Patent ID: 8929193
Filing Date: 2015-01-06
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting data streams from a base station system to a plurality of remote units each operable with despreading weights in a point-to-multipoint communication network said method comprising: converting each of the data streams into a plurality of signal vectors by mapping the data streams to a sequence of information symbols; selecting a unique preamble for each of the plurality of remote units; concatenating each unique preamble with the sequence of information symbols of the corresponding remote unit to form a plurality of concatenated signals corresponding to the plurality of signal vectors; spreading the plurality of concatenated signals to form composite spread signals using a plurality of base spreading weight vectors, wherein each base spreading weight vector corresponds to one of the plurality of remote units; and transmitting the plurality of composite spread signals to each of the corresponding plurality of remote units, wherein a transmit channel from the base station system to each of the plurality of remote units is a reciprocal of another transmit channel from each of the corresponding remote units to the base station system, and wherein spreading weights of the plurality of base spreading weight vectors are used to provide the despreading weights at each of the plurality of remote units.