ADSL modem apparatus and communication method for the ADSL modem apparatus
AssigneePanosonic Communications Co., Ltd.
InventorsNobuhiko Noma, Tatsuo Imai, Keiichi Tomita
Life of this patent
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Abstract
An ADSL modem apparatus that serves as an ATU-R receives a signal in the hyperframe format having FEXT and NEXT parts, when an initialization sequence is started, the signal configured with a known number of symbols. The received signal is sampled by an AFE and stored in a buffer memory of an FFT unit. A processor establishes a symbol synchronization and a hyperframe synchronization, upon receiving an original signal, based on sample data of the original signal, the original signal having REVERB signals during a FEXT period and non-REVERB signals (distinguishable from REVERB signals) during a NEXT period.
Claims14
An ADSL modem apparatus comprising:
- a receiver that receives a signal, when an initialization sequence is started, in a hyperframe format having FEXT and NEXT parts, the signal configured with a known number of symbols;
- a sampling unit that samples the signal received by said receiver and outputs sample data;
- and
- a controller that establishes a symbol synchronization and a hyperframe synchronization, upon receiving an original signal, based on sample data of the original signal, the original signal having a REVERB signal inserted in the FEXT part and a non-REVERB signal inserted in the NEXT part, the non-REVERB signal being distinguishable from the REVERB signal.
An ADSL modem apparatus comprising:
- a transmitter that transmits a signal, when an initialization sequence is started, in a hyperframe format having FEXT and NEXT parts, the signal configured with a known number of symbols;
- and
- a controller that enables said transmitter to transmit an original signal during a transmission period of one of C-REVERB1, C-REVERB2, and C-REVERB3, the original signal having a REVERB signal inserted in the FEXT part and a non-REVERB signal inserted in the NEXT part, the non-REVERB signal being distinguishable from the REVERB signal.
An ADSL modem apparatus comprising:
- a transmitter that transmits a signal, when an initialization sequence is started, in a hyperframe format having FEXT and NEXT parts, the signal configured with a known number of symbols;
- and
- a controller that enables said transmitter to transmit an original signal only for several sub-frames from the beginning of the hyperframe during a transmission period of one of C-PILOT1 and C-PILOT1A, the original signal having a REVERB signal inserted in the FEXT part and a non-REVERB signal inserted in the NEXT part, the non-REVERB signal being distinguishable from the REVERB signal.
A communication method comprising:
- receiving a signal, when an initialization sequence is started, in a hyperframe format having FEXT and NEXT parts, the signal configured with a known number of symbols;
- sampling the received signal and outputs sample data;
- and
- establishing a symbol synchronization and a hyperframe synchronization, upon receiving an original signal, based on sample data of the original signal, the original signal having a REVERB signal inserted in the FEXT part and a non-REVERB signal inserted in the NEXT part, the non-REVERB signal being distinguishable from the REVERB signal.
A communication method comprising:
- transmitting a signal, when an initialization sequence is started, in a hyperframe format having FEXT and NEXT parts, the signal configured with a known number of symbols;
- and
- transmitting an original signal during a transmission period of one of CREVERB1, C-REVERB2, and C-REVERB3, the original signal having a REVERB signal inserted in the FEXT part and a non-REVERB signal inserted in the NEXT part, the non-REVERB signal being distinguishable from the REVERB signal.
A communication method comprising:
- transmitting a signal, when an initialization sequence is started, in a hyperframe format having FEXT and NEXT parts, the signal configured with a known number of symbols;
- and
- transmitting an original signal only for several sub-frames from the beginning of the hyperframe during a transmission period of one of C-PILOT1 and C-PILOT1A, the original signal having a REVERB signal inserted in the FEXT part and a non-REVERB signal inserted in the NEXT part, the non-REVERB signal being distinguishable from the REVERB signal.
Dependencies are inferred from the claim text.