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Method and system for eliminating interference between MIMO relay communication nodes

A relay node, relay communication technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc. question

Active Publication Date: 2014-10-15
SYSU CMU SHUNDE INT JOINT RES INST
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  • Application Information

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Problems solved by technology

However, these methods are only applicable to single-antenna relay nodes, and cannot be directly applied to relay nodes using multi-antenna technology, so that the current amplify-and-forward relay system with multiple antennas still cannot eliminate the relay well. Interference

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  • Method and system for eliminating interference between MIMO relay communication nodes
  • Method and system for eliminating interference between MIMO relay communication nodes
  • Method and system for eliminating interference between MIMO relay communication nodes

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Embodiment Construction

[0055] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:

[0056] Suppose node R i and R j Each location is equipped with M antennas for transmitting and receiving beamforming signals, where M is an integer greater than 2. To simplify the model, it is assumed that the source node S and the destination node D are equipped with a single transmitting antenna and a single receiving antenna respectively. The "coverage blind zone" scenario is a typical scenario in the real network, that is, the signal sent by the source node S cannot directly reach the destination node D due to obstacles (such as tall buildings, etc.) in the transmission process. In this case, the introduction of a relay system can effectively solve the "coverage blind area" problem. A specific implementation manner of the present invention will be described below by taking a "coverage hole" scenario as an example.

[0057] See figure 1 , th...

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Abstract

A method for eliminating interference between MIMO relay communication nodes comprises the steps of obtaining a transmitting beam forming vector ti of a relay node Ri and a transmitting beam forming vector tj of a relay node Rj; respectively obtaining a receiving beam forming vector ci of the relay node Ri and a receiving beam forming vector cj of the relay node Rj; obtaining an amplification factor gamma and obtaining an magnification factor gamma<j> of the relay node Rj through the processing by the combination with the receiving beam forming vector cj and the transmitting beam forming vector ti; calculating and obtaining transmitting beam forming signals of a current time slot of the relay node Rj according to the magnification factor gamma<j> , the receiving beam forming vector cj, the transmitting beam forming vector ti and the transmitting beam forming vector tj; calculating and obtaining transmitting beam forming signals of a current time slot of the relay node Ri through the relay node Ri according to the magnification factor gamma , the receiving beam forming vector ci, the transmitting beam forming vector tj and the transmitting beam forming vector ti; and receiving and demodulating the transmitting beam forming signals through a destination node D. According to the method, IRI between the MIMO relay communication nodes can be restrained greatly. The invention further relates to a correlated system.

Description

technical field [0001] The invention relates to a method and system for eliminating interference between MIMO relay communication nodes. Background technique [0002] The MIMO (Multiple-Input Multiple-Output) system is a core technology used in communication standards such as LTE, WiMAX, and WiFi. It allows multiple antennas to simultaneously transmit and receive multiple spatial streams, and can distinguish distribution Signals to or from different spatial orientations. [0003] In the existing one-way relay technology, the two-way continuous relay technology in half-duplex mode can effectively improve the spectrum efficiency, thus becoming a very attractive system solution. Such as figure 1 As shown, a typical two-way continuous relay system includes a source node S, a destination node D and two fixed relay nodes R 1 , R 2 , the source signal is received and forwarded alternately by two relay nodes. From the perspective of the source node, since the two relay nodes ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04B7/155
Inventor 江明侯伟昆
Owner SYSU CMU SHUNDE INT JOINT RES INST
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