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Adaptive spatial modulation method

A spatial modulation and adaptive technology, applied in the field of communication, can solve the problem of weak anti-interference ability of MIMO system

Inactive Publication Date: 2011-07-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the anti-interference ability of the existing MIMO system based on spatial modulation is weak, and proposes an adaptive spatial modulation method

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Embodiment Construction

[0039] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 As shown, the adaptive spatial modulation method of the present invention specifically includes the following steps:

[0041] Step (1): According to the index information fed back by the receiving end, select the corresponding transmission scheme under the current channel from the set of all alternative adaptive schemes at the transmitting end, that is, the optimal modulation order of each transmitting antenna, and select the transmission data according to The selected transmission scheme is modulated, mapped to the corresponding transmitting antenna unit, and the transmission signal x is obtained, and then transmitted; wherein the set of alternative adaptive schemes is determined according to the current information transmission rate m of the MIMO system, specifically including the following steps:

[0042] Step (11):...

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Abstract

The invention discloses an adaptive spatial modulation method. For the problem of weaker anti-interference capacity of the conventional multiple-input multiple-output (MIMO) system based on spatial modulation, the method comprises the following steps of: taking differences among channels corresponding to each transmitting antenna into full consideration, adjusting a mapping mode of transmitting data according to the state of the channels, namely selecting an optimized adaptive transmission scheme which adapts to the current channel, wherein each MIMO transmitting antenna adopts different modulation modes, namely properly selecting orders of modulation according to the state of the current channel; adopting a high-order modulation scheme when the channel of the transmitting antenna is better; and adopting a low-order modulation scheme when the channel of the transmitting antenna is worse. By adoption of the modulation method provided by the invention, influence on fading of transmitting-receiving channels can be prevented effectively, and the error rate of data transmission is reduced.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a modulation method of a multiple-input-multiple-output system (MIMO, Multiple-Input Multiple-Output). Background technique [0002] Spatial Modulation (SM, Spatial Modulation) is a unique modulation method in multiple input-multiple output systems. It can avoid the problems of inter-channel interference and synchronization between transmitting antenna channels in traditional MIMO systems, and it will become the mainstay of mobile multimedia communications in the future. One of the candidate technologies. [0003] The modulation methods generally used by each transmitting antenna of traditional spatial modulation are BPSK, QPSK and various orders of QAM modulation. For details, please refer to the literature: R.Mesleh, H.Haas, S.Sinanovic, C.W.Ahn, S.Yun, Spatial modulation, IEEE Trans on Vehicular Technology, Vol 57(4), 2228-2241, 2008.07. In the specific mod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06
Inventor 杨平肖悦周彬李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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