Patent ID: 6192238
Filing Date: 2001-02-20
Classification: H04B,H04L

Abstract:
A receiving method for a receiver (10-13) of a digital cellular radio system, the receiver employing Viterbi detection and diversity reception, the method involving forming an estimated impulse response of a channel, and the estimated impulse response of the channel as well as the predetermined sequence (53) comprised in the signal being symbol sequences, characterized by the steps offorming a reference signal from the estimated impulse response of the channel and the predetermined sequence (53) within the signal,computing as a variance type computation the energy of noise associated with the signal from the reference signal and the predetermined sequence (53) received from the channel,computing the SNR as a ratio between the reference signal energy and the noise energy, andcombining the diversity branch symbols which temporally correspond with one another, and weighting the outputs of the adapted filters (25) in each branch and the autocorrelation taps in the impulse response by the SNR of each branch.