Determining a detection signal in a spread spectrum...

Details Determining a detection signal in a spread spectrum... Determining a detection signal in a spread spectrum...

2011-05-24

2011-05-24

Payne, David C. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

Reexamination Certificate

active

07949036

ABSTRACT:
Disclosed is a method of generating a detection signal for detecting energy in a spread-spectrum signal, comprising: de-spreading the spread-spectrum signal by applying a predetermined spreading code to obtain a sequence of de-spread signal symbols (202A-202D); accumulating a number of said signal symbols to obtain a single detection signal. The accumulation includes: obtaining a first and a second subset of said de-spread signal symbols, wherein the symbols of the first subset have values that are known to the receiver or at least known to be the same for all symbols of the first subset, and wherein the symbols of the second subset have unknown values; coherently accumulating the symbols of the first subset to obtain a first partial detection signal (203A,203B,203C); non-coherently accumulating the symbols of the second subset to obtain a second partial detection signal (204A,204B,204C); and combining the first and second partial detection signals to obtain the single detection signal (208).

REFERENCES:
patent: 6661833 (2003-12-01), Black et al.
patent: 6668011 (2003-12-01), Li et al.
patent: 7295597 (2007-11-01), Fitton et al.
patent: 7643596 (2010-01-01), Ruprich et al.
International Preliminary Report on Patentability Chapter I for PCT/EP2006/002341.
“Chip (CDMA)”, Wikipedia, The free Encyclopedia online http://en.wikipedia.org/wiki/OVSF#Orthogonal—variable—spreading—factor).
“CDMA spectral efficiency”, Wikipedia, The free Encyclopedia online http://en.wikipedia.org/wiki/CDMA—spectral—efficiency).

Affiliated with

Also associated with

Rating

Determining a detection signal in a spread spectrum... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Determining a detection signal in a spread spectrum..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining a detection signal in a spread spectrum... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2640357