Demultiplexing apparatus, multiplexing apparatus, and relay apparatus

摘要

A demultiplexing apparatus includes: a demultiplexed-signal selecting and distributing unit configured to apply frequency conversion processing and down-sampling processing to one or more reception signals and output reception signals to a designated output destination; frequency converting and reception low-pass filter units configured to apply frequency conversion processing and low-pass filter processing to reception signals and output reception signals while down-sampling reception signals; selector units configured to switch an input source of a signal output to the frequency converting and reception low-pass filter unit at a next stage; reception-channel filter units configured to subject signals from the frequency converting and reception low-pass filter units to waveform shaping with a desired frequency characteristic and output the signals; and a filter-bank control unit configured to generate, based on channel information estimated from one or more reception signals, a control signal controlling the demultiplexed-signal selecting and distributing unit and the selector units.

主权项

1. A demultiplexing apparatus comprising:
a demultiplexed-signal selecting and distributing unit configured to output one or more input signals to one or more output destinations designated by a predetermined control signal; a reception low-pass filter group including,
frequency converting and reception low-pass filter units configured to apply frequency conversion processing and down-sampling processing to an output signal of the demultiplexed-signal selecting and distributing unit,the frequency converting and reception low-pass filter units being arranged in a tree shape, andat least a part of the frequency converting and reception low-pass filter units dividing the output signal into two and inputting the divided output signals to two frequency converting and reception low-pass filter units at a next stage; and a selector unit configured to switch, based on the control signal, an input source of a signal input to one of the frequency conversion and reception low-pass filter units between 1) the demultiplexed-signal selecting and distributing unit and 2) a preceding frequency converting and reception low-pass filter unit at a preceding stage of the frequency converting and reception low-pass filter units.