06108374 is referenced by 158 patents and cites 4 patents.

A system and method to measure channel quality in terms of signal to noise ratio for the transmission of coded signals over fading channels. A Viterbi decoder metric for the Maximum Likelihood path is used as a channel quality measure. This Euclidean distance metric is filtered in order to smooth out short term variations. The filtered or averaged metric is a reliable channel quality measure which remains consistent across different coded modulation schemes and at different mobile speeds. The filtered metric is mapped to the signal to noise ratio per symbol using a threshold based scheme. Use of this implicit signal to noise ratio estimate is used for the mobile assisted handoff and data rate adaptation in the transmitter.

Title
System and method for measuring channel quality information
Application Number
8/921454
Publication Number
6108374
Application Date
August 25, 1997
Publication Date
August 22, 2000
Inventor
Richard P Ejzak
Wheaton
IL, US
Srinivas R Kadaba
Chatham
NJ, US
Sanjiv Nanda
Plainsboro
NJ, US
Krishna Balachandran
Middletown
NJ, US
Agent
Wildman Harrold Allen & Dixon
Agent
Carmen B Patti
Assignee
Lucent Technologies
NJ, US
IPC
H04Q 1/20
H04B 3/46
H04B 17/00
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