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Method for optimizing multipoint cooperation dual energy efficiency transmission

A multi-point coordination and transmission optimization technology, applied in diversity/multi-antenna systems, space transmit diversity, power management, etc., can solve problems that are difficult to solve and do not take dual characteristics into account

Active Publication Date: 2014-06-04
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

The energy efficiency problem under power constraints is a non-convex problem, and it is difficult to solve. At present, the design of beamforming and power allocation methods mainly focuses on converting it into a corresponding easy-to-solve convex problem through iteration and bounding methods, and The dual characteristics of uplink and downlink are not taken into account. Therefore, the present invention designs a joint beam and power allocation method of cooperative multi-cells utilizing uplink and downlink duality based on energy-efficient transmission.

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  • Method for optimizing multipoint cooperation dual energy efficiency transmission

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Embodiment Construction

[0058] The theoretical basis on which the present invention is based shows: for a power-constrained multi-user downlink system, with energy efficiency maximization as the optimization goal, the expression for defining energy efficiency is as follows:

[0059] f → ( w ) = Σ m = 1 N ‾ a m R → m ξ Σ m = 1 N ‾ p ...

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Abstract

The invention discloses a method for optimizing multipoint cooperation dual energy efficiency transmission. According to the optimization target of the method, energy efficiency under the constraint of given single base station power and the given signal interference noise ratio is maximized. Firstly, duality with uplink and downlink transmission is introduced into optimization of the energy efficiency, a corresponding energy efficiency optimization objection function is set, and a virtual uplink problem dual with the downlink transmission is introduced in. Then, the virtual uplink transmission problem is solved through GP optimization, then, a corresponding uplink optimization result is transformed into the solution of an original downlink transmission problem, therefore, the energy efficiency transmission problem of multiple downlink users is solved, and an optimized beam vector and power distribution method is obtained. Compared with an existing beam forming and power distribution method considering the energy efficiency, the method is low in computing complexity and easy to implement, the feedback quantity needed in an actual system is small, and implementation is easy.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-point cooperative dual energy-efficiency transmission optimization method. Background technique [0002] With the development of communication technology and equipment, the amount of data transmitted wirelessly increases dramatically, which also causes a significant increase in corresponding energy consumption. In the past, multi-antenna transmission has been widely used as a method to effectively improve the spectral efficiency of the system, and the large-scale antennas derived therefrom can improve the energy efficiency of the system. Energy efficiency is generally defined as the ratio of system and rate to total power loss. Recently, using cell beamforming and power control methods to suppress and solve energy efficiency problems in downlink multi-user multi-antenna systems has become a major research focus in the field of wireless communica...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W52/42H04W72/04
Inventor 何世文陈文阳黄永明王海明
Owner SOUTHEAST UNIV