WIRELESS COMMUNICATION APPARATUS AND TRANSMISSION POWER CONTROL METHOD

摘要

A variable gain amplifier amplifies a baseband signal. A quadrature modulator quadrature-modulates the amplified baseband signal to generate a high-frequency signal. A power amplifier amplifies the generated high-frequency signal. An antenna transmits the amplified high-frequency signal. A detector detects the amplified high-frequency signal. A first nonvolatile memory stores the desired transmission power of the high-frequency signal to be transmitted from the antenna. A controller adjusts the gain of the variable gain amplifier depending on the output of the detector and the transmission power stored in the first nonvolatile memory.

主权项

1. A wireless communication apparatus comprising:
a variable gain amplifier that amplifies a baseband signal; a quadrature modulator that quadrature-modulates the amplified baseband signal to generate a high-frequency signal; a power amplifier that amplifies the generated high-frequency signal; an antenna that transmits the amplified high-frequency signal; a detector that generates a detection signal obtained by detecting the amplified high-frequency signal; a first nonvolatile memory that stores a value of a desired transmission power of the high-frequency signal to be transmitted from the antenna, the value being a preliminarily measured value; and a second nonvolatile memory that stores a gain adjustment value for adjusting a gain of the variable gain amplifier in the case that the detection signal is equal to or greater than the value of the desired transmission power; and a controller that increases the gain of the variable gain amplifier in the case that the detection signal is smaller than the value of the desired transmission power, and subtracts the gain adjustment value from the gain of the variable gain amplifier in the case that the detection signal is equal to or greater than the value of the desired transmission power.