Phase error detector for a quadrature amplitude modulated...

Details Phase error detector for a quadrature amplitude modulated... Phase error detector for a quadrature amplitude modulated...

2007-10-16

2007-10-16

Tran, Khanh (Department: 2611)

Pulse or digital communications

Receivers

Amplitude modulation

Reexamination Certificate

active

10018759

ABSTRACT:
The invention relates to a phase error detector which generates a phase correction signal in such a manner that the phase characteristic curve thereof does not have any undesired zero positions and comprises a finite steepness in the angular area around the engaging point. The inventive phase error detector (PFD) calculates the phase correction signal (S) according to the detected decision domain in accordance with a number of predetermined calculating methods. The phase error detector (PFD) attains such an allocation between the decision domains of the complex QAM single state plane and the individual calculating methods such that the static phase characteristic curve thereof does not have any additional zero positions apart from the engaging point.

REFERENCES:
patent: 4811363 (1989-03-01), Hoffmann
patent: 4958360 (1990-09-01), Sari
patent: 5042052 (1991-08-01), Roberts et al.
patent: 5504453 (1996-04-01), MacDonald et al.
patent: 5640417 (1997-06-01), Barabash et al.
patent: 5872812 (1999-02-01), Saito et al.
patent: 0 571 788 (1993-05-01), None
Hoffmann, M. H. W., “A New Carrier Regeneration Scheme for QAM Signals”, Proceedings of the International Symposium on Circuits and Systems, Jun. 7, 1988, pp. 599-602.

Affiliated with

Also associated with

Rating

Phase error detector for a quadrature amplitude modulated... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase error detector for a quadrature amplitude modulated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase error detector for a quadrature amplitude modulated... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3901830