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A low-complexity differential orthogonal spatial modulation detection method

An orthogonal space and detection method technology, applied in the field of communication, can solve problems such as high complexity

Pending Publication Date: 2019-05-28
CHINA JILIANG UNIV
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Problems solved by technology

In this regard, the maximum likelihood (ML) detection algorithm of DQSM is proposed, which has excellent performance, but requires traversal search, which is extremely complex

Method used

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  • A low-complexity differential orthogonal spatial modulation detection method
  • A low-complexity differential orthogonal spatial modulation detection method
  • A low-complexity differential orthogonal spatial modulation detection method

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Embodiment Construction

[0032] A low-complexity differential orthogonal spatial modulation detection method adopted in the present invention is:

[0033] First, the algorithm splits the received signal matrix into a column vector received signal matrix at the receiving end, and then estimates the transmit antenna index sequence and transmit symbols step by step. Among them, according to the signal construction characteristics of the differential quadrature modulation system, the transmitting antenna needs to be considered in two different cases. In the first case, it is assumed that only one antenna is active, which means that the real and imaginary parts of the transmitted symbols are sent through the same antenna. In the second case, it is assumed that the real and imaginary parts of the transmitted symbols are sent through two different transmit antennas. On the basis of adopting the above-mentioned technical scheme, describe the method of the present invention in detail:

[0034] The differenti...

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Abstract

The invention discloses a low-complexity differential orthogonal spatial modulation detection method (referred to as an LC-DQSM algorithm for short), and the method comprises the steps: on the basis of splitting a received signal matrix into signal vectors, estimating a transmitting antenna index sequence and a transmitting symbol step by step by considering one or two conditions of an activated antenna; Wherein in the first case, a signal vector detection idea is adopted, and in the second case, an improved block sorting minimum mean square error idea is adopted for detection. Simulation results show that on the premise that algorithm performance is guaranteed, Compared with a maximum likelihood detection (ML) algorithm, the LC-DQSM algorithm has the advantage that the complexity is greatly reduced.

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 line system, in particular to a low-complexity differential orthogonal space modulation detection method. Background technique [0002] Quadrature spatial modulation (QSM, quadrature spatial modulation) is a new type of multiple input multiple output (MIMO, multiple input multiple output) wireless communication technology, which improves the overall spectrum efficiency by expanding the spatial constellation diagram, while retaining all the advantages of SM . Channel state information (CSI, channel state information) is crucial in QSM, because part of the data is encoded using the Euclidean distance difference between different channel paths. Differential spatial modulation (DSM, differential spatial modulation) completely eliminates the need for any CSI at the receiver, while also retaining the advan...

Claims

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Application Information

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IPC IPC(8): H04B7/08H04B7/06H04L1/06
Inventor 金小萍李倩
Owner CHINA JILIANG UNIV
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