Title:
RADIO COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP2017139536
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To decrease an operating frequency without decreasing a carrier wave frequency in radio equipment of a direct conversion method, to reduce power consumption.SOLUTION: A radio communication system includes: a phase-locked loop circuit which generates a square wave signal; a multiplier which multiplies the square wave signal by transmission data; a transmission antenna which outputs the multiplied signal as a transmission wave; and a PLL frequency set unit which sets the operating frequency of the phase-locked loop circuit in a manner to determine the high frequency component of the square wave to be the transmission wave.EFFECT: The use of the present invention enables the decrease of an operating frequency without decreasing a carrier wave frequency in radio equipment of a direct conversion method, with the reduction of power consumption.SELECTED DRAWING: Figure 1
Inventors:
AONO MASAHIRO
Application Number:
JP2016017608A
Publication Date:
August 10, 2017
Filing Date:
February 02, 2016
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04B1/30; H04B1/04; H04B1/403
Attorney, Agent or Firm:
Yuji Toda
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