Methods and apparatus for symmetrical phase-shift keying

Details Methods and apparatus for symmetrical phase-shift keying Methods and apparatus for symmetrical phase-shift keying

2004-11-23

2008-12-23

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Transmitters

Angle modulation

C375S329000, C375S332000, C375S302000, C375S330000, C375S324000, C375S331000, C375S316000, C329S308000, C329S304000

Reexamination Certificate

active

07469022

ABSTRACT:
Methods and apparatuses employing symmetrical phase-shift keying (SPSK) for data modulation and demodulation. Each symbol in a transmission signal carries n-bit information and is transmitted with one of 2n+1directions. Half directions among the 2n+1directions are regarded as default directions and the remaining are regarded as complementary directions. Each default direction has a corresponding complementary direction with a phase difference of π and representing the same n-bit information as the default direction. The phase difference between any two successive symbols after modulation is less than or equal to π/2.

REFERENCES:
patent: 4760344 (1988-07-01), Takase et al.
patent: 4933958 (1990-06-01), Brandl et al.
patent: 5642384 (1997-06-01), Ramesh
patent: 2004/0076047 (2004-04-01), Cho et al.
patent: 2005/0008101 (2005-01-01), Kazi et al.
patent: 2005/0135507 (2005-06-01), Chang et al.
“Trellin-Coded Modulation with Redundant Signal Sets Part I: Introduction” Ungerboeck; Feb. 1987.
“Trellis-Coded Modulation with Redundant Signal Sets Part II: State of the Art” Ungerboeck; 1987.
“Design and Performance of Precompensated Frequency Modulation (PFM) for use with a Quasi-Synchronous CDMA Return Link” Crozier, et al.
“Nachricktenubertragung” Kammeyer; 1993.

Affiliated with

Also associated with

Rating

Methods and apparatus for symmetrical phase-shift keying does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus for symmetrical phase-shift keying, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for symmetrical phase-shift keying will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4026466