Quadrature overlapping modulation system

Details Quadrature overlapping modulation system Quadrature overlapping modulation system

1993-07-29

1996-04-16

Chin, Stephen

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

375261, 375350, 36472412, 332103, H04L 2736

Patent

active

055090338

ABSTRACT:
A quadrature overlapping modulation method for modulating and shaping a baseband data sequence which has a data bit rate of 1/T. The method separates a baseband data sequence into an even bit data sequence to a first channel and an odd bit data sequence to a second channel, delaying by .tau.=T time the even bit data sequence and the odd bit data sequence relative to each other. After that, both the even bit data sequence and the odd bit data sequence are shaped in a waveform shaping filter. A carrier signal is generated and it modulates both the even bit data sequence and the odd bit data sequence. The data sequences are shaped with a combination of a triangular function and a trigonometric function or with a convolution function of two trigonometric functions before carrier modulation.

REFERENCES:
patent: 4613976 (1986-09-01), Sewerison et al.
patent: 4644565 (1987-02-01), Seo et al.
patent: 4730344 (1988-03-01), Saha

Affiliated with

Also associated with

Rating

Quadrature overlapping modulation system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Quadrature overlapping modulation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quadrature overlapping modulation system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-331338