3D 64QAM trellis coded modulation method and 3D 64QAM trellis coded modulation system applicable to wireless sensor network
A trellis coded modulation, wireless sensor technology, applied in the modulation carrier system, transmission system, digital transmission system and other directions, can solve the problem of signal constellation limitation and so on
Inactive Publication Date: 2016-05-04
CHINA UNIV OF GEOSCIENCES (WUHAN)
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However, in all digital communication systems currently being applied, most of the signal constellation diagrams are still limited to two-dimensional space, that is to say, signal points are only distributed in a two-dimensional plane
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[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0041] like figure 1 As shown, the three-dimensional 64QAM lattice coding modulation method applicable to wireless sensor networks in the embodiment of the present invention, the specific steps are:
[0042] S1. Symmetrically decompose the signal space of a three-dimensional 64QAM lattice constellation diagram into 8 signal subspaces, each of which is a cube;
[0043] like figure 2 As shown, a cube of a three-dimensional 64QAM lattice constellation diagram is symmetrically extracted with eight constellation points every other constellation point to form a signal subspace of eight cubes, and the ...
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The invention discloses a 3D 64QAM trellis coded modulation method and a 3D 64QAM trellis coded modulation system applicable to a wireless sensor network. The method comprises the following steps: S1, symmetrically decomposing the signal space of a 3D 64QAM trellis constellation graph