Patent ID: 8477864
Filing Date: 2013-07-02
Classification: H04B,H04L

Abstract:
1. A communication method in which two complex-valued input symbols s 1 and s 2 having respective real and imaginary parts Re(s 1 ), Im(s 1 ), Re(s 2 ) and Im(s 2 ) are mapped to a block-code matrix S for subsequent transmission, the communication method comprising: constructing the block-code matrix S as a weighed sum of dispersion matrices A transmitting the block-code matrix S as a space-time signal matrix from an array of two or more antennas during two transmit symbol intervals; wherein the dispersion matrices are defined by and wherein the constructing of the block-code matrix S comprises selecting a value for α such that 0<α<1 to control a degree of beam-forming behavior by the antenna array, and further comprises selecting a value for φ based on an angular position of one of a user and a base station relative to the user to control a phase shift between two or more antennas of the array.