Channel estimation and interference cancellation for virtual MIMO demodulation

摘要

A method and system for wireless communication in a wireless communication network. The wireless communication network has a first mobile terminal and a second mobile terminal arranged in virtual multiple input, multiple output (“V-MIMO”) communication with a base station. A first wireless communication uplink channel corresponding to the first mobile terminal is estimated. The estimate is based on a first reference symbol signal and the cancellation of interference from a second reference symbol signal received from the second mobile terminal. A second wireless communication uplink channel corresponding to the second mobile terminal is estimated. The estimate is based on the second reference symbol signal and the cancellation of interference from the first reference symbol signal received from the first mobile terminal. The estimated first wireless communication uplink channel is used to demodulate a first data signal received from the first wireless device, and the estimated second wireless communication uplink channel is used to demodulate a second data signal received from the second wireless device.

主权项

1. A method for operating a base station as part of a wireless communication network, the wireless communication network having a plurality of mobile terminals arranged in virtual multiple input, multiple output (“V-MIMO”) communication with the base station, the method comprising:
receiving, at the base station, a composite signal in response to transmissions of respective uplink reference signals from the respective mobile terminals, wherein the composite signal includes a superposition of signal components corresponding respectively to the uplink reference signals, wherein each of the signal components is a result of a first distorting action of a respective channel on the respective uplink reference signal transmitted from the respective mobile terminal, with the respective channel being between the respective mobile terminal and the base station; receiving, at the base station, response signals in response to transmissions of respective sounding reference signals (SRSs) from the respective mobile terminals, wherein each of the response signals is a result of a second distorting action of the respective channel on the respective sounding reference signal transmitted from the respective mobile terminal; and determining, at the base station, channel estimates for the mobile terminal based at least on the composite signal and the response signals.