Apparatus for mobile communication system which performs signal transmission by amplitude modulation and phase modulation
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United States of America Patent
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Sep 19, 2006
Grant Date -
Oct 7, 2004
app pub date -
Feb 26, 2003
filing date -
May 31, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mobile communication system has a mobile phone in which a voltage is set corresponding to the characteristic variation of a PA even when a PA having characteristic variation is used. The mobile phone employs a polar loop method, which comprises an antenna (1) for transmission and reception of signal waves; an antenna switch (2) for switching the transmission mode and the reception mode; a BBLSI (3) having a function to control the transmission and reception; an RFIC (4) having a function for modulating and demodulating the transmitted and received signals; and a PA (5) for amplifying up to the target output power by means of the amplitude modulation at the time of the transmission.
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