Energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method

A technology of simultaneous communication and design method, which is applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., and can solve problems such as ignoring performance indicators of green communication systems

Active Publication Date: 2015-08-05
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

[0003] However, in the initial stage of research, most of the existing research work aimed at improving spectrum efficiency, and conducted a lot of research on carrier allocation, power allocation, beamforming / precoding and other methods of multi-carrier and multi-antenna systems, but neglected green communication. An important performance index in system design - energy efficiency, referred to as energy efficiency

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  • Energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method
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  • Energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method

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[0047] The purpose and effects of the present invention will become more apparent by describing the present invention in detail below in conjunction with the accompanying drawings.

[0048] Such as figure 1 As shown, in this system model, it is assumed that the number of base station (BS) (or access point) antennas is N t (N t >0), the base station uses the transmission precoding (or transmission beamforming vector) v k , k=1,...,K, transmit symbol s to K single-antenna receivers k , k=1,...,K, however, unlike the traditional multi-user MISO system, the signal received by the user will be split into two parts, one part is used for information decoding, and the other part is used for energy harvesting. From this channel model, it can be seen that the signal y received by the kth user before power splitting k for:

[0049] y k = h k H ( Σ ...

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Abstract

The invention discloses an energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method. According to the energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design method of the invention, the lagrangian relaxation technology is adopted to decompose a complex energy efficiency maximization-based multi-user information and energy simultaneous transmission transceiver design problem into a series of sub problems with closed-form solutions, namely, the design method includes the following steps that: equivalent variation is performed on total power constraints of transmission, and lagrangian multipliers are led into equivalent power constraints, so that a part of a lagrangian function and corresponding dual problems can be obtained; the dichotomy and Dinkelbach method are utilized to solve the dual problems, so that optimal energy efficiency can be obtained; and finally a base station obtains pre-coding vectors corresponding to the maximum efficiency and transmits receiving power splitting factors to a user through a control channel. Based on the above steps, information and energy simultaneous transmission transceiver design can be completed, and energy efficiency maximization can be realized when information and energy simultaneous transmission is realized.

Description

technical field [0001] The invention relates to the technical field of green wireless communication transmission, and specifically relates to the design of an energy efficiency maximization optimization scheme in a multi-user MISO (Multiple Input Single Output) wireless signal energy simultaneous transmission downlink system. Background technique [0002] With the rapid development of wireless network technology, radio frequency (RF) signals have attracted great attention from scholars at home and abroad because of their dual roles of not only transmitting information but also transmitting energy. In terms of green communication, the emergence of this technology provides an effective and promising solution to the more complex power and energy constraints in wireless networks at the present stage. So people began to work on the wireless signal energy simultaneous interpretation system, that is, the research on the system that can transmit both information and energy. [0003...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B7/04
CPCH04B7/02H04B7/024H04B7/04H04B7/0413H04B7/0426Y02D30/70
Inventor 史清江彭成徐伟强
Owner ZHEJIANG SCI-TECH UNIV
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