Method and apparatus for domain transformation multiple signal processing
View Patent ↗A method and apparatus of joint processing a plurality of digital signal streams is disclosed. The method includes transforming a plurality of the digital signal streams from an original domain to a lower complexity processing domain. The transformed plurality of digital signal streams are joint processed, wherein the joint processing includes multiplying samples of the plurality of transformed digital signal streams by a processing matrix. The joint processed signal streams are inverse transformed back to the original domain. Diagonal elements of the processing matrix are adaptively selected to cancel transmission echo signals of the plurality digital signal streams introduced during transmission of the plurality digital signal streams depending upon signal coupling of the plurality of digital signal streams.
1. A method of joint processing a plurality of digital signal streams, comprising:
transforming a plurality of the digital signal streams from an original domain into a lower complexity processing domain;
joint processing of the transformed plurality of digital signal streams, each of the joint processed digital signal streams being influenced by characteristics of other of the joint processed digital signal streams, wherein the joint processing includes multiplying samples of the plurality of transformed digital signal streams by a processing matrix;
inverse transforming the joint processed signal streams back to the original domain; and
adaptively selecting diagonal elements of the processing matrix to cancel transmission echo signals of the plurality digital signal streams introduced during transmission of the plurality digital signal streams depending upon signal coupling of the plurality of digital signal streams.
2. The method of claim 1 , wherein the joint processing of the transformed plurality of signal streams is performed on signal streams to be transmitted.
3. The method of claim 1 , wherein the joint processing of the transformed plurality signal streams is performed on received signal streams.
4. The method of claim 1 , wherein off-diagonal elements of the processing matrix are selected to reduce cross-talk between the plurality of digital signal streams.
5. The method of claim 1 , wherein off-diagonal elements of the processing matrix are selected to cancel transmission cross-talk of the plurality of digital signal streams introduced during transmission of the plurality of digital signal streams.
6. The transceiver of claim 1 , wherein the diagonal elements of the processing matrix are additionally selected to cancel transmission cross-talk of the plurality digital signal streams introduced during reception of the plurality digital signal streams.
7. The method of claim 1 , wherein at least one digital signal stream includes time domain processing.
8. The method of claim 1 , wherein the transform block additionally transforms filtering coefficients.
9. The method of claim 8 , wherein the filtering coefficients include a transfer domain representation of a time domain filter.
10. A method of joint processing a plurality of digital signal streams, comprising:
transforming a plurality of the digital signal streams from an original domain into a lower complexity processing domain;
joint processing of the transformed plurality of digital signal streams, each of the joint processed digital signal streams being influenced by characteristics of other of the joint processed digital signal streams, wherein the joint processing includes multiplying samples of the plurality of transformed digital signal streams by a processing matrix;
inverse transforming the joint processed signal streams back to the original domain; and
adaptively selecting off-diagonal elements of the processing matrix to cancel transmission crosstalk of the plurality digital signal streams introduced during transmission of the plurality digital signal streams depending upon signal coupling of the plurality of digital signal streams.
11. The method of claim 10 , wherein the joint processing of the transformed plurality of signal streams is performed on signal streams to be transmitted.
12. The method of claim 10 , wherein the joint processing of the transformed plurality signal streams is performed on received signal streams.
13. The method of claim 10 , wherein diagonal elements of the processing matrix are selected to reduce echo coupling between the plurality digital signal streams.
14. The method of claim 10 , wherein the off-diagonal elements of the processing matrix are selected to cancel coupling of the plurality of digital signal streams introduced during transmission of the plurality of digital signal streams.
15. The transceiver of claim 10 , wherein the off-diagonal elements of the processing matrix are selected to cancel transmission cross-talk of the digital signal streams introduced during reception of the digital signal streams.
16. The method of claim 10 , wherein at least one digital signal stream includes time domain processing.
17. The method of claim 10 , wherein the transform block additionally transforms filtering coefficients.
18. The method of claim 16 , wherein the filtering coefficients include a transfer domain representation of a time domain filter.