Adaptix Limited

Xun Shao

Guanbin Xing

Manyuan Shen

Systems and methods which implement cooperative random or quasi-random beam forming as between a plurality of base stations in a wireless network to reduce multi-cell interference are shown. For example, a plurality of base stations in a wireless network cooperate to provide frequency resources, such as channels, subchannels, subcarriers, etc., in a plurality of randomesque beams. In operation, subscriber stations preferably analyze signals as received on a plurality of the randomesque beams to determine one or more 'best' beams for use in communication between the subscriber station and base station. Assuming an identified beam is available for use by the subscriber station, payload communications may be provided using one or more beams identified by the subscriber station as a 'best' beam. The base stations of the wireless network preferably cooperate to periodically reform the randomesque beams.

Reducing multi-cell interference using cooperative random beam forming

Methods and systems for improved channel estimation that jointly consider interference contributions and noise contributions separately. Associated method involve measuring pilot channel signals at a receiver and then determining what component of the measured pilot channel signals are attributable to a serving BS and what component of the measured pilot channel signals are attributable to an interfering BS. This information is used to determine a product of the pilot channel signals attributable to the serving BS and the pilot channel signal attributable to the interfering BS, where the found product is used to estimate said channel.

Methods and systems for channel estimation in a wireless communication network

Systems and methods for intelligently switching between communication modes. An optimum communication mode is selected based upon determining the mobility of the subscriber station, the location of the subscriber station, and orthogonality of signals received from the subscriber station with respect to a signal of another subscriber station. Each determination may be continually or incrementally performed according to the passage of a time interval or upon observation of changes in relevant conditions.

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Bellevue, WA, United States of America

Xun Shao