Pulse or digital communications – Receivers – Angle modulation
Patent
1996-07-02
2000-02-29
Pham, Chi H.
Pulse or digital communications
Receivers
Angle modulation
375365, H04L 2714
Patent
active
060318805
ABSTRACT:
A method of carrier recovery in a wireless communications system using a known synchronization word, for example an IS-54 TDMA system, operates in two stages to produce an estimate of carrier phase. In the first stage, a complex fading factor, embodying carrier phase information, is estimated from the synchronization word in the received signal using a least square criterion. In the second stage, the carrier phase is estimated from this complex fading factor by averaging. The averaging can provide a recursive average or a moving average, or can be implemented using Kalman filtering which also provides an estimated amplitude factor and frequency shift. The method and apparatus provide a substantial improvement over phase locked loop carrier recovery.
REFERENCES:
patent: 5151925 (1992-09-01), Gelin et al.
patent: 5165051 (1992-11-01), Kumar
patent: 5233632 (1993-08-01), Baum et al.
patent: 5249205 (1993-09-01), Chennakesku et al.
patent: 5337331 (1994-08-01), Sadot et al.
patent: 5432816 (1995-07-01), Gozzo
patent: 5432821 (1995-07-01), Polydoros et al.
patent: 5475710 (1995-12-01), Ishizu et al.
patent: 5500876 (1996-03-01), Nagata
patent: 5596608 (1997-01-01), Sassa et al.
patent: 5848060 (1998-12-01), Dent
Ho et al., "On Pilot Symbol Assisted Detection of MSK and GTFM in Fast Fading Channels", Proceedings of the Global Telecommunications Conf., vol. 2, (1994) pp. 967-972.
Abu-Dayya Adnan
Bakouline Mikhail
Chloma Alexandre
Kreindeline Vitali
Li Yong
Bayard Emmanuel
Nortel Networks Corporation
Pham Chi H.
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