Interference estimation for wireless communication

摘要

Interference on pilot signals and on data tones can be mismatched. Different types of interference estimates perform differently based on how the mismatch occurs. The resulting interference estimate may thus be inaccurate. Interference estimates based on pilot signals and also on data tones can both be evaluated for reliability. The more reliable of the two can then be selected. If the data tones estimate is selected, the estimate can be calculated from covariance matrices or from traffic-to-pilot ratios.

主权项

1. A method of wireless communication in a wireless network, the method comprising:
computing a first interference estimate based on common reference signal tones; computing a second interference estimate based on data tones by:
estimating a traffic-to-pilot ratio over data tones of colliding interferers, andcomputing an interference estimate based on the traffic-to-pilot ratio; selecting one of the first interference estimate or the second interference estimate based on a reliability determination of the first interference estimate and the second interference estimate; performing a soft cancellation of data transmitted by a serving cell at a symbol level or at a codeword level; and estimating the traffic-to-pilot ratio of colliding interferers after cancellation of the data transmitted by the serving cell.