An Antenna Selection-Power Adaptive Spatial Modulation Method

An antenna selection and self-adaptation technology, applied in the field of communication, can solve the problems of weak anti-interference ability of MIMO system, increasing the minimum Euclidean distance between constellation points, etc.

Inactive Publication Date: 2018-12-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing MIMO system based on transmit antenna selection space modulation has weak anti-interference ability, and proposes a transmit antenna selection-power adaptive space modulation method. The optimal power allocation scheme is selected from the set of adaptive power allocation schemes and fed back to the transmitter, so that the transmitter can adaptively adjust the transmission scheme, which is conducive to increasing the minimum Euclidean distance between constellation points, thereby further reducing the bit error rate of the system , to improve the performance of the space modulation communication system

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[0051] The specific embodiments of the present invention will be given below in conjunction with the accompanying drawings; it should be noted that the parameters in the embodiments do not affect the generality of the present invention.

[0052] Assume that the information transmission rate of the transmitter is m=3 bits / time, and the number of antennas at the transmitter is N t = 2, the number of antennas at the receiving end N r =1, considering that the modulation mode is 4-QAM, that is, the constellation point set D={-0.7071-0.7071i,-0.7071+0.7071i,0.7071-0.7071i,0.7071+0.7071i}. Alternative power transfer schemes are as follows:

[0053] Φ={diag([p 11 ,p 12 ]),diag([p 21 ,p 22 ]),...,diag([p r1 ,p r2 ])}

[0054] in, p ik >0, here we assume that the initial value is p 11 =1.9,p 12 =0.1, final value p r1 =0.1,p 12 =1.9, The step size Δ=0.1, that is, p i1 =p 11 -(i-1)Δ,p i2 =p 12 +(i-1)Δ.

[0055] Then for each scheme of the candidate power allocation s...

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Abstract

The present invention belongs to the field of communication technology, and provides an antenna selection-power adaptive spatial modulation method, which is used to solve the problem of weak anti-interference ability of the existing transmitting antenna selection spatial modulation MIMO system. The receiving end of the present invention By calculating the minimum Euclidean distance between equivalent constellation points under each group of alternative power allocation schemes, and then selecting the alternative power allocation scheme with the largest minimum Euclidean distance from the scheme set as the most optimal power allocation scheme, And feed back to the transmitting end to equivalent the transmission channel matrix H based on norm antenna selection, obtain a new transmission scheme, increase the minimum Euclidean distance between constellation points, effectively reduce the bit error rate of data transmission, and further improve The performance of spatially modulated communication systems.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) adaptive method, specifically a transmitting antenna selection-power adaptive spatial modulation method. Background technique [0002] Spatial Modulation (SM, Spatial Modulation) is a unique modulation method in multiple input-multiple output systems. It can effectively avoid inter-channel interference and channel synchronization problems between transmitting antennas in traditional MIMO systems, and has become a key factor in future mobile communications. one of the main candidate technologies. [0003] The antenna selection algorithm based on the optimal capacity of the traditional spatial modulation system selects the transmission vector with the largest norm. For details, please refer to: Rajashekar R, Hari K V S, Hanzo L. Antenna selection inspatial modulation systems, IEEE Communicatio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/36H04L25/02H04B7/06
CPCH04B7/061H04L25/021H04L27/36Y02D30/70
Inventor 邵晋梁尹露肖悦王顺顺
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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