Patent ID: 6822998
Filing Date: 2004-11-23
Classification: H04B,H04L,H04W

Abstract:
A base station receiver in a CDMA (Code Division Multiple Access) mobile communication system, for measuring a signal-to-noise ratio (SNR) of a signal received at the base station over at least one of a plurality of channels in a mobile station transmitter, each of the plurality of the channels having a corresponding orthogonal code, said receiver comprising:a despreader for despreading the received signal with a complex despreading sequence; a noise power measurer for measuring noise power from the despread received signal provided from the despreader by removing signal power by using a noise power measurement orthogonal code which is orthogonal with at least one of the orthogonal codes of the plurality of the channels; a signal power measurer for measuring signal power from the despread received signal provided from the despreader; and an SNR measurer for measuring an SNR by receiving the noise power from the noise power measurer and the signal power from the signal power measurer.