Reducing the effect of noise in a multi-channel telecommunication receiver
View Patent ↗A telecommunication receiver provided according to the present invention is implemented to receive a first signal containing information and noise on a first set of sensors and a second signal containing only noise on a second set of sensors. Receiver then decodes the information using first signal and second signal. In one embodiment, a bonded DSL receiver with k signals sensors is implemented with additional s number of noise only sensors to receive only noise. Accordingly, joint demodulation is performed using signals received on k signals sensors and s noise only sensors. The noise sensor is implemented in common mode.
1. A method comprising:
receiving, at a receiver, a first signal containing information and noise on a communication channel;
receiving, at said receiver, a second signal containing only noise on a dummy channel; and
extracting said information by jointly demodulating said first signal and said second signal, thereby reducing effect of noise while extracting said information in the receiver.
2. The method of claim 1 , wherein the first signal is received by a signal sensor and the second signal is received by a noise sensor.
3. The method of claim 2 , wherein
said first signal represents a xDSL signal on a pair of conducting wires implementing said communication channel;
said signal sensor represents a first pair of conducting pads implemented to receive said xDSL signal; and
said noise sensor represents a second pair of conducting pads connected to a dummy conducting wire implementing said dummy channel.
4. The method of claim 2 , wherein
said first signal comprises a plurality of first sub-signals;
said second signal comprises a plurality of second sub-signals;
said signal sensor comprises a plurality of sub-signal sensors wherein each of said plurality of sub-signal sensor receives one of said plurality of first sub-signals; and
said noise sensor comprises a plurality of sub-noise sensors, wherein each said sub-noise sensors receives one of said plurality of second sub-signals.
5. The method of claim 4 , wherein
said plurality of first sub-signals represents a plurality of xDSL signals, each xDSL signal corresponds to a first pair of conducting wires; and
said plurality of sub-signal sensors represents a plurality of pairs of conducting pads, each pair of conducting pads corresponds to the first pair of conducting wires.
6. The method of claim 4 , wherein said plurality of sub-noise sensors operates in pairs wherein each said second sub-signal represents a common signal received on each said pair.
7. The method of claim 4 , wherein the extracting comprises using a matrix G[q,t],
wherein
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such that
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is minimized,
wherein t represents a time instant and q represents a frequency of a sub-signal;
wherein y k represents said first signal comprising k first sub-signals received on k pairs of said conducting wires connected to k pairs of said sub-signals sensors;
wherein y s represents said second signal comprising s second sub-signals received on s pairs of conducting wires connected to s pair of said sub-noise sensors, and
x k represents said information component in said first signal.
8. The method of claim 7 , wherein said k pairs represent the k channels of a bonded xDSL system and s pairs represent the unused channels in said bonded xDSL system.
9. A telecommunications receiver comprising;
a signal sensor receiving a first signal having an information component and a noise component on a communication channel;
a noise sensor receiving a second signal having only the noise component on a dummy channel; and
a decoder extracting said information component from said first signal by jointly demodulating said first signal and said second signal.
10. The telecommunications receiver of claim 9 , wherein
the signal sensor comprises a signal sensing means for receiving the first signal;
the noise sensor comprises a noise sensing means for receiving the second signal; and
the decoder comprises a decoding means for extracting the information component.
11. The telecommunications receiver of claim 9 , wherein
said first signal represents a xDSL signal on a pair of conducting wires implementing said communication channel;
said signal sensor represents the first pair of conducting pads implemented to receive said xDSL signal; and
said noise sensor represents a second pair of conducting pads connected to a dummy conducting wire implementing said dummy channel.
12. The telecommunications receiver of claim 9 , wherein
said first signal comprises plurality of first sub-signals;
said second signal comprises plurality of second sub-signals;
said signal sensor comprises plurality of sub-signal sensors wherein each of said plurality of sub-signal sensor receives one of plurality of said first sub-signals; and
said noise sensor comprises plurality of sub-noise sensors, wherein each said sub-noise sensors receives one of said plurality of second sub-signals.
13. The telecommunications receiver of claim 12 , wherein
said plurality of first sub-signals represents a plurality of xDSL signals, each xDSL signal corresponds to a first pair of conducting wires; and
said plurality of sub-signal sensors represents a plurality of pairs of conducting pads, each pair of conducting pads corresponds to the first pair of conducting wires.
14. The telecommunications receiver of claim 13 wherein said plurality of sub-noise sensors operates in pairs wherein each said second sub-signal represents a common signal received on each said pair.
15. The telecommunications receiver of claim 14 , wherein said decoder extracts the information using a matrix G[q,t],
wherein
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such that
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is minimized,
wherein t represents a time instant and q represents a frequency of a sub-signal;
wherein y k represents said first signal comprising k first sub-signals received on k pairs of said conducting wires connected to k pairs of said sub-signals sensors;
wherein y s represents said second signal comprising s second sub-signals received on s pairs of conducting wires connected to s pair of said sub-noise sensors, and
x k represents said information component in said first signal.
16. The telecommunications receiver of claim 15 , wherein said k pairs represent the k channels of a bonded xDSL system and s pairs represent the unused channels in said bonded xDSL system.
17. A system for receiving a bonded DSL signal:
a first plurality of pairs of sensors connected to a first plurality of said differential DSL channels each carrying a bonded DSL signal, wherein each bonded DSL signal comprises an information component and a noise component;
a second plurality of pairs of sensors connected to second plurality of dummy differential channels each carrying only noise; and
a decoder extracting said information component from said bonded DSL signal by jointly decoding and demodulating the signals received on said first plurality of pairs of sensors and said second plurality of pairs of sensors.
18. The system of claim 17 , wherein the decoder comprises a decoding means for extracting the information component.
19. The system of claim 17 , wherein said decoder extracts the information using a matrix G[q,t],
wherein
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q
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=
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+
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[
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such that
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[
q
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2
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is minimized,
wherein t represents a time instant and q represents a frequency of the bonded DSL signal;
wherein y k represents said first signal comprising k first sub-signals received on k pairs of said conducting wires connected to k pairs of said sub-signals sensors;
wherein y s represents said second signal comprising s second sub-signals received on s pairs of conducting wires connected to s pair of said sub-noise sensors, and
x k represents said information component in said first signal.
20. The system of claim 19 , wherein said k pairs represent the k channels of a bonded xDSL system and s pairs represent the unused channels in said bonded xDSL system.