Patent ID: 6317612
Filing Date: 2001-11-13
Classification: H01Q,H04B

Abstract:
A method for determining by direct calculation from sampling values measured in an upward direction at the base station, subscriber station-specific spatial covariance matrices of transmission channels between a central station and a predetermined number of subscriber stations of a communication system, wherein the central station includes an antenna consisting of several individual sensors, the method comprising the following steps:transmitting data sequences respectively from said subscriber stations to said central station via said transmission channels, each of said data sequences containing a known data sequence component;chronologically sampling values of the individual sensors at the central station and compiling the sampled values as a predetermined number of reception vectors;determining a channel impulse response for each subscriber station for a transmission path between each subscriber station and each individual sensor of the antenna, dependant on said predetermined number of reception vectors and the reception known data sequence components, without implementing a direction estimate; andfor each subscriber station, correlating at least two channel impulse responses which correspond to transmission paths between said subscriber station and two of the individual sensors of the antenna and assigning the two channel impulse responses to a column number and a row number of a spatial covariance matrix for said subscriber station.