Method and device for the echo compensation of a reception signal
View Patent ↗A method and a device are provided for the echo compensation of a reception signal, a transmission signal being composed of a plurality of transmission subsignals which are generated in a corresponding plurality of signal paths, and a transmission combination signal, which corresponds to a combination of the plurality of transmission subsignals, being delivered to an echo compensation filter in order to generate the echo compensation signal from it. The distribution of the transmission signal may be carried out by distributing of a frequency bandwidth of the transmission signal between a plurality of frequency bands. The method and the device are designed inter alia for the processing of xDSL signals, in particular VDSL2 signals.
1. A method for the echo compensation of a reception signal, comprising:
generating an echo compensation signal which replicates an echo component caused by a transmission signal in the reception signal, the transmission signal composed of a plurality of transmission subsignals generated in a corresponding plurality of signal paths, the echo compensation signal being generated from a first signal using an echo compensation signal, the first signal corresponding to a combination of the plurality of transmission subsignals, and
obtaining an echo-compensated reception signal with a reduced echo component by combining the echo compensation signal with the reception signal, wherein a frequency bandwidth of the transmission signal is distributed into a plurality of frequency bands, each frequency band assigned to a corresponding one of the plurality of signal paths.
2. The method according to claim 1 , further comprising signal conditioning the transmission subsignals in each of the plurality of signal paths using line drivers.
3. The method according to claim 1 , wherein the frequency bandwidth of the transmission signal is composed of individual frequency bands of the transmission subsignals.
4. The method according to claim 1 , wherein obtaining the echo-compensated reception signal further comprises forming a reception combination signal from a plurality of reception subsignals and combining the reception combination signal with the echo compensation signal.
5. The method according to claim 1 , wherein the first signal constitutes the transmission signal before distribution of the transmission signal into the transmission subsignals.
6. The method according to claim 1 , wherein the first signal constitutes the transmission signal converted to an analog signal prior to being provided to an echo compensation filter.
7. The method according to claim 1 , wherein the echo compensation signal is digitally generated and subsequently converted into an analog echo compensation signal, before the analog echo compensation signal is combined with the reception signal.
8. The method according to claim 1 , wherein the transmission subsignals are combined by addition to form the first signal.
9. The method according to claim 1 , wherein obtaining an echo-compensated reception signal further comprises obtaining a difference between the reception signal and the echo compensation signal.
10. The method according to claim 1 , wherein the reception signal comprises an xDSL signal.
11. The method according to claim 10 , wherein the reception signal comprises a VDSL 2 signal.
12. An arrangement configured to provide echo compensation of a reception signal, comprising:
an echo compensation filter which generates, from a first signal, an echo compensation signal which replicates an echo component caused by a transmission signal in the reception signal, the transmission signal composed of a plurality of transmission subsignals, which are generated in a corresponding plurality of signal paths, the first signal corresponding to a combination of the plurality of transmission subsignals;
a combination device configured to combine the echo compensation signal with the reception signal in order to form an echo-compensated reception signal with a reduced echo component; and
a distribution unit configured to distribute a frequency bandwidth of the transmission signal between a plurality of frequency bands assigned to the individual signal paths.
13. The arrangement according to claim 12 , further comprising line drivers configured to provide signal conditioning of individual transmission subsignals in each of the plurality of signal paths.
14. The arrangement according to claim 12 , wherein the combination device is configured to form the reception subsignals with a reduced echo component from the echo compensation signal and a reception combination signal, the reception combination signal formed from reception subsignals tapped from individual signal paths.
15. The arrangement according to claim 12 , further comprising a D/A converter operably coupled to convert a digital echo compensation signal generated by the echo compensation filter to an analog echo compensation signal, and to provide the analog echo compensation signal to the combination device.
16. The arrangement according to claim 12 , further comprising a distribution unit configured to distribute the transmission signal among the plurality of signal paths corresponding to the individual transmission subsignals.
17. The arrangement according to claim 12 , further comprising an adder device configured to generate the first signal from the transmission subsignals.
18. The arrangement according to claim 12 , wherein the combination device is configured to generate the echo-compensated reception signal based on a difference between the reception signal and the echo compensation signal.
19. The arrangement according to claim 12 , wherein the reception signal comprises an xDSL signal.
20. The arrangement according to claim 19 , wherein the reception signal comprises a VDSL2 signal.