METHOD AND APPARATUS FOR ELIMINATING INTERFERENCE AMONG TRANSMISSION CHANNELS OF TRANSMITTER

• US 20150270857A1
• Filed: 06/09/2015
• Published: 09/24/2015
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Li, Xingwen, Ye, Siqing, Wang, Yongsheng, Chang, Yan
• Granted Patent: US 9,548,771 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04L 25/08 Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
• CPC Class Codes: H04L 27/366 Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator

Abstract

Embodiments of the present invention provide a method and an apparatus for eliminating interference among transmission channels of a transmitter. The method includes: generating a compensation parameter according to an output signal of an analog module on a transmission channel to be processed by the transmitter and an input signal of a digital module on each transmission channel among all transmission channels of the transmitter; generating a cancellation signal according to the compensation parameter and an input or output signal of a digital module on another transmission channel except for the transmission channel to be processed; and performing, according to the cancellation signal, interference elimination processing on the transmission channel to be processed. The method and apparatus according to the embodiments of the present invention avoid an increase of a transmitter product size, and improve an effect of eliminating interference among transmission channels.

Claims

1. A method for eliminating interference among transmission channels of a transmitter, the method comprising:

generating a compensation parameter according to an output signal of an analog module on a transmission channel to be processed by the transmitter and an input signal of a digital module on each transmission channel among all transmission channels of the transmitter;

generating a cancellation signal according to the compensation parameter and an input or output signal of a digital module on another transmission channel except for the transmission channel to be processed; and

performing, according to the cancellation signal, interference elimination processing on the transmission channel to be processed.

2. The method according to claim 1, wherein:

generating a compensation parameter according to an output signal of an analog module on a transmission channel to be processed by the transmitter and an input signal of a digital module on each transmission channel among all transmission channels of the transmitter comprises;

performing analog-to-digital conversion on the output signal of the analog module on the transmission channel to be processed,

generating an injected signal according to the analog-to-digital converted signal and input signals of digital modules on the all transmission channels, and

generating the compensation parameter according to the input signal of the digital module on each transmission channel among the all transmission channels and the injected signal; and

after generating the injected signal according to the analog-to-digital converted signal and input signals of digital modules on the all transmission channels, the method further comprises;

inputting the injected signal to a training sequence pre-constructing submodule of a digital module on the transmission channel to be processed.

3. The method according to claim 1, wherein performing, according to the cancellation signal, interference elimination processing on the transmission channel to be processed comprises:

combining an output signal of a digital module on the transmission channel to be processed and the cancellation signal, and sending the combined signal to a digital-to-analog converter on the transmission channel to be processed.

4. The method according to claim 1, wherein performing, according to the cancellation signal, interference elimination processing on the transmission channel to be processed comprises:

combining an input signal of a digital module on the transmission channel to be processed and the cancellation signal, and sending the combined signal to the digital module on the transmission channel to be processed.

5. An apparatus for eliminating interference among transmission channels of a transmitter, the apparatus comprising:

a parameter generating unit, configured to generate a compensation parameter according to an output signal of an analog module on a transmission channel to be processed by the transmitter and an input signal of a digital module on each transmission channel among all transmission channels of the transmitter;

a cancellation signal generating unit, connected to the parameter generating unit, and configured to generate a cancellation signal according to the compensation parameter and an input or output signal of a digital module on another transmission channel except for the transmission channel to be processed; and

a cancellation processing unit, connected to the cancellation signal generating unit, and configured to perform, according to the cancellation signal, interference elimination processing on the transmission channel to be processed.

6. The apparatus according to claim 5, wherein the parameter generating unit is configured to:

perform analog-to-digital conversion on the output signal of the analog module on the transmission channel to be processed;

generate an injected signal according to the analog-to-digital converted signal and input signals of digital modules on the all transmission channels;

generate the compensation parameter according to the input signal of the digital module on each transmission channel among the all transmission channels and the injected signal; and

input the injected signal to a training sequence pre-constructing submodule of a digital module on the transmission channel to be processed.

7. The apparatus according to claim 5, wherein the cancellation processing unit is configured to combine an output signal of a digital module on the transmission channel to be processed and the cancellation signal, and send the combined signal to a digital-to-analog converter on the transmission channel to be processed.

8. The apparatus according to claim 5, wherein the cancellation processing unit is configured to combine an input signal of a digital module on the transmission channel to be processed and the cancellation signal, and send the combined signal to the digital module on the transmission channel to be processed.

9. The apparatus according to claim 5, wherein:

the parameter generating unit comprises a parameter generating subunit and a feedback signal collecting subunit;

the feedback signal collecting subunit comprises a coupled circuit and an analog-to-digital converter, and an output end of the analog module on the transmission channel to be processed is connected to the parameter generating subunit through the coupled circuit and the analog-to-digital converter; and

the parameter generating subunit is configured to generate an injected signal according to the analog-to-digital converted signal that is output by the analog-to-digital converter and input signals of digital modules on the all transmission channels, generate the compensation parameter according to the input signal of the digital module on each transmission channel among the all transmission channels and the injected signal, and input the injected signal to the training sequence pre-constructing submodule of the digital module on the transmission channel to be processed.

10. The apparatus according to claim 7, wherein the cancellation processing unit comprises an adder, and the adder respectively connects to an output end of the digital module on the transmission channel to be processed, an output end of the cancellation signal generating unit, and an input end of the digital-to-analog converter on the transmission channel to be processed.

11. The apparatus according to claim 8, wherein the cancellation processing unit is an adder, and the adder connects to an input end of the digital module on the transmission channel to be processed.

12. A transmitter, comprising:

transmission channels; and

an apparatus for eliminating interference among the transmission channels of the transmitter according to claim 5.