Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2006-04-11
2006-04-11
Vanderpuye, Kenneth (Department: 2638)
Pulse or digital communications
Transmitters
Antinoise or distortion
Reexamination Certificate
active
07027523
ABSTRACT:
Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.
REFERENCES:
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5265119 (1993-11-01), Gilhousen et al.
patent: 5784363 (1998-07-01), EngstrÖm et al.
patent: 5799005 (1998-08-01), Soliman
patent: 5903554 (1999-05-01), Saints
patent: 6097972 (2000-08-01), Saints et al.
patent: 6131016 (2000-10-01), Greenstein et al.
patent: 6144711 (2000-11-01), Raleigh et al.
patent: 6707808 (2004-03-01), Vedrine
patent: 6778612 (2004-08-01), Lozano et al.
patent: 6792049 (2004-09-01), Bao et al.
patent: 0108369 (2001-02-01), None
Keller, et al. “Sub-Band Adaptive Pre-Equalised OFDM Transmission” 1999 IEEE Vehicular Technology Conference vol. 1 (50): 334-338 (Sep. 9, 1999).
Rohling et, al. “Adaptive Coding and Modulation in an OFDM-TDMA Communication System” 1998 IEEE Vehicular Technology Conference 773-776 (May 18, 1998).
Münster, et al. “Co-Channel Interference Suppression Assisted Adaptive OFDM in Interference Limited Environments” 1999 IEEE Vehicular Technology Conference vol. 1 (50): 284-288 (Sep. 9, 1999).
Jalali Ahmad
Smee John E.
Wallace Mark
Kim Kevin
Milikovsky Dmitry R.
Minha Sandip S. (Micky)
Qualcomm Incorporated
Vanderpuye Kenneth
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