequency tone reduction. To show equivalent test performance, SFCW test and OFDM-CS test are both performed to characterize a sample ground penetrating radar (GPR). Simulation results are presented for validations.
compressive sampling ofdm testing radar sfcw