Patent ID: 7162210
Filing Date: 2007-01-09
Classification: H04B

Abstract:
1. A method of antenna array pattern forming in a multipath signal receiving environment in which a weight vector is formed for every path for which purpose the input signal is periodically demodulated at antenna array elements, a current value of the weight vector, being directly linked to an antenna array pattern, is determined by the steps of: a) prior to demodulation of a received signal, determining time positions of path signals; b) generating elements of a correlation matrix of the received signal at the antenna array elements by averaging possible pairproducts of the received signals at the antenna array elements within a sliding window interval; c) correcting a correlation matrix of the received signal at the antenna array elements and incrementing leading diagonal elements, thereby introducing artificial white Gaussian noise at an output of the antenna array elements; d) determining for each path, weight vectors for which it is necessary to determine decision function values; e) upon demodulation of the input signal, generating pilot signal complex correlation responses of the antenna array elements; f) forming the pilot signal complex correlation response at the output of the antenna array elements for each weight vector by summing products of the pilot signal complex correlation responses of the antenna array elements and the weight vectors corresponding to these elements; g) determining the power of the pilot signal complex correlation response at the output of the antenna array elements by summing squared inphase and quadrature phase components of the pilot signal complex correlation response at the output of the antenna array elements; h) determining artificial noise at the output of the antenna array elements by forming a quadrature form of the weight vector generated by the corrected correlation matrix of the received signal at the antenna array elements; i) generating a decision function value by determining a power ratio of the pilot signal complex correlation response at the output of the antenna array elements to the power of the received signal and the artificial white Gaussian noise at the output of the antenna array elements; j) determining a current weight vector value as a vector corresponding to a maximum decision function value.