| 摘要 |
<p>An RF receiver (101) converts RF signals into baseband signals, and matched filter correlator (301) correlates samples of the baseband signals with predetermined synchronization signals, such as long sync symbols, and provides corresponding correlation samples. A long-term integrator (305) integrates a first predetermined number of the correlation samples to provide a long term moving average LTMA and a short term integrator (307) integrates a second predetermined number of the correlation samples to provide a short term moving average STMA signal. The short term moving average signal is based on channel delay spread and the long term moving average tracks channel noise. A multiplier (309) multiplies the long term moving average signal by a scale factor TM to generate a dynamic threshold DT. A detector (311) detects a crossover between the short term moving average and the dynamic threshold to estimate timing of received synchronization signals.</p> |
