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Adaptive generalized spatial modulation (AGSM) method using joint optimization

A generalized spatial modulation and spatial modulation technology, applied in the application field of link adaptation technology in generalized spatial modulation system

Active Publication Date: 2016-12-07
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, most of the various adaptive technologies proposed so far are based on the SM system, and there are few studies on applying this closed-loop feedback mechanism to the GSM system to improve the BER performance of the GSM system.

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  • Adaptive generalized spatial modulation (AGSM) method using joint optimization
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  • Adaptive generalized spatial modulation (AGSM) method using joint optimization

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Embodiment Construction

[0037] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0038] The present invention proposes an adaptive generalized space modulation method (AGSM) for joint optimization of antenna combination and symbol modulation constellation. Compared with the traditional GSM technology, the method can effectively use channel state information (CSI) to improve the BER performance of the GSM system. In addition, considering the high complexity of this method, a low-complexity Adaptive Generalized Spatial Modulation method (L-AGSM) is further proposed. Analysis and simulation results show that this algorithm can not only greatly improve the BER performance of GSM system, but also has small feedback and simple calculation.

[0039] In order to achieve the above purpose, th...

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Abstract

The invention claims an adaptive generalized spatial modulation (AGSM) method using joint optimization, and belongs to the technical field of wireless communication. The provided method comprises the steps that symbol modulation constellations are combined with traditional GSM antenna assemblies to form space modulation constellations; a receiving end selects the optimal space modulation constellation under a channel condition according to channel condition information, and feeds the space modulation constellation back to a sending end; and the sending end adopts the space modulation constellation to implement bit mapping in next transmission. Furthermore, an AGSM simplified computation method is provided, the optimal space modulation constellation is selected via an local optimal selection way, and computation times for a Euclidean distance in AGSM can be effectively reduced. Compared with the traditional GSM system, the provided method can effectively enhance BER performance of the system, the feedback quantity is small, and the computation is simple.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to the application of link adaptive technology in generalized space modulation system. Background technique [0002] As a new Multiple Input Multiple Output (MIMO) antenna technology, Spatial Modulation (SM) has gained widespread attention in the field of wireless communication. However, because the traditional SM technology only activates one antenna to transmit data at the sending end, its transmission rate is significantly lower than the spatial multiplexing technology in the traditional MIMO system. In order to solve this shortcoming of the SM technology, a generalized spatial modulation (Generalized Spatial Modulation, GSM) technology is proposed. [0003] As an extension of SM technology, in the GSM system, each time slot can activate multiple transmit antennas to send modulation symbols, and the antenna combination index and modulation symbols join...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/06
CPCH04B7/0413H04B7/0626
Inventor 陈发堂查凡超李小文王丹王华华刘宇
Owner CHONGQING UNIV OF POSTS & TELECOMM
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