Pulse or digital communications – Transmitters – Angle modulation
Reexamination Certificate
2006-09-12
2006-09-12
Tse, Young T. (Department: 2611)
Pulse or digital communications
Transmitters
Angle modulation
C375S308000, C332S100000, C332S103000
Reexamination Certificate
active
07106807
ABSTRACT:
A method for estimating the frequency shift of a CPFSK signal includes scanning the CPFSK signal. Intermediate signal values are determined for the scanned CPFSK signal. An estimated value (ν) is determined for the frequency shift of the CPFSK signal by assessing a predefined number of L0consecutive intermediate signal values. An integer delay parameter D is specified. Intermediate signal values for intervals k·T+τ are determined in each case from scanning values of the CPFSK signal obtained for intervals k·D·T+τ and [k−1]·D·T+τ, whereby T designates a scanning period of the scanned CPFSK signal, k is a scanning index and τ is a delay constant. The estimated value (ν) for the frequency shift is determined from the intermediate signal values for intervals i·D·T+τ with i=0 . . . L0−1. The integer delay parameter D is variable and is selected depending on the type of CPFSK modulation used for the CPFSK signal.
REFERENCES:
patent: 4414675 (1983-11-01), Comroe
patent: 4890302 (1989-12-01), Muilwijk
patent: 5253097 (1993-10-01), Naito et al.
patent: 5825257 (1998-10-01), Klymyshyn et al.
patent: 6272072 (2001-08-01), Wulich et al.
patent: 6411646 (2002-06-01), Walley et al.
patent: 6546237 (2003-04-01), Glas
patent: 6829317 (2004-12-01), Mege et al.
patent: 2003/0043947 (2003-03-01), Zehavi et al.
patent: 57131153 (1982-08-01), None
patent: 63160448 (1988-07-01), None
D'Andrea, A.N. et al.; “Digital Carrier Frequency Estimation For Multilevel CPM Signals”, Jun. 18, 1995, pp. 1041-1045.
Morelli, M. et al., “Feedforward Carrier Frequency Estimation With MSK-Type Signals”,IEEE Communications Letters, vol. 2, No. 8, Aug. 1998, pp. 235-237.
Caire, Giuseppe et al., “A New Symbol Timing And Carrier Frequency Offset Estimation Algorithm For Noncoherent OrthogonalM-CPFSK”,IEEE, Oct. 1997, pp. 1314-1326.
Umberto Mengali and Aldo N. D'Andrea; Synchronization Techniques for Digital Receivers; p. 177; Plenum Press, New York and London.
Holme Roberts & Owen LLP
Infineon - Technologies AG
Lillywhite Jeffery M.
Seeley, Esq. David O.
Tse Young T.
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