Method and device for eliminating interference in mobile communication system
View Patent ↗The present invention relates to the field of communication technology, and provides a method and a device for eliminating interference in a mobile communication system. The method comprises: step 1: re-constructing signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer; and step 2: performing interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated. According to the present invention, it is able to eliminate the impact of an interference signal and improve the receptivity of a receiver for a useful signal.
1. A method for eliminating interference in a mobile communication system, comprising:
step 1: re-constructing signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer, wherein
in step 1, the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference is re-constructed by using the equation {circumflex over (d)} MAI+ISI ={circumflex over (d)}{circumflex over (d)} esb )},
wherein A represents a system matrix, function diag(.) represents a matrix generated after a diagonal entry is set to 0; and
step 2: performing interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated.
2. A method for eliminating interference in a mobile communication system, comprising:
step 1: re-constructing signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer; and
step 2: performing interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated, wherein
in step 2, the interference elimination is performed by using the equation {circumflex over (d)} JD+IC (diag(A H A)) −1 ê MF −(diag(A H A)) −1 {circumflex over (d)} MAI+ISI ,
wherein function (.) −1 represents matrix inversion, and function diag(.) represents a matrix generated after an off-diagonal entry is set to 0.
3. A method for eliminating interference in a mobile communication system, comprising:
step 1: re-constructing signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer; and
step 2: performing interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated, wherein
in step 2, the interference elimination is performed by using the equation {circumflex over (d)} JD+IC =(diag(A H A)) −1 (ê MF −{circumflex over (d)} MAI+ISI ),
wherein function (.) −1 represents matrix inversion, and function diag(.) represents a matrix generated after an off-diagonal entry is set to 0.
4. A device for eliminating interference, comprising:
an inter-symbol interference and multi-access interference re-constructor, configured to re-construct signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer, wherein
the inter-symbol interference and multi-access interference re-constructor is configured to re-construct the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference by using the equation {circumflex over (d)} MAI+ISI ={circumflex over (d)}{circumflex over (d)} esb )},
wherein A represents a system matrix, function diag(.) represents a matrix generated after a diagonal entry is set to 0; and
an interference eliminator, configured to perform interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated.
5. A device for eliminating interference, comprising:
an inter-symbol interference and multi-access interference re-constructor, configured to re-construct signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer; and
an interference eliminator, configured to perform interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated, wherein
the interference eliminator is configured to perform interference elimination by using the equation {circumflex over (d)} JD+IC (diag(A H A)) −1 ê MF −(diag(A H A)) −1 {circumflex over (d)} MAI+ISI ,
wherein function (.) −1 represents matrix inversion, and function diag(.) represents a matrix generated after an off-diagonal entry is set to 0.
6. A device for eliminating interference, comprising:
an inter-symbol interference and multi-access interference re-constructor, configured to re-construct signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference in accordance with an output signal {circumflex over (d)} esb from an equalizer; and
an interference eliminator, configured to perform interference elimination on the inter-symbol interference and multi-access interference in an output signal ê MF from a matched filter in accordance with the signal estimation {circumflex over (d)} MAI+ISI of inter-symbol interference and multi-access interference, to obtain signal estimation {circumflex over (d)} JD+IC with the interference eliminated, wherein
the interference eliminator is configured to perform interference elimination by using the equation {circumflex over (d)} JD+IC =(diag(A H A)) −1 (ê MF −{circumflex over (d)} MAI+ISI ),
wherein function (.) −1 represents matrix inversion, and function diag(.) represents a matrix generated after an off-diagonal entry is set to 0.