Patent ID: 8937899
Filing Date: 2015-01-20
Classification: H04B

Abstract:
1. A method in a node for a cellular communication system of relaying respective first wireless signals from a plurality of mobile stations to a base station and a second wireless signal from the base station to the plurality of mobile stations, comprising: receiving the first and second wireless signals through at least two antennas in the node during a first time slot of two successive time slots, wherein each of the first wireless signals includes a respective symbol and the second wireless signals includes a plurality of symbols; generating respective estimates of the symbols in the first and second wireless signals received during the first time slot, wherein generating includes canceling interference between symbols based on respective first estimates of a channel characteristic of respective first communication channels between the mobile stations and the node and on a second estimate of a channel characteristic of a second communication channel between the base station and the node; generating a first relay signal based on the estimates of the symbols of the first wireless signals and a second relay signal based on the estimates of the plurality of symbols of the second wireless signal, wherein generating includes: precoding the estimates of the symbols in the first and second wireless signals received during the first time slot, wherein precoding includes amplifying estimates by a gain factor, and canceling interference between the symbols; providing the gain factor to the plurality of mobile stations; and providing the first estimates of the channel characteristic to the base station, wherein the gain factor is determined based on a channel estimate of a communication channel between the mobile stations and the node, a channel estimate of a communication channel between the node and the base station, and respective maximum transmit powers of the node and the base station.