RADIO COMMUNICATION SYSTEM

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 mult...

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Bibliographic Details
Main Author AONO MASAHIRO
Format Patent
LanguageEnglish
Japanese
Published 10.08.2017
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary: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 【課題】 本発明の目的は、ダイレクトコンバージョン方式の無線機において搬送波の周波数を下げることなく動作周波数を下げ、消費電力を低減することにある。【解決手段】本発明は、方形波信号を生成する位相同期回路と、前記方形波信号と送信データを乗算する乗算器と、前記乗算された信号を送信波として出力する送信アンテナと、前記方形波の高周波成分を前記送信波とするように、前記位相同期回路の動作周波数を設定するＰＬＬ周波数設定部を備えることを特徴とする。【効果】本発明を用いることにより、ダイレクトコンバージョン方式の無線機において搬送波の周波数を下げることなく動作周波数を下げ、消費電力を低減できる。【選択図】 図1
Bibliography:Application Number: JP20160017608