.pi./4 differential encoding for digital cellular mobile systems

Details .pi./4 differential encoding for digital cellular mobile systems .pi./4 differential encoding for digital cellular mobile systems

1992-08-21

1993-11-09

Grimm, Siegfried H.

Modulators

Phase shift keying modulator or quadrature amplitude modulator

375 56, 375 67, 332104, H04L 2720

Patent

active

052606732

ABSTRACT:
A .pi./4 differential phase shift encoder that is implemented by simple digital logic circuits or a small number of digital signal processor instructions. The hardware logic circuit which implements .pi./4 differential phase shift encoding first converts a serial input binary data stream with a serial-to-parallel converter into two separate binary sequences. These sequences are then applied to a .pi./4 differential encoder which employs a table lookup to generate the final .pi./4 differential phase shift encoding. The software implementation of the .pi./4 differential phase shift encoding technique generates the phase shift encoded signal using tables of values based on sequences of the input serial binary data stream.

REFERENCES:
patent: 4504802 (1985-03-01), Heatherington
patent: 5020076 (1991-05-01), Cahill et al.
patent: 5210775 (1993-05-01), Takahara et al.

Affiliated with

Also associated with

Rating

.pi./4 differential encoding for digital cellular mobile systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with .pi./4 differential encoding for digital cellular mobile systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and .pi./4 differential encoding for digital cellular mobile systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1145868