Power distributing method for two-jumping multi-antenna relay system
A relay system and distribution method technology, applied in the field of power distribution, can solve problems such as low realizability, high algorithm complexity, and aggravated network signaling load, so as to improve resource utilization, high transmission rate, and performance-cost ratio high effect
Inactive Publication Date: 2010-09-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
The OPA algorithm can maximize the use of limited system resources and increase the system transmission rate, but its complexity is high, and it requires a lot of calculation and signaling interaction, which increases the network signaling load, so the realizability is low.
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[0028] Combine below figure 1 and figure 2 The adaptive power allocation method of the present invention will be described.
[0029] In the first step, the channel condition of the two-hop link is determined according to the structure of the two-hop multi-antenna relay system. The two-hop multi-antenna relay system of the present invention is composed of a signal transmitting end with multiple transmitting antennas, a plurality of repeaters and a single-antenna signal receiving end, wherein each of the repeaters can have one or more root antenna. In the present invention, the first hop channel refers to the multiple-input multiple-output channel from each antenna of the signal transmitting end to each repeater, and the second hop channel refers to the multiple-input single-output channel from each repeater to the signal receiving end . Determining channel information includes determining various factors that affect signals in the wireless propagation process such as propa...
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This invention is a kind of power allocation method for two hops multi-antenna relay system. It concludes: the channel status information of the two hops links are ensured according to the structure of the said two hops multi-antenna relay system; the matrix H of the first hop channel status information is processed the singular value decomposition. The decomposed consequences matrix V, matrix U and diagonal matrix S are respectively fed back to the said signal transmission end, the said relays and the said signal receiving end; the said signal transmission end uses matrix V to preprocess thetransmitted signal t, which is changed to V.t; the said several relays uses matrix U to process the received first hop signal V.t. They also retransmitted the processed signal S.t to the said signal receiving end; based on the channel status information of the two hops links and the diagonal matrix S, with the optimizing rule that the system end-to-end instantaneous information rate achieves maximization, the said signal receiving end calculates the emission power of the first hop link P1 and the emission power of the secondary hop link P2. Thus, the power self-adapting allocation is achieved.
Description
technical field [0001] The invention relates to a power distribution method suitable for a two-hop multi-antenna relay system. Background technique [0002] Future wireless communication systems will be committed to developing data services with higher rates and greater dynamic ranges. At the same time, it is necessary to expand network coverage, improve spectrum efficiency, and increase system robustness. At the same time, mobile terminals need to remain relatively simple and portable. The multi-antenna system can overcome fading in wireless communication, provide better space diversity for the system, and obtain higher capacity. However. Due to the limitation of complexity and size, it is not feasible to implement multi-antenna wireless transmission in mobile terminals. [0003] The multi-antenna relay system can realize a virtual antenna array in the mobile terminal by utilizing the coordinated transmission of the relay and effective antenna sharing, which overcomes th...
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IPC IPC(8): H04B7/145H04B7/04H04B7/005
Inventor 张平张静美王莹邵春菊
Owner BEIJING UNIV OF POSTS & TELECOMM