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In this paper, we propose a precorrelation direction lock loop (DiLL) scheme and a new modification factor estimation method for the global navigation satellite system (GNSS) receivers. The proposed scheme executes spatial correlation before code demodulator and does not need to do code demodulation for every antenna element. It can decrease the number of code demodulator to 3 regardless of the array...
A six-beam switched beam antenna (SBA), whose beam patterns are shaped in the azimuth plane, is designed and fabricated. A synthesis method, which is based on a four-elements array and can generate a flat-top beam pattern with 46° flat gain region (gain fluctuation within $\pm \mathbf{0.5}\,\mathbf{dB}$), 60° 3-dB beam width, and less than $- \mathbf{20.1}\,\mathbf{dB}$ side lobe level (SSL), is proposed...
In this paper, we propose a Minimum Bit Error Rate (MBER) beamforming combined with Space-Time Block Coding (STBC) according to the number of antenna array. A class of adaptive beamforming algorithm has been proposed based on minimizing the BER cost function directly. Consequently, MBER beamforming is capable of providing significant performance gains in terms of a reduced BER. The beamforming weights...
This paper analyzes a method for the DOA estimation of correlated signals based on the integration of a SVM classifier and an iterative multi-scaling approach (IMSA). The aim of the SVM classifier is the definition of a probability map of the angular directions of incidence of the incoming signals starting from the knowledge of the correlation matrix of the antenna array, while the IMSA procedure...
It is recent researching hotspot to integrate multiuser detection with smart antenna for CDMA. In order to reduce the system complexity and manufacture cost, we must make a compromise between them. In this paper, the BER expressions of Rake receiver with parallel interference cancellation and antenna array in Rayleigh channels are derived for WCDMA. The impact of antenna number and cancellation stage...
A new adaptive beamforming method for direct sequence code division multiple access (DS-CDMA) communication systems is proposed, which has low computational load. The proposed method needs only 2N+1 complex multiplications and 2N-1 complex additions, where N is the number of antennas in the array. We evaluate the performance of the proposed method in estimating the angle-of-arrival (AOA) of the desired...
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