| 摘要 |
A transmitter (10) which includes a quadrature phase shift keying (QPSK) modulator (14), and a receiver (20) which includes a pilot correlation filter (PCF) (23), a data matching filter (DMF) (22), a timing recovery mechanism, a sampler (24), and a QPSK demodulator (26) are provided in a wireless communication system. The transmitter (10) transmits a frame of data symbols and pilot symbols (frame) to a receiver in a wireless system. The QPSK modulator (14) modulates the frame. At the receiver (20), the PCF (23) recovers the pilot symbols, whereas the timing recovery mechanism tracks the timing of the pilot symbols in the frame. The DMF (22) enhances the multipath response of the received frame at known time intervals of the pilot symbols, and output a plurality of enhanced peaks. The sampler (24) samples the multipath response of the received frame at each of the enhanced peaks. The QPSK demodulator (26) demodulates the sampled frame and recovers the data symbols using QPSK demodulation based on the sampled frame.
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