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A procedure has been recently developed that computes the optimal sensors coordinates of the ambiguity-free antenna array for omnidirectional direction of arrival estimation. The procedure has an exponential complexity, motivating the simplification presented in this paper. This is made possible by exploiting some experimental observations, namely the fact that the optimal omnidirectional array has...
In this letter, we present an efficient method for blind adaptive beamforming with cyclostationary signals. In comparison with the SCORE algorithms of Agee et al. (Proc. IEEE, vol. 78, no. 4, pp. 753-767, Apr. 1990), the proposed method achieves better performance than the LS-SCORE algorithm due to using a subspace projection. Moreover, the proposed method requires significantly less computational...
As the users call for the improvement of the datarate in GPRS system, so far an adaptive antenna implemented at base station is envisaged to be the solution. However, this concept introduces the problems of high expense and complexity. Alternatively, a switched beam antenna avoiding those impairments is worthwhile considering. Therefore, this paper investigates into the use of switched beam antenna...
This paper studies efficient complex valued matrix manipulations for multi-user STBC-MIMO decoding. A novel method called Alamouti blockwise analytical matrix inversion (ABAMI) is proposed for the inversion of large complex matrices that are based on Alamouti sub-blocks. Another method using a variant of Givens rotation is proposed for fast QR decomposition of this kind of matrices. Our solutions...
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