# US 2013/0155941 A1 · Demultiplexing apparatus, multiplexing apparatus, and relay apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155941 A1 - Document ID: US20130155941A1 - Status: Published application - Kind: A1 - Application number: 13/818,578 - Filed: 2011-08-22 - Published: 2013-06-20 - Earliest claimed: 2010-08-25 - Assignees: Mitsubishi Electric Corporation - Inventors: Akinori Fujimura - Web page: https://patentgrep.com/patent/US20130155941A1 ## CPC - H04B 7/15: Active relay systems - H04J 1/05: using digital techniques - H04B 7/155: Ground-based stations (H04B7/204 takes precedence) - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract 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. ## Claims ### Claim at position 1 1-14. (canceled) ### Claim 15 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, and at 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 the frequency conversion and reception low-pass filter unit to any one of the demultiplexed-signal selecting and distributing unit and a frequency converting and reception low-pass filter unit at a preceding stage of the frequency converting and reception low-pass filter unit. ### Claim 16 (depends on 15) The demultiplexing apparatus according to claim 15, wherein the demultiplexed-signal selecting and distributing unit changes a conversion amount of a frequency in the frequency conversion processing and a level of down-sampling in the down-sampling processing based on an arrangement position of the frequency converting and reception low-pass filter unit set as an output destination and a bandwidth of a signal. ### Claim 17 (depends on 15) The demultiplexing apparatus according to claim 15, further comprising a non-reproducing-system switch matrix unit configured to receive, as inputs, signals output from the frequency converting and reception low-pass filter units, select a part or all of the input signals based on a path setting signal generated based on channel information estimated from the input signals, and perform rearrangement of frequency directions of the selected input signals. ### Claim 18 (depends on 15) The demultiplexing apparatus according to claim 15, further comprising: a reproduction and relay signal selector unit configured to select a signal for reproduction and relay from the input signals or the output signals from the frequency converting and reception low-pass filter units; a demodulating and decoding unit configured to perform demodulation and decoding of the signal for reproduction and relay; and a reproducing-system switch matrix unit configured to output the signal after the demodulation and the decoding based on a set path. ### Claim 19 (depends on 15) The demultiplexing apparatus according to claim 15, wherein the frequency converting and reception low-pass filter units are half-band filters. ### Claim 20 (depends on 15) The demultiplexing apparatus according to claim 15, wherein the frequency converting and reception low-pass filter units included in the reception low-pass filter group output the output signals while reducing a sampling rate to a half of a data rate of the input signals through the down-sampling processing. ### Claim 21 (depends on 15) The demultiplexing apparatus according to claim 15, further comprising a reception-channel filter unit configured to subject the signals from the frequency converting and reception low-pass filter units to waveform shaping with a desired frequency characteristic and output the signals. ### Claim 22 A multiplexing apparatus comprising: a transmission low-pass filter group including transmission low-pass filter and frequency converting units configured to apply up-sampling processing and frequency conversion processing to input signals and output the input signals, the transmission low-pass filter and frequency converting units being arranged in a tournament shape, and at least a part of the transmission low-pass filter and frequency converting units inputting, to the transmission low-pass filter and frequency converting units at a next stage, a signal obtained by combining, for each pair of adjacent bands, two output signals and subjecting the output signals to addition processing; an adding unit configured to subject signals output from a pair of the transmission low-pass filter and frequency converting units, bands of which are adjacent to each other, to addition processing; and a multiplexed-signal selecting and distributing unit configured to output, to one or more output destinations designated by a predetermined control signal, signals output from the transmission low-pass filter and frequency converting units. ### Claim 23 (depends on 22) The multiplexing apparatus according to claim 22, wherein the multiplexed-signal selecting and distributing unit changes a level of up-sampling in the up-sampling processing and a conversion amount of a frequency in the frequency conversion processing based on an arrangement position of the transmission low-pass filter and frequency converting unit that outputs an input signal in the tournament configuration of the N-stage and a bandwidth of the signal. ### Claim 24 (depends on 22) The multiplexing apparatus according to claim 22, further comprising a non-reproducing-system switch matrix unit configured to select a part or all of the input signals based on a path setting signal generated based on channel information estimated from the input signals, perform rearrangement of frequency directions of the selected input signals, and output the rearranged input signals to a transmission channel filter unit. ### Claim 25 (depends on 22) The multiplexing apparatus according to claim 22, further comprising: a reproducing-system switch matrix unit configured to output a signal after demodulation and decoding based on a set path; an encoding and modulating unit configured to perform encoding and modulation of the signal output from the reproducing-system switch matrix unit; and a selector unit configured to allocate the encoded and modulated signal to an input stage of the transmission-channel filter unit or an output stage of the adding unit. ### Claim 26 (depends on 22) The multiplexing apparatus according to claim 22, wherein the transmission low-pass filter and frequency converting units are half-band filters. ### Claim 