Patent ID: 7420945
Filing Date: 2008-09-02
Classification: H04B,H04L

Abstract:
1. Transmitting apparatus which transmits a data signal to a receiving apparatus via at least two different transmission paths, comprising: an antenna array; a transmitter array connected to the antenna array; a plurality of adders connected to the transmitter array; and a plurality of beamformers connected to the adders, each beam former being configured to operate under control of a weight control unit, which receives angle of arrival signals being estimates of the angles of arrival of signals received from the receiving apparatus, and being configured to receive a respective transmission signal representing a same data signal and to modify the respective transmission signal by splitting the signal into a plurality of separate signals, and multiplying each signal by a complex value being a beamformer weight to form a plurality of digital baseband signals, which are added to the corresponding outputs of the other beamformers in the adders, such that the antenna array produces a plurality of directional transmission beams carrying respective transmission signals which are transmitted via different transmission paths to the receiving apparatus; and a space-time encoder which applies respectively different space-time coding to the same data signal thereby to produce space-time encoded transmission signals for transmission by the respective transmission beams.