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A Low Complexity Orthogonal Space Modulation Sphere Decoding and Detection Algorithm with Transmit Diversity

A technology of spherical decoding and transmit diversity, applied in shaping network in transmitter/receiver, preventing/detecting errors through diversity reception, digital transmission system, etc. Large and other problems, to achieve the effect of reducing the complexity of detection

Active Publication Date: 2020-10-16
CHINA JILIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems that the transmission end of the orthogonal space modulation system has no transmit diversity and the ML detection is too complex, the present invention proposes a low-complexity orthogonal space modulation spherical decoding detection algorithm (DQSM-SD) with transmit diversity

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  • A Low Complexity Orthogonal Space Modulation Sphere Decoding and Detection Algorithm with Transmit Diversity
  • A Low Complexity Orthogonal Space Modulation Sphere Decoding and Detection Algorithm with Transmit Diversity
  • A Low Complexity Orthogonal Space Modulation Sphere Decoding and Detection Algorithm with Transmit Diversity

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Embodiment 1

[0047] Take the number of transmitting antennas N t =4, the space matrix dimension T=4, the total number of space matrix Q=4, and the system whose modulation mode is 4QAM is taken as an example. According to the system model, the number of bits used to select the airspace matrix is ​​2, and the number of selection schemes for the airspace matrix is ​​4. Define the selection scheme as a matrix F=[F 1 , F 2 , F 3 , F 4 ], where F q (q=1,2,3,4) is the spatial domain matrix activation scheme. suppose Wherein, "1" indicates that the airspace matrix corresponding to the location is activated and carries constellation modulation symbols, and "0" indicates that the airspace matrix corresponding to the location is not activated.

[0048] 1) The invention firstly searches the composition from the spherical decoding tree figure 2 The root node shown starts to search, and the candidate symbols participating in the search are four constellation symbols and their real and imaginar...

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Abstract

The invention discloses a low-complexity quadrature spatial modulation sphere decoding detection algorithm (DQSM-SD) with a transmitter diversity. According to the method, a traditional QSM activationantenna is converted into an activation space-time matrix to realize the transmitter diversity, and an activation combination of a space-domain matrix is combined simultaneously, a search process oftree sphere decoding can be shortened by increasing a search zero point, and thus the detection complexity can be reduced.

Description

technical field [0001] The invention belongs to the field of communication technology, and relates to a method for constructing a signal at a transmitting end of a wireless communication system and a method for detecting a signal at a receiving end, in particular to a low-complexity orthogonal space modulation spherical decoding detection algorithm (DQSM- SD). Background technique [0002] Quadrature spatial modulation (QSM) not only retains almost all the advantages of SM, but also improves the transmission efficiency of spatial modulation by adding a spatial dimension, that is, loading the real and imaginary parts of the modulation symbol onto two carriers for separate transmission. m, ie m=log 2 (N t 2 M). where N t is the transmission antenna, and M is the dimension of the constellation diagram. At high SNR, QSM performs better than SM. Unlike generalized spatial modulation (GSM) that generates channel interference (Inter channel interference ICI), QSM successfull...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L1/00H04L25/03
CPCH04L1/0052H04L1/0631H04L1/0637H04L25/03242
Inventor 金小萍赵蒙蒙
Owner CHINA JILIANG UNIV