High-data-rate wireless local-area network

Details High-data-rate wireless local-area network High-data-rate wireless local-area network

1994-12-30

1998-09-15

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

H04B 14707

Patent

active

058090606

ABSTRACT:
An apparatus and method for communicating data between at least two data devices, suitable for use as a wireless local-area network, that provides robust data communication via a radio communications channel corrupted by multipath interference, particularly at high data rates. A preferred embodiment of the invention represents data as a sequence of Walsh-function waveforms encoded by pseudo-noise direct-sequence spread-spectrum modulation. Walsh-function-encoding of the data provides a long symbol duration, thereby allowing the spread-spectrum modulation to provide processing gain sufficient to substantially overcome multipath interference, while providing a high data rate. In another preferred embodiment, Walsh-function modulation is supplemented with various forms of phase modulation, such as coherent PSK for bi-orthogonal signalling, and DPSK between orthogonal symbols for noncoherent bi-orthogonal signalling, thereby further increasing data rate without reducing processing gain. In another preferred embodiment, Walsh-function modulation is supplemented with spectral shaping to allow increased bandwidth occupancy, thereby further increasing the processing gain without sacrificing data rate.

REFERENCES:
patent: 4494238 (1985-01-01), Groth, Jr.
patent: 4550414 (1985-10-01), Guinon et al.
patent: 4635221 (1987-01-01), Kerr
patent: 4872182 (1989-10-01), McRae et al.
patent: 5001723 (1991-03-01), Kerr
patent: 5093841 (1992-03-01), Vancraeynest
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5111478 (1992-05-01), McDonald
patent: 5309474 (1994-05-01), Gilhousen et al.
patent: 5414730 (1995-05-01), Landquist et al.
patent: 5511073 (1996-04-01), Padovanni et al.

Affiliated with

Also associated with

Rating

High-data-rate wireless local-area network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High-data-rate wireless local-area network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-data-rate wireless local-area network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-96570