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Method for designing multi-user signal and energy simultaneous transmission system low complexity transceivers

A technology of simultaneous interpretation and low complexity, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve problems such as poor performance, and achieve the effect of reducing complexity and transmission power

Active Publication Date: 2015-01-28
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

However, the performance of these two methods is far worse than the optimal performance in low and medium signal-to-noise ratio cases

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  • Method for designing multi-user signal and energy simultaneous transmission system low complexity transceivers
  • Method for designing multi-user signal and energy simultaneous transmission system low complexity transceivers
  • Method for designing multi-user signal and energy simultaneous transmission system low complexity transceivers

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Embodiment Construction

[0017] In order to make the above and other objects, features and advantages of the present invention more obvious, further detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0018] 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 (MS) 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 known that the kth user (MS k ) received signal y k for:

[0019] y k = h k H ...

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Abstract

The invention discloses a method for designing multi-user signal and energy simultaneous transmission system low complexity transceivers. The method comprises the following steps that a base station conducts channel estimation to obtain channel vectors between the base station and all users; an interference channel matrix of each user is defined, each interference channel matrix is composed of all channel vectors excerpt the channel vector of the corresponding user, singular value decomposition is conducted on each interference channel matrix to obtain a zero space orthogonal basis matrix, a zero-forcing precode and a maximum joint transmit precode of each user are calculated, and each transmit precode is fixed as the weighted combination of the corresponding zero-forcing precode and the corresponding maximum joint transmit precode; the joint design problem of transmit end precode weights based on transmit power minimizatio, and receiving end power splitting factors is solved through the positive semi-definite relaxation technology to obtain precode weight vectors and the receiving end power splitting factors; finally, the base station conducts precoding on emission signals and sends the power splitting factors to the corresponding users through control channels at the same time. The method reduces the transmit power and also lowers the calculation complexity.

Description

technical field [0001] The invention relates to wireless communication transmission technology, in particular to a joint design method of low-complexity transmission precoding and receiving power splitting factor in the downlink of a multi-user MISO (Multiple Input Single Output) wireless signal energy simultaneous transmission system. Background technique [0002] With the increasingly serious environmental and energy issues, green communication technology has become an important topic in today's communication industry. As a potential green energy source, radio waves can not only transmit information, but also transmit energy. Its dual role is gradually entering people's sight. At the same time, this communication system that transmits information and energy at the same time not only reduces communication energy consumption, Moreover, the effective use of new energy will undoubtedly be the key research goal of the communication industry in the future. Therefore, due to its...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L25/02H04L25/03
CPCH04B7/0426H04B7/0456H04L25/0204
Inventor 史清江彭成徐伟强胡冰心
Owner ZHEJIANG SCI-TECH UNIV
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