Method and circuit for adaptive control of the bandwidth of...

Details Method and circuit for adaptive control of the bandwidth of... Method and circuit for adaptive control of the bandwidth of...

2005-01-27

2008-10-28

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S327000, C375S376000

Reexamination Certificate

active

07443929

ABSTRACT:
A method for adaptively controlling bandwidth of a carrier recovery loop in radio transmission systems, wherein the phase error in a PLL is adjusted to a minimum level by means of a loop filter incorporated in said PLL. The phase noise value in the local oscillator is determined and the value of the additive white gaussian noise in the PLL is estimated. Next these values are applied in a predetermined mathematical relationship indicative of the phase error in said PLL in such a manner that the desired wavelength of the PLL can be determined by corresponding to a minimum value of the phase error.

REFERENCES:
patent: 3876939 (1975-04-01), Lerner
patent: 2005/0129142 (2005-06-01), Yellin et al.
patent: 1 115 237 (2001-07-01), None
patent: WO 01/80511 (2001-10-01), None
T. Oellermann et al, “Performance evaluation of a coded CDMA optical system”, Military Communications Conference, 1996, Milcom '96, Conference Proceedings, IEEE, Mclean VA, Oct. 21-24, 1996, NY—IEEE—Oct. 21, 1996, pp. 0-8-912, XP010204032.

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