Load estimation for cell stability in interference whitening systems

摘要

A noise rise estimation method calculates (230) a noise rise measure suitable for stability control purposes, based at least on a useful signal power for the first user after interference whitening, a first user noise floor compensation factor, a code power to interference ratio measure for the first user, a noise floor measure and an estimated neighbour cell interference power. These factors are provided by measuring (210) received total wideband power and generating (212) a measure of an own cell power. An estimate of the noise floor measure is computed (214) and the neighbour cell interference power is estimated (216) based on these measurements and generated measures. An interference whitening is performed (220). The useful signal power for the first user after interference whitening is determined (222). The first user noise floor compensation factor is derived (224) based on combining weights for the first user used in for the first user is obtained (226).

主权项

1. A method for noise rise estimation in a wireless communication system, said method comprising:
measuring received total wideband power a plurality of times; generating a measure of an own cell power a plurality of times; computing an estimate of a noise floor measure based on at least a number of said measured received total wideband powers and said generated measures of an own cell power; estimating a neighbour cell interference power for a first user based on at least a number of said measured received total wideband powers and said generated measures of an own cell power; performing an interference whitening based on one of GRAKE and chip equalization, for said first user; determining a useful signal power for said first user after interference whitening; deriving a first user noise floor compensation factor based on combining weights used for said first user in said interference whitening; obtaining a code power to interference ratio measure for said first user; and calculating a noise rise measure for said first user, based at least on said useful signal power for said first user after interference whitening, said first user noise floor compensation factor, said code power to interference ratio measure for said first user, said noise floor measure and said estimated neighbour cell interference power.