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:
Sep. 25, 2001
Filed:
Nov. 14, 1996
Yasuhiko Wakabayashi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In the phase modulation multiplexing transmission unit of FIG. 2, a digital input signal is divided by a signal division unit,, each of the resultant division signals is output to multiplication units,and,, respectively. The multiplication units,and,multiply the division signals by spread code signals output from spread code generators,and,, respectively. A multiplication signal Sb output from the multiplication unit,is shifted by &pgr;/2 radian through a phase shifter,, which is added to a multiplication signal Sa output from the multiplication unit,through an adder,. A synthetic signal Se(n) output from the adder,is BPSK modulated through a modulator,, which is transmitted through a transmission amplifier,and an antenna
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