Interference reduction apparatus and interference reduction method thereof
AssigneeInstitute for Information Industry
InventorsChun-Che CHIEN, Tsung-Yu TSAI, Yi-Ting LIN
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Abstract
The present invention relates to an interference reduction apparatus, an interference reduction method and a computer storage medium. The interference reduction apparatus can estimates the channel of the cells comprehensively to obtain the combination information and the interference power level information. The combination information and the interference power level information is used to combine at least one precoding matrix of he codebook with each other to generate a combined precoding matrix which acts as the strongest signal power from the interference reduction apparatus and the weakest interference from the neighboring cells.
Claims18
An interference reduction apparatus for use in a first cell adapted for a multi-input multi-output (MIMO) network, the MIMO network comprising a second cell and a third cell adjacent to the first cell, the first cell comprising an operation apparatus communicating with the interference reduction apparatus via a first serving channel and estimating the first serving channel, at least one second interfering channel of the second cell and at least one third interfering channel of the third cell to generate a first feedback signal according to a first codebook of the operation apparatus, the first feedback signal comprising first preferred matrix index (PMI) selection information and first combination information, the second cell sharing a second feedback signal comprising second PMI selection information and second combination information with the first cell, the third cell sharing a third feedback signal comprising third PMI selection information and third combination information with the first cell, the interference reduction apparatus comprising:
- a transceiver, being configured to receive the first feedback signal, the second feedback signal and the third feedback signal;
- a storage, being configured to store a second codebook;
- and
- a processor, being electrically connected to the storage and the transceiver, and being configured to retrieve the first combination information and the first PMI selection information from the first feedback signal, retrieve the second combination information and the second PMI selection information from the second feedback signal, retrieve the third combination information and the third PMI selection information from the third feedback signal, and combine at least one precoding matrix of the second codebook with each other according to the first combination information, the first PMI selection information, the second PMI selection information, the second combination information, the third PMI selection information and the third combination information to generate a combined precoding matrix;
- wherein the transceiver is further configure to proceed a signal transmission with the operation apparatus according to the combined precoding matrix, and share the first combination information and the first PMI information with the second cell and the third cell.
An interference reduction method for use in an interference reduction apparatus adapted for a first cell of an MIMO network, the MIMO network comprising a second cell and a third cell adjacent to the first cell, the first cell comprising an operation apparatus communicating with the interference reduction apparatus via a first serving channel and estimating the first serving channel, at least one second interfering channel of the second cell and at least one third interfering channel of the third cell to generate a first feedback signal according to a first codebook of the operation apparatus, the first feedback signal comprising first preferred matrix index (PMI) selection information and first combination information, the second cell sharing a second feedback signal comprising second PMI selection information and second combination information with the first cell, the third cell sharing a third feedback signal comprising third PMI selection information and third combination information with the first cell, the interference reduction apparatus comprising a transceiver, a storage and a processor, the processor being electrically connected to the storage and the transceiver, the storage storing a second codebook, the interference reduction method comprising the steps of:
- (a) enabling the transceiver to receive the first feedback signal, the second feedback signal and the third feedback signal;
- (b) enabling the processor to retrieve the first combination information and the first PMI selection information from the first feedback signal;
- (c) enabling the processor to retrieve the second combination information and the second PMI selection information from the second feedback signal;
- (d) enabling the processor to retrieve the third combination information and the third PMI selection information from the third feedback signal;
- (e) enabling the processor to combine at least one precoding matrix of the second codebook with each other according to the first combination information, the first PMI selection information, the second PMI selection information, the second combination information, the third PMI selection information and the third combination information to generate a combined precoding matrix;
- (f) enabling the transceiver to proceed a signal transmission with the operation apparatus according to the combined precoding matrix;
- and
- (g) enabling the transceiver to share the first combination information and the first PMI information with the second cell and the third cell.
Dependencies are inferred from the claim text.