CPC Class H04W

A first base station may be configured as an auxiliary receiver for a data stream sent on an uplink from a source device to a second base station. The second base station may be a base station that is engaged in conventional communications with the source device on uplink and downlink channels using a selected protocol. The first base station may be used to provide extra data redundancy/QoS for a data stream sent from the source device to a destination device through the second base station. The first base station may determine that it has available bandwidth and is able to serve as an auxiliary receiver. The first base station may be asked by the second base station to provide extra bandwidth when certain network conditions occur. The first base station may include a software defined radio (SDR) that may be configured to receive according to the selected protocol.

In a multi-user multiple antenna system, a central processor is communicatively coupled to a plurality of geographically distributed access points via a network. The central processor, the geographically distributed access points, or a plurality of client devices served by the system computes channel estimates of wireless channels between the geographically distributed access points and the client devices. The central processor computes access-point weights from the channel estimates to synthesize an antenna array from the plurality of geographically distributed access points, and the access-point weights are used to implement spatial multiplexing.

In a multi-user multiple antenna system, a central processor is communicatively coupled to a plurality of geographically distributed access points via a network. The central processor selects two or more of the distributed access points to serve each of a plurality of user devices based on signal power of wireless links between each user device and the distributed access points. The central processor performs subspace processing on the signals transmitted and/or received across the plurality of distributed access points for producing a plurality of non-interfering spatial subchannels.