Patent ID: 9226249
Filing Date: 2015-12-29
Classification: H04B,H04W

Abstract:
1. A receiver comprising a fast power control unit, said fast power control unit being arranged to continuously control a quality measure of a radio channel, wherein the quality measure is a modified Signal to Interference plus noise ratio (SIR) in which an influence from self interference has been removed, wherein the fast power control unit comprises a processing unit comprising a model of the radio channel determined at least based on known, demodulated pilots, said model comprising a self interference impairment term R the processing unit is arranged to adapt values of the first and second fitting parameters A, B to fit the model to measured received pilots, the processing unit is arranged to determine that the radio channel has a high Carrier to Interference ratio and is a dispersive channel, thus requiring determination of the modified SIR; the processing unit is arranged to determine the modified SIR as a relation between a signal power, the second fitting parameter B and the noise impairment term R the processing unit is arranged to determine when the first fitting parameter A decreases below a preset value, and thereupon set the first fitting parameter A to zero, re-estimate the value of the second fitting parameter B, and use the re-estimated second fitting parameter B in determining the modified SIR; wherein the receiver further comprises a RAKE receiver operatively connected to the fast power control unit and arranged to feed known pilots from the respective finger outputs of the RAKE receiver to the fast power control unit; wherein the RAKE receiver comprises at least one finger output for each significant fading path in the radio channel; and wherein the number of finger outputs of the RAKE receiver fed to the fast power control unit is larger than the number of finger outputs fed to a RAKE combiner for data processing.