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Optimal joint distribution method for power of source and relaying nodes in collaborative communication

A relay node and cooperative communication technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as combining power distribution

Inactive Publication Date: 2009-11-25
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

These methods only consider the problem of power allocation between relay nodes and source nodes alone, and do not combine the power allocation of the two from the overall system, and perform joint power allocation from an overall perspective.

Method used

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  • Optimal joint distribution method for power of source and relaying nodes in collaborative communication
  • Optimal joint distribution method for power of source and relaying nodes in collaborative communication
  • Optimal joint distribution method for power of source and relaying nodes in collaborative communication

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Embodiment Construction

[0086] Such as figure 1 As shown, a cooperative communication system model of a sending node with multiple relay nodes and a receiving node, the sending node S and the relay node R i There is only one antenna, and the destination node D is equipped with multiple antennas, so that a virtual MIMO system can be formed between the relay node and the destination node.

[0087] Each user in the system is allocated a unique orthogonal multiple access channel. In this paper, the Amplify-and-Forward relay mode is adopted. All relay nodes work in half-duplex mode. This process is divided into two stage, in the first stage, S broadcasts information through the broadcast channel, at this time R i Only receive but not send, this phase is called the listening phase (Listening Phase), in the second phase, R i Send information to D, and then D combines and decodes the information received in the two phases. This phase is called the Cooperative Phase.

[0088] When performing optimal joint ...

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Abstract

An optimal joint distribution method for the power of source and relaying nodes in the collaborative communication, is used for the wireless communication field. In the invention, under a multiple-relaying -node multiple-receiving-antenna system model, the gross power of the system is rated, first, a water injection algorithm is used to conduct the one-time power distribution for each relaying node according to the second channel hopping state information, then the gross power of the relaying node is taken as the integral, and the gross power of the relaying node and the source nodes is in the power distribution by using the water injection algorithm according to the first channel hopping state information, at this moment, the joint power distribution of all nodes in the one-time system is completed, subsequently, the iterative algorithm is adopted to repeat the mentioned above steps until the iterative required precision reaches, thus reaching the optimal joint power distribution of all nodes in the system and obtaining the optimum channel capacity of the system. The emulation result proves that the optimum joint distribution of the power can obtain further channel capacity, and the iterative algorithm can greatly simplify the complicated degree and the calculation amount of the calculating. the invention is suitable for a future 4G radio communication system widely.

Description

technical field [0001] The invention relates to a method for optimal joint allocation of power, in particular to a method for optimal joint allocation of power between source and relay nodes in cooperative communication, which is used in the future 4G communication field. Background technique [0002] Wireless communication is the fastest growing, most widely used and most cutting-edge communication technology in today's communication field. Wireless networks have developed from narrowband networks for voice and low-speed data services to broadband networks that can support voice, high-speed packet and multimedia services. 4G (or called IMT-Advanced) is also moving from the stage of theoretical discussion and system simulation evaluation to the stage of formulating standards. In order to make full use of the limited wireless resources and pursue the maximum system capacity and QoS guarantee, people are actively researching various new wireless transmission technologies, wir...

Claims

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Application Information

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IPC IPC(8): H04W52/42H04W52/46
Inventor 啜钢刘洪来
Owner BEIJING UNIV OF POSTS & TELECOMM
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