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Detecting algorithm based on planisphere reduction in high order modulation MIMO system

A high-order modulation and detection algorithm technology, applied in baseband system components, diversity/multi-antenna systems, and error prevention/detection through diversity reception, which can solve the problem of high complexity of detection algorithms

Inactive Publication Date: 2014-08-13
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a detection algorithm based on constellation diagram reduction in a high-order modulation MIMO system to solve the problem of high complexity of the detection algorithm in a high-order MIMO system

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  • Detecting algorithm based on planisphere reduction in high order modulation MIMO system
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  • Detecting algorithm based on planisphere reduction in high order modulation MIMO system

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Embodiment Construction

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] The idea of ​​the present invention is to firstly use the extension center to reduce the constellation diagram, then perform tree expansion according to the reduced constellation diagram, and can adaptively select the constellation diagram reduction scheme according to the channel state. By reducing the constellation diagram, the number of child nodes that need to be expanded by the parent node is reduced, thereby reducing the complexity of the detection algorithm. Moreover, a constellation reduction method in the real-valued model is proposed, which makes full use of the advantages of the detection algorithm in the real-valued model. The algorithm in the invention has the advantages of both BER and complexity, and a good compromise between the BER and complexity of the algorithm can be achieved by adjusting parameters, and is a detection algorithm sui...

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Abstract

The invention provides a detecting algorithm based on planisphere reduction in a high order modulation MIMO system. The problem that a detecting algorithm in the high order modulation MIMO system is high in complexity is solved. According to the detecting algorithm, a planisphere is reduced, tree expansion is performed according to the reduced planisphere, and the planisphere reduction scheme can be selected in a self-adaptive mode according to the state of a channel. The advantages of the detecting algorithm in an actual value model are fully used. The simulation results show that the self-adaptive detecting algorithm based on planisphere reduction is low in BER, greatly reduces the complexity of the detecting algorithm and has the advantages in the aspects of the BER and complexity. Compromise between the BER and the complexity of the algorithm can be achieved by adjusting parameters, and the detecting algorithm is suitable for the high order modulation MIMO system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a signal detection algorithm in a MIMO system, in particular to a detection algorithm based on constellation diagram reduction in a high-order modulation MIMO system. Background technique [0002] The next-generation wireless network puts forward higher and higher requirements on the service rate of wireless transmission, and improving the spectrum utilization of MIMO systems has become an urgent and important task. To improve spectrum utilization, the number of data streams multiplexed and the modulation orders employed in MIMO systems have been increasing. In the wireless communication system, the accurate detection algorithm is the key to guarantee the system's superiority, so the research on the detection algorithm has attracted the attention of scholars at home and abroad. [0003] Among various MIMO detection algorithms, the ML detection algorithm can achieve ...

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Application Information

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IPC IPC(8): H04L1/06H04L25/02H04B7/04
Inventor 任品毅马瑞娟杜清河
Owner XI AN JIAOTONG UNIV
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