Traversal generation method of multi-circle APM digital modulation constellation in spatial modulation system

A space modulation and digital modulation technology, applied in space transmit diversity, diversity/multi-antenna systems, preventing/detecting errors through diversity reception, etc., can solve problems such as performance loss and unreasonable design

Active Publication Date: 2015-06-10
WEIFANG UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the method proposed in this patent application still has limitations in the design of the APM digital modulation constellation, especially too many restrictive conditions, which will easily lead to unreasonable design, resulting in unnecessary performance loss

Method used

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  • Traversal generation method of multi-circle APM digital modulation constellation in spatial modulation system
  • Traversal generation method of multi-circle APM digital modulation constellation in spatial modulation system
  • Traversal generation method of multi-circle APM digital modulation constellation in spatial modulation system

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Embodiment 1

[0040] A method for ergodic generation of a multi-turn APM digital modulation constellation in a space modulation system, suitable for a space modulation transmission system constructed by a transmitter and a receiver, the digital modulation constellation generator included in the transmitter is responsible for completing the multi-turn APM digital modulation The generation of the modulation constellation is as follows: the transmitter of the space modulation transmission system first obtains the basic parameters of the space modulation transmission system, including the number of transmitting antennas Nt, whose value is equal to the power of 2; the number of receiving antennas Nr, Nr is greater than or equal to An integer of 1; the total number of bits M sent by the system in each time slot, thus determining the size of the constellation diagram, that is, L=2 M / Nt, all parameters need to be obtained through parameter interaction in the user access stage before the system impl...

Embodiment 2

[0068] Embodiment 2 of the present invention is the same as Embodiment 1, just select Nt=4, Nr=4, L=64, as figure 2 As shown, the number of subdivision steps of the constellation diagram is set to S=100, and the maximum number of circles is 4. exist figure 2 , the points distribution of the new APM modulation constellation is [N 1 ,N 2 ,N 3 ,N 4 ]=[7,14,19,24], the radius is [r 1 ,r 2 ,r 3 ,r 4 ]=[0.35,0.657,0.9638,1.2821], the signal constellation point phase is: the first circle, θ 1 , u = 2 π 7 ( u - 1 ) , u = 1,2 , . . . , 7 ; second lap, θ 2 , u ...

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Abstract

The invention discloses a traversal generation method of a multi-circle APM digital modulation constellation in a spatial modulation system. The APM digital modulation constellation generated by use of the method has a multi-circle structure; the constellation points in each circle conform to a traditional PSK modulation constellation of equiphase interval distribution; the signal constellation points in adjacent circles satisfy the condition of maximization of the minimum phase difference. The traversal method comprises the specific steps of 1, traversing the number of circles, 2, traversing the number of points in each circle, and 3, traversing the radius of each circle; in the traversing process, constellation preference is realized according to a measurement formula, and meanwhile, the traversing process is accelerated effectively by use of the measurement formula. The traversal generation method is capable of effectively obtaining the multi-circle APM digital modulation constellation and guaranteeing that the new APM modulation constellation is superior to the traditional PSK and QAM digital modulation constellations in performance. The APM digital modulation constellation can be generated once at the initial configuration stage of the system without causing extra influence and overhead to the actual transmission process of the system, and has a higher practical value and a better positive effect.

Description

technical field [0001] The invention relates to an ergodic generation method of a multi-circle APM digital modulation constellation in a space modulation system, and belongs to the technical field of wireless communication transmission. Background technique [0002] Spatial modulation technology is a newly proposed multi-antenna transmission technology, which maps a part of the information bits to be transmitted to a digital modulation constellation, and maps the other part to one or more transmitting antennas in space. Since only one or a few transmit antennas work in each time slot, compared with the traditional multi-antenna transmission technology, spatial modulation has many advantages, such as reducing the cost of radio frequency links, effectively solving the inter-carrier interference caused by multi-antenna transmission and Synchronization issues between antennas, etc. Therefore, since the spatial modulation technology was proposed, it has quickly become one of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/04
Inventor 张彭王成端高进陈光军
Owner WEIFANG UNIVERSITY
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