Telefonaktiebolaget Lm Ericsson (publ)

Jafar Rostamy

Anders Engman

Peter Wahlstr&ouml;m

Aref Darvish

Johan Von Perner

A radio receiver improves audio quality by eliminating the audio clicks caused by fading conditions. The receiver detects the presence of the fading condition based on a large phase variation of a faded received signal during a time interval. When a fading condition is detected, the radio receiver reduces the large phase variation associated with the received signal to eliminate the audio clicks.

Method and apparatus for eliminating audio clicks in a radio receiver

A method is described of measuring the burst quality of a received signal. Specifically, the impairment correlation matrix, used to provide an estimate of impairment correlation properties for use in demodulating radio signals received by a plurality of antennas, is used to obtain the parameters necessary to obtain measurements of the burst quality, with respect to the signal to noise ratio and the signal to interferer ratio respectively. Specific algorithms for calculating the burst quality are also disclosed.

Method and apparatus for measuring signal quality in a wireless communication system

Detection of in-band noise in a radio communications voice channel is provided by mixing a signal having a known frequency into a radio signal containing a voice channel signal in an in-band range, thereby translating the voice channel signal out of the in-band range. The in-band range is thereafter examined for the presence of noise signal energy whose presence can be indicative of in-band noise. Squelching of the voice channel is provided in the event that in-band noise energy exceeds a predetermined threshold.

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Solna, Sweden

Jafar Rostamy