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A Differential Spatial Modulation Method Combined with Space-Time Block Code

A space-time block code, spatial modulation technology, applied in the direction of error prevention, error prevention/detection through diversity reception, digital transmission system, etc., can solve the problems of impossible realization, performance loss, etc., to achieve the effect of improving system performance

Inactive Publication Date: 2021-03-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, when the number of transmitting antennas is 32, the size of the antenna transmission matrix is ​​2117, making it almost impossible to realize in practical applications
At the same time, the performance of differential spatial modulation is lost compared to spatial modulation because the receiving end detects the transmitted information without channel information.

Method used

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  • A Differential Spatial Modulation Method Combined with Space-Time Block Code
  • A Differential Spatial Modulation Method Combined with Space-Time Block Code
  • A Differential Spatial Modulation Method Combined with Space-Time Block Code

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment, describe technical solution of the present invention in detail:

[0021] Suppose the differential spatial modulation system has N t = 4 transmit antennas, the number of active antennas in each time slot is 2, and the QPSK modulation mode is adopted; then the bits transmitted in each time slot are Assume that the bits transmitted in the i=7 and i=8 time slots are Transmit vectors transmitted in i=5 and i=6 slots

[0022] Step 1: Get N first t / 2 set of RDSM antenna transmission vectors

[0023] Step 2: Put a 1 and a 2 The element 1 in is expanded into a 2×2 identity matrix, and the element 0 is expanded into a 2×2 zero matrix, and the antenna transmission matrix is ​​obtained as bits (0) are used to select the transmit antenna matrix

[0024] Step 3: The bits are used to modulate into two M-PSK constellation symbols 0.7071-0.7071i and 0.7071-0.7071i, which form a space-time coding matrix T...

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Abstract

The invention belongs to the technical field of wireless communication, and specifically relates to a differential spatial modulation method combining space-time block codes. In the proposed differential spatial modulation technology based on space-time coding, the information is transmitted jointly by an activated antenna matrix index and constellation symbols together. The bit information is transmitted by a rectangular differential matrix instead of the traditional square differential matrix , thereby avoiding the problem that the traditional differential system is difficult to be practically used with the increase of antennas and the rapid increase of transmitting antenna matrixes. Meanwhile, the characteristics of the space-time coding and the traditional differential spatial modulation are effectively combined, and the diversity gain brought by the space-time coding can be effectively obtained while preserving the characteristics of the traditional differential spatial modulation.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, specifically a novel differential spatial modulation scheme combined with space-time block coding; the invention relates to differential spatial modulation (Differential spatial modulation, DSM), space-time block coding (Space-time block coding , STBC) and MIMO (Multiple Input Multiple Output, MIMO) and other technologies. Background technique [0002] Differential spatial modulation technology is a new type of MIMO technology based on spatial modulation technology using non-coherent detection. The transmitter uses the activated transmit antenna matrix index and constellation symbol to transmit information. Therefore, in addition to retaining the characteristics of the traditional spatial modulation single radio frequency, the differential spatial modulation can accurately recover the transmitted information at the receiving end without channel information by performing differenti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04L1/06
CPCH04B7/0413H04L1/0612H04L1/0618
Inventor 吴朝武肖丽霞肖悦王金福
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA