The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 1988
Filed:
Jan. 17, 1986
Applicant:
Inventors:
Fred M Longstaff, Islington, CA;
Gordon R Lang, Bolton, CA;
Assignee:
Motorola Canada Limited, N. York, CA;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
375 39 ; 371 37 ; 370 21 ;
Abstract
Numeric signals appearing on a communication channel are converted in blocks of b signals to a number N. The number N is converted to coordinates in K dimensional space where 40.gtoreq.K<4. The coordinates are selected to provide suitable packing in the dimensional space represented by K. The values of coordinates selected are modulated on a carrier and transmitted. Apparatus is provided which carries out the above steps. Where K=24 the coordinates are selected to be expressible in integral form and in integral form are selected so that they have all even values with a sum of 0 modulo 8 or all odd values with a sum of 4 modulo 8.