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A novel coherent receiver for linear optical phase demodulation is proposed and experimentally demonstrated. The receiver, based on a broadband optical phase-lock loop has a bandwidth of 1.45 GHz. Using the receiver in an analog link experiment, a spurious free dynamic range of 125dBHz 2/3 is measured at 300 MHz. Further, theoretical investigations are presented demonstrating receiver operation at high frequencies (>2GHz) using a sampling phase -locked loop.

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Angle-of-arrival (AOA) estimation algorithms for electronic surveillance systems are often required to be accurate, computationally fast and implemented using sparse large aperture arrays. This paper considers the speed and accuracy of the SODA and SBI interferometers [1,2] in the context of sparse large aperture arrays and compares their performance to the conventional phaseshift beamformer and MUSIC algorithm. The performance of the algorithms will be compared through simulation and verified using experimental data.