Multi-user multiple input multiple output radio communications

摘要

A radio communications system conducts radio communications using basic physical channels. Each basic physical channel defines a time slot and a radio frequency for transmission. Radio communication is established between a radio base station and multiple UEs over the same basic physical channel. Three or four subchannels are provided in the same basic physical channel to simultaneously support three or four full rate UE communications, seven or eight half rate UE communications, or other equivalent combinations. A first baseband transmitter chain can map full rate data corresponding to first and second full rate UE communications (or equivalent) as adaptive quadrature phase shift keying, AQPSK, signals onto a first and a second of the three subchannels. A second baseband transmitter chain can map full rate data corresponding to a third and/or fourth full rate UE communication (or equivalent) as phase shifted signals onto a third of the three subchannels.

主权项

1. A radio base station for a radio communications system that conducts radio communications over a radio interface using basic physical channels, where each basic physical channel defines a time slot and a radio frequency for transmission, comprising:
circuitry configured to establish radio communication between a radio base station and multiple full rate or half rate user equipments (UEs) over the same basic physical channel, where at least three subchannels are provided in the same basic physical channel that can simultaneously support three full rate UE communications, the circuitry including: a first baseband transmitter chain configured to map full rate data corresponding to first and second full rate UE communications as adaptive quadrature phase shift keying, AQPSK, signals onto a first and a second of the three subchannels, and a second baseband transmitter chain configured to map full rate data corresponding to a third full rate UE communication as rotated binary phase shift keying signals or as Gaussian minimum shift keying signals onto a third of the three subchannels, wherein the second baseband transmitter chain is configured to operate separate, but in parallel with, the first baseband transmitter chain.