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:
Feb. 22, 2011
Filed:
Jul. 23, 2007
Goran Djuknic, Tenafly, NJ (US);
Goran Djuknic, Tenafly, NJ (US);
ITT Manufacturing Enterprises, Inc., Wilmington, DE (US);
Abstract
A hybrid spread spectrum system includes a signal combiner for (a) receiving a plurality of spread spectrum encoded data signals and (b) forming a plurality of combined signals. A first set of mixers is included for (a) receiving the plurality of combined signals and at least two carriers, and (b) forming at least a two-carrier, constant envelope signal. A second set of mixers is also included for (a) receiving the at least two-carrier, constant envelope signal and a transmitter hopping signal and (b) forming a hybrid spread spectrum signal. The combined signals include (a) [s(t)−s(t)s(t)s(t)] and (b) [s(t)+s(t)], where s(t) are three separate spread spectrum encoded data signals. The transmitter hopping signal is a sequence of tones having (a) a duration T, where Tis a chip duration, and (b) frequencies ftaken from a set of 2values, where k is a number of bits from a pseudo-random noise (PRN) sequence.