Power distribution incoherent spatial modulation system based on APSK modulation

A space modulation, non-coherent technology, applied in the field of communication, to achieve the effect of excellent bit error rate performance

Inactive Publication Date: 2020-04-10
CHINA JILIANG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, compared to coherent detection, the NCSM system using a priori transport block estimates to remove the limitation of CSI incurs a penalty of about 3dB

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  • Power distribution incoherent spatial modulation system based on APSK modulation
  • Power distribution incoherent spatial modulation system based on APSK modulation
  • Power distribution incoherent spatial modulation system based on APSK modulation

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Embodiment Construction

[0039] The technical scheme of the present invention will be further described in detail below.

[0040] A non-coherent spatial modulation system scheme for power distribution based on APSK modulation adopted by the present invention is: for a system with N t root transmit antenna and N rThe digital modulation method adopts M-order APSK non-coherent spatial modulation system. At the transmitting end, the input information bit stream is divided into two parts, which are used to select the antenna index matrix k 1 Bits and k mapped to modulation symbols after APSK modulation 2 bits, the total number of bits per block is Modulation symbols mapped by M-APSK

[0041] At the receiving end, the receiving matrix of block d for:

[0042] Y d =H d S d +N d (1)

[0043] in, is an emission matrix and S d There is only one non-zero element in any row and any column, which meets the requirement of activating different antennas in different time slots to transmit a single s...

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Abstract

The invention discloses a power distribution incoherent spatial modulation system based on APSK modulation. According to the system, a new power distribution concept is adopted, a transmission data frame is divided into a reference block and K normal blocks, the reference block provides channel estimation for the normal blocks in the frame, the normal blocks are used for transmitting information,and the power distributed to the reference block is larger than the power of the normal blocks by adopting a power distribution method; according to the method provided by the invention, the problem that about 3dB loss can be generated when an NCSM (Non-Coherent Space Modulation) eliminates the limitation of CSI (Channel State Information) can be effectively solved. A simulation result proves thatthe bit error rate performance of the new APSK power distribution incoherent space modulation system scheme (Power-NCSM, P-NCSM) provided by the invention is superior to that of a traditional incoherent space modulation system based on APSK.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a signal detection method at a receiving end of a wireless communication system, in particular to a power distribution non-coherent space modulation system based on APSK modulation. Background technique [0002] Differential Spatial Modulation (DSM) is a new type of Multiple Input Multiple Output (MIMO) wireless communication technology, which has a single pilot structure and does not require channel state information. Therefore, DSM is a powerful alternative to coherent spatial modulation (Spatial Modulation, SM), and it is considered to be a promising transmission technology for massive MIMO systems in terms of theoretical research and practical applications. [0003] PSK modulation has equal amplitude for all constellation points, so DSM adopts PSK modulation in most cases to meet the closed property of the differential modulation mechanism necessary for transport block...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0426H04B7/08H04B17/391H04L27/34H04L27/38
CPCH04B7/0426H04B7/0854H04B7/0857H04B17/3911H04L27/3483H04L27/3845
Inventor 金小萍吴青
Owner CHINA JILIANG UNIV
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