Method and apparatus for generating a large number of codes...

Details Method and apparatus for generating a large number of codes... Method and apparatus for generating a large number of codes...

2005-06-28

2005-06-28

Tran, Khai (Department: 2637)

Pulse or digital communications

Spread spectrum

C375S150000

Reexamination Certificate

active

06912240

ABSTRACT:
The present invention relates to a method for generating and apparatus for employing code families having desirable correlation properties. Regardless of code length, maximum autocorrelation of the codes is 4 for any nonzero offset and maximum cross-correlation of any two codes from a code family is 4 for any offset. The codes can be used in impulse radio systems and non-impulse radio systems including CDMA, TDMA, FDMA, OFDM and various other frequency hopping and direct sequence systems. The codes can be used to specify various impulse radio and non-impulse radio signal characteristics including pulse position in time, amplitude, width, type, phase, phase difference, frequency, spreading code, etc. The codes have the unique property that they can specify as many as two components in which a signal is not present. A method of code compression is provided.

REFERENCES:
patent: 5353352 (1994-10-01), Dent et al.
patent: 6005894 (1999-12-01), Kumar
patent: 6320897 (2001-11-01), Fattouche et al.
“The Theory of Error-Correcting Codes” MacWilliams et al., North-Halland Mathematical Library, vol. 16, Bell Laboratories.
“New Constructions of Optimal Cyclically Permutable Constant Weight Codes” Moreno et al., IEEE Transactions of Information Theory, vol. 41, No. 2, Mar. 1995.

Affiliated with

Also associated with

Rating

Method and apparatus for generating a large number of codes... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for generating a large number of codes..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for generating a large number of codes... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3486302