27 (depends on 22) The multiplexing apparatus according to claim 22, wherein the transmission low-pass filter and frequency converting units included in the transmission low-pass filter group output the output signals while interpolating a sampling rate to a double of a data rate of the input signals through the up-sampling processing. ### Claim 28 (depends on 22) The multiplexing apparatus according to claim 22, wherein the transmission-channel filter unit configured to subject the input signals to waveform shaping with a predetermined frequency characteristic and outputs the input signals to the transmission low-pass filter and frequency converting units. ### Claim 29 (depends on 24) A relay apparatus comprising: the multiplexing apparatus according to claim 24; and a demultiplexing apparatus including: 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, and at 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 tow frequency converting and reception low-pass filter units at a next stage; a selector unit configured to switch, based on the control signal, an input source of a signal input to the frequency conversion and reception low-pass filter unit to any one of the demultiplexed-signal selecting and distributing unit and a frequency converting and reception low-pass filter unit at a preceding stage of the frequency converting and reception low-pass filter unit; and a non-reproducing-system switch matrix unit configured to receive, as inputs, signals output from the frequency converting and reception low-pass filter units, select a part or all of the input signals based on a path setting signal generated based on channel information estimated from the input signals, and perform rearrangement of frequency directions of the selected input signals; wherein the filter-bank control units and the non-reproducing-system switch matrix units that are redundant in the demultiplexing apparatus and the multiplexing apparatus are reduced to one filter-bank control unit and one non-reproducing system switch matrix unit. ### Claim 30 (depends on 25) A relay apparatus comprising: the multiplexing apparatus according to claim 25; and a demultiplexing apparatus including: 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, and at 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 tow frequency converting and reception low-pass filter units at a next stage; a selector unit configured to switch, based on the control signal, an input source of a signal input to the frequency conversion and reception low-pass filter unit to any one of the demultiplexed-signal selecting and distributing unit and a frequency converting and reception low-pass filter unit at a preceding stage of the frequency converting and reception low-pass filter unit; and a reproduction and relay signal selector unit configured to select a signal for reproduction and relay from the input signals or the output signals from the frequency converting and reception low-pass filter units; a demodulating and decoding unit configured to perform demodulation and decoding of the signal for reproduction and relay; and a reproducing-system switch matrix unit configured to output the signal after the demodulation and the decoding based on a set path; wherein the filter-bank control units, the non-reproducing-system switch matrix units, the producing-system switch matrices that that are redundant in the demultiplexing apparatus and the multiplexing apparatus are reduced to one filter-bank control unit, one non-reproducing system switch matrix unit, and one reproducing-system switch matrix unit. ### Claim 31 (depends on 29) The relay apparatus according to claim 29, wherein any one of the reception-channel filter units included in the demultiplexing apparatus and the transmission-channel filter unit included in the multiplexing apparatus is deleted. ### Claim 32 (depends on 30) The relay apparatus according to claim 30, wherein any one of the reception-channel filter units included in the demultiplexing apparatus and the transmission-channel filter unit included in the multiplexing apparatus is deleted. ### Claim 33 (depends on 29) The relay apparatus according to claim 29, wherein one or both of the frequency converting and reception low-pass filter units included in the demultiplexing apparatus and the transmission low-pass filter and frequency converting units included in the multiplexing apparatus are half-band filters. ### Claim 34 (depends on 30) The relay apparatus according to claim 30, wherein one or both of the frequency converting and reception low-pass filter units included in the demultiplexing apparatus and the transmission low-pass filter and frequency converting units included in the multiplexing apparatus are half-band filters. ### Claim 35 (depends on 28) A relay apparatus comprising: the multiplexing apparatus according to claim 28; and a demultiplexing apparatus including: 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, and at 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 tow 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 the frequency conversion and reception low-pass filter unit to any one of the demultiplexed-signal selecting and distributing unit and a frequency converting and reception low-pass filter unit at a preceding stage of the frequency converting and reception low-pass filter unit. ### Claim 36 (depends on 22) A relay apparatus comprising: the multiplexing apparatus according to claim 22; and a demultiplexing apparatus including: 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, and at 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 tow frequency converting and reception low-pass filter units at a next stage; a selector unit configured to switch, based on the control signal, an input source of a signal input to the frequency conversion and reception low-pass filter unit to any one of the demultiplexed-signal selecting and distributing unit and a frequency converting and reception low-pass filter unit at a preceding stage of the frequency converting and reception low-pass filter unit; and a reception-channel filter unit configured to subject the signals from the frequency converting and reception low-pass filter units to waveform shaping with a desired frequency characteristic and output the signals.