发明名称 COMPENSATION FOR MULTI-PATH INTERFERENCE USING PILOT SYMBOLS
摘要 A plurality of pilot symbols (176) are appended to a plurality of data symbols to form successive frames (170) that are modulated at a transmitter (64). The transmitted modulated signal is subject to loss of data due to simple fading and multi-path and simulcast interference. The received signals are demodulated by a receiver (74) and processed to provide a data signal comprising the data symbols (82) and a pilot signal comprising the pilot symbols (86). The data signal is delayed (90) for sufficient time to enable channel impulse response estimates to be made of successive blocks of pilot symbols (98), preferably using pilot symbol blocks that both precede and follow the data symbols in the frame being processed. The channel impulse response estimates for blocks of pilot symbols are buffered (102) and used by an interpolator (92) to determine an interpolated channel impulse response estimate (104) for each data symbol as a function of the pilot symbols and of predefined channel characteristics. The interpolated channel impulse response estimates are applied to successive data symbols in the delayed data signal, enabling the data to be decoded (108), compensating for fading and interference.
申请公布号 WO9601004(A1) 申请公布日期 1996.01.11
申请号 WO1994US07413 申请日期 1994.06.30
申请人 GLENAYRE ELECTRONICS, INC.;MARCHETTO, ROBERT, F.;STEWART, TODD, A.;HO, PAUL, KAR-MING 发明人 MARCHETTO, ROBERT, F.;STEWART, TODD, A.;HO, PAUL, KAR-MING
分类号 H04B7/005;(IPC1-7):H03D1/00;H04L27/06;H04B1/10;G06F11/10;H03M13/12 主分类号 H04B7/005
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