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:
Apr. 11, 2000
Filed:
Oct. 20, 1997
Hitoshi Matsui, Tokyo, JP;
NEC Corporation, , JP;
Abstract
Multiplexing of signals with an application of a spread spectrum signal multiplexing system employing chirp signals is disclosed. A plurality of transmission signals are respectively time-shifted and synthesized. Then the synthesized signal is convoluted by a chirp signal from a chirp filter so as to generate a transmission signal. At a demodulation section, the multiplexed signal is time-divided due to being passed through an inverse-chirp filter. Then multipath distortion at a transmission channel is eliminated by a decision feed-back equalizer. From multiplexed signal from which the distortion is to be removed each of the signals is extracted respectively different timing data for each signal so as to output the signals as received data.