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We propose two methods of nullsteering for a compact analog uniform circular array system. One method is based on switched beam. The predefined null patterns were generated by nullsteering algorithms and saved in the array system. The second method is based on adaptive array. A single channel receiver and A/D converter were added to the analog array output for adaptive array processing. Therefore,...
This paper presents the design of a compact uniform circular antenna array system used in conjunction with the RT-1944/U radio and reports the obtained experimental results. The proposed system was primarily designed to increase the communications range between Littoral Combat Ship (LCS) sea frames and Mission Package Unmanned Surface Vehicles (USVs) by developing a modular aerostat communications...
Beamforming is an array processing technique that is applicable for either radiation or reception. In receiving beamforming an array collects spatial samples of impinging waveforms, and then a set of carefully calculated weights are applied to the multi-channel data to separate the desired signal from unwanted interference. In this paper we describe a sequential beamspace beamforming method using...
This paper presents an experimental evaluation of a novel and innovative sequential beamspace (SBS) smart antenna system. The system is capable of accurate direction of arrival (DOA) estimation in beamspace and efficient element space beamforming. Moreover, the robust functionality of such a system includes high resolution radio frequency (RF) emitter DOA estimation and beamforming in a noisy environment...
We have developed a sequential beamspace method for high resolution direction of arrival (DOA) estimation. Beamspace MUSIC and element space MUSIC DOA estimation algorithms have been implemented to utilize an 8 element uniform circular array operating at 5.8 GHz. The simulation and initial lab results show that the proposed method can achieve good accuracy once it is properly sychronized. In addition,...
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