Patent ID: 6301291
Filing Date: 2001-10-09
Classification: H04L

Abstract:
A wireless communication system, comprising:a transmitter transmitting a frame of data symbols and pilot symbols, where the pilot symbols are inserted in the frame at known time intervals;a QPSK modulator modulating the frame of data symbols and pilot symbols using quadrature phase shift keying (QPSK) modulation;a receiver receiving the frame of data symbols and pilot symbols from the transmitter;a pilot correlation filter recovering the pilot symbols and providing a multipath response of the frame of data and pilot symbols at the known time intervals of the pilot symbols;data matching filter enhancing the multipath response and providing an enhanced multipath response with a plurality of enhanced peaks;a sampler sampling the enhanced multipath response at each of the enhanced peaks and producing a sampled and enhanced multipath response; anda QPSK demodulator demodulating the sampled frame of data and pilot symbols and recovering the data symbols using quadrature phase shift keying (QPSK) demodulation based on the sampled and enhanced multipath response.