On Efficient Echo Suppression with Phaseless Data in the Joint Frequency and Spatial Domain for Antenna Pattern Measurement in a Nonanechoic Chamber

In this communication, an echo suppression method is presented to recover the true antenna gain pattern measured in a nonanechoic environment based on phaseless measurement data. With the proposed technique, the antenna pattern convoluted with the multipath spatial profile can be extracted with a deconvolution operation based on the scalar frequency response measurement, which can be easily obtained with a spectrum analyzer. The proposed scheme is advantageous compared to complex-signal-based methods since it is a phaseless solution. Moreover, a generalized solution jointly exploiting the frequency (i.e., using wideband scalar frequency response measurement) and spatial (i.e., using several spatial samples) domain is proposed to further improve the pattern reconstruction accuracy, where the state-of-the-art spatial-domain and the proposed frequency-domain solutions can be seen as special cases. Numerical simulations as well as experimental measurement results demonstrated the feasibility and advantages of the proposed algorithm.