COMMUNICATION SYSTEM AND METHOD USING SIGNAL TO NOISE RATIO ESTIMATION FOR SCALING IN PROCESSING RECEIVED WIRELESS COMMUNICATIONS SIGNALS

摘要

A SYSTEM, COMPONENTS AND METHODS PROVIDE FEC DECODING IN A WIRELESS COMMUNICATION SYSTEM IN WHICH SIGNAL TO NOISE RATIO ESTIMATION IS USED FOR SCALING INFORMATION CAPTURED BY A DEMODULATOR (14) IN PROCESSING RECEIVED WIRELESS COMMUNICATION SIGNALS. A PREFERRED WIRELESS TRANSMIT RECEIVE UNIT (WTRU) HAS A CHANNEL RATE ESTIMATION DEVICE (25) CONFIGURED TO PROCESS THE RECEIVED COMMUNICATION SIGNALS FOR THE PARTICULAR COMMUNICATION CHANNEL AND TO PRODUCE CHANNEL CHANGE RATE ESTIMATES. A SIGNAL TO NOISE RATIO (SNR) ESTIMATION DEVICE (16) OF THE WTRU IS CONFIGURED TO PRODUCE SNR ESTIMATES BASED ON OBSERVATION WINDOWS OF A CALCULATED NUMBER OF SAMPLES OF THE RECEIVED SIGNAL WHERE THE NUMBER OF SAMPLES USED FOR EACH OBSERVATION WINDOW IS CALCULATED BY AN OBSERVATION WINDOW SELECTION DEVICE (25) AS A FUNCTION OF THE CHANNEL CHANGE RATE ESTIMATES PRODUCED BY THE CHANNEL RATE ESTIMATION DEVICE (23).(FIG 3)