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Low-complexity spatial modulation system detecting method

A spatial modulation, low-complexity technology, applied in electrical components, wireless communications, etc., can solve problems such as high complexity, and achieve the effect of reducing detection complexity and traversal times.

Inactive Publication Date: 2014-08-13
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0003] What the present invention is to solve is to propose a low-complexity spatial modulation system detection method for the high complexity degree problem existing in the traditional ML detection algorithm when the number of transmitting antennas is large and the modulation order is relatively high.

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:

[0014] The space modulation system detection method of the present invention mainly selects a specific subset of the constellation symbol neighborhood, and then performs the first traversal search, thereby determining the bit information for activating the transmitting antenna or having the minimum Euclidean distance according to the selected M minimum Euclidean distance results. The quadrant of the symbol corresponding to the combination of K-distances is used to determine the quadrant of the transmitted symbol, and then a second search is performed. The present invention performs the first traversal through the selection of a specific subset of four quadrants, which can reduce the number of possible detected transmission signals to be searched, thereby effectively reducing the detection complexity of the receiver, and obtaining better Detection performance. ...

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Abstract

The invention relates to the mobile communication technology, in particular to a low-complexity spatial modulation system detecting method. The method mainly includes the steps that specific subsets are selected from a constellation symbol neighbourhood, first-time traversal search is carried out, so that bit information for activating a transmitting antenna is determined according to selected M minimum Euclidean distance results, or the quadrant where a transmitting symbol is located is determined according to the quadrant where the symbol corresponding to the combination with the minimum Euclidean distance is located, and then secondary search is carried out. First-time traversal search is performed on selection of the specific subsets of four quadrants, the number of possible detection sending signals of search can be reduced, so that detection complexity of a receiver is effectively reduced, and good detection performance is obtained under the condition of low complexity. The detecting method is particularly suitable for a spatial modulation system.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a low-complexity space modulation system detection method. Background technique [0002] Spatial Modulation (SM) technology divides a certain number of information bits into two parts, one part is used to select the transmit antenna to be activated, the other part is used to modulate and map into constellation symbols, and the mapped constellation symbols pass through the selected transmit antenna transmits, and the unselected transmit antennas are silent. Using the SM technology can avoid inter-channel interference and transmission antenna synchronization problems existing in a MIMO (Multiple-Input Multiple-Output) system. The SM system only activates one transmitting antenna at a time, and the other transmitting antennas are silent. However, the generalized spatial modulation system (Generalized Spatial Modulation, GSM) technology can select multiple transmitting antennas, a...

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Application Information

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IPC IPC(8): H04W24/02
Inventor 肖悦张云娇范世文何旭李少谦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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