Method and apparatus using simple codes for the wireless transmission of non ...

United States Patent m

Halpern

[54] METHOD AND APPARATUS USING SIMPLE CODES FOR THE WIRELESS TRANSMISSION OF NON-DATA SYMBOLS

[75] Inventor: Peter H. Halpern, Longwood, Fla.

[73] Assignee: Digital Ocean, Inc., Lenexa, Kans.

[21] Appl. No.: 312,840
[22] Filed: Sep. 27,1994

[51] Int. CI.6 H04K 1/00

[52] U.S. CI 345/200; 345/242; 345/281

[58] Field of Search 375/200, 206,

375/281, 242, 207; 370/99, 111; 360/40;

341/52, 55

[56] References Cited

U.S. PATENT DOCUMENTS

3,921,210 11/1975 Halpern 360/40

4,312,070 1/1982 Coombes et al 371/40

4,383,322 5/1983 Halpern et al 375/200

4,403,331 9/1983 Halpern et al 375/259

4,601,046 7/1986 Halpern et al 375/260

4,649,549 3/1987 Halpern et al 380/32

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US005570388A [li] Patent Number: 5,570,388 [45] Date of Patent: Oct. 29, 1996

4,924,463 5/1990 Thomas et al 370/105.4

OTHER PUBLICATIONS

Bruce Tuch, Development of WaveLAN an ISM Band Wireless LAN, AT&T Technology Journal, Jul./Aug. 1993, vol. 72, No. 4, pp. 27-37.

Peter H. Halpern, The Use of Matched Filters for Synchronization.

Accredited Standards Committee, FDDI Physical Layer Protocol, Aug. 6, 1992.

Primary Examiner—Stephen Chin

Assistant Examiner—T. Ghebretinsae

Attorney, Agent, or Firm—Laubscher & Laubscher

[57] ABSTRACT

A wireless data communication system includes a code encoder for transforming pulse code modulated data into a simple code having an alphabet with at least one spare symbol into which a delimiter symbol is introduced, which code is transmitted to a receiver including a matched filter arrangement and a code maximum decision arrangement for decoding the transmitted code signal and for detecting the delimiter symbol.

5 Claims, 3 Drawing Sheets