发明授权
US08565324B2 Communications device using measured signal-to-noise ratio to adjust phase and frequency tracking 失效
通信设备使用测量的信噪比来调整相位和频率跟踪

Communications device using measured signal-to-noise ratio to adjust phase and frequency tracking
摘要:
A communications device includes a phase and frequency tracking loop having a signal input and adjustable loop filter that establishes a predetermined tracking loop bandwidth for samples of communication signals received at the signal input and processed within the tracking loop. A tracking loop update circuit updates the loop filter operating parameters. It is operative with the loop filter for increasing or decreasing the tracking loop bandwidth of the phase and frequency tracking loop based on the measured signal-to-noise ratio in the received samples of communication signals at the signal output by the tracking loop and on the known or measured apriori tracking capabilities of demodulator based on the symbol rate of communication signal.
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