A new sensor array signal processing technique

A signal combination technique, based on the spectral replication property of sampling, is presented. The technique uses second-order bandpass sampling to provide some phase control over the component signals. Although the phase control is not independent between the signals and is further constrained by inherent amplitude scaling, quasi-independent control can be achieved. The performance of the combination technique is established for two applications. These applications are diversity antenna combination and demodulation of slow frequency-hopping spread spectrum