MULTIUSER TIME-REVERSAL DIVISION MULTIPLE ACCESS UPLINK SYSTEM WITH PARALLEL INTERFERENCE CANCELLATION

摘要

In a time-reversal wireless system, a transceiver receives a combined signal that includes signals from a plurality of devices, each device sending a signal to the transceiver through multiple wireless propagation paths. Signals sent from each of the devices are estimated based on the combined signal and a signature waveform associated with the device. Interference associated with the estimated signal from each of the devices is determined based on the estimated signals from the devices. The signal sent from each of the devices is determined by subtracting the interference associated with the estimated signal associated with the device from the estimated signal associated with the device.

主权项

1. A method comprising:
at a transceiver, receiving a combined signal that includes a first signal from a first device and a second signal from a second device, the first signal sent from the first device to the transceiver through first multiple wireless propagation paths, the second signal sent from the second device to the transceiver through second multiple wireless propagation paths, each of the first and second signals includes a plurality of symbols; generating a first set of estimated symbols based on the combined signal and a first location-specific signature waveform associated with the first device, the first set of estimated symbols representing a rough estimate of the symbols sent from the first device; generating a second set of estimated symbols based on the combined signal and a second location-specific signature waveform associated with the second device, the second set of estimated symbols representing a rough estimate of the symbols sent from the second device; determining interference based on at least one of the first set of estimated symbols or the second set of estimated symbols; and generating a refined first set of estimated symbols by canceling the interference from the first set of estimated symbols, the refined first set of estimated symbols representing a refined estimate of the symbols sent from the first device.