| 摘要 |
PROBLEM TO BE SOLVED: To achieve a channelizer for a frequency division multiplex signal that respectively adjusts signal levels of all receiving channels and sufficiently secures a dynamic range of each channel.SOLUTION: A sampling rate of the frequency division multiplex signal via an A/D converter 11 and an orthogonal detector 12 is reduced by a decimation filter 13 to be converted into a baseband signal, a demultiplexer 14 demultiplexes a plurality of channel signals included in the baseband signal, and a switch 15 arranges the demultiplexed channel signals in arbitrary order and outputs the channel signals as time division multiplex signals. A channel gain adjuster 16 that determines magnitude of the signal level of each channel of the time division multiplex signal and increases/decreases the signal level of each channel according to a determination result is included. The time division multiplex signal obtained by adjusting the signal level of each channel is converted into the frequency division multiplex signal by a multiplexer 17 and outputted via an interpolation filter 18, an orthogonal modulation 19, and a D/A converter 20. |
