Spread spectrum communication device and communication system

Details Spread spectrum communication device and communication system Spread spectrum communication device and communication system

2007-09-25

2007-09-25

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S150000, C375S151000, C375S153000, C375S143000, C310S31300R, C310S359000, C333S150000, C342S195000, C370S342000

Reexamination Certificate

active

10730003

ABSTRACT:
A structure of a spectrum spreading communication device which solves the problem with the conventional spectrum spreading communication using Barker codes, etc., and limits the rise of the side-lobe of a correctional signal independently of the order of information codes by use of a code sequence having a code length of at least 14. The spectrum spreading communication device uses a pseudo-noise code having code length of at least 14 and a self-correlation side-lobe of not greater than 3 as a pseudo-noise code of a direct spreading communication device which uses the pseudo-noise codes whose polarities are inverted so as to deal with also digital information. Thus, even when the pseudo-noise code length is 14 or more, the side-lobe of the correction coefficient can be restricted. Accordingly, the error rate of the spectrum spreading communication device is reduced and the processing gain is improved.

REFERENCES:
patent: 4095225 (1978-06-01), Erikmats
patent: 5073898 (1991-12-01), Endo et al.
patent: 5144639 (1992-09-01), Uchida et al.
patent: 5179574 (1993-01-01), Watanabe et al.
patent: 5218620 (1993-06-01), Mori et al.
patent: 5294858 (1994-03-01), Nakahata et al.
patent: 5353304 (1994-10-01), Mochizuki
patent: 5375141 (1994-12-01), Takahashi
patent: 5381444 (1995-01-01), Tajima
patent: 5488629 (1996-01-01), Takahashi et al.
patent: 5499265 (1996-03-01), Dixon et al.
patent: 5530697 (1996-06-01), Watanabe
patent: 5576590 (1996-11-01), Ohnishi et al.
patent: 5646964 (1997-07-01), Ushirokawa et al.
patent: 6134264 (2000-10-01), Shiba et al.
patent: 6697418 (2004-02-01), Shiba et al.
patent: 57199355 (1982-12-01), None
patent: 59104841 (1984-06-01), None
patent: 3174835 (1991-07-01), None
patent: 05145520 (1993-06-01), None
patent: 05252141 (1993-09-01), None
S. Minagawa, et al, “Sezawa Wave Correlator Using Monolithic ZnO/SiO2/Si Structure” Proceedings of IEEE 1984 Ultrasonics Symposium, pp. 298-302, Dallas, TX.
Niitsuma, et al, “Development of Zero-Bias and Surface Mounting ZnO/Si/ SAW Convolvers” Technical Report of IEICE, SST93-44.
J. Gau, et al, SAW Barker Code Correlator with Improved Sidelobes, IEEE 1985 Ultrasonics Symposium, pp. 145-145.
T. Shiba, “Low Insertion Loss Surface Acoustic Wave Matched Filter with Low Sidelobe Sequence and its Application for Spread Spectrum Communication” JPN, J. Appl. Phys. vol. 35, Part 1, No. 5B, (May 1996), pp. 3024-3027.
T. Shiba, “Low Loss Saw Matched Filters with Low Sidelobe Sequences and Spread Spectrum Application”, Multimedia Systems R&D Division, Research Institute of Electrical Communication, ISSSTA, 1996.

Affiliated with

Also associated with

Rating

Spread spectrum communication device and communication 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 Spread spectrum communication device and communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread spectrum communication device and communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3725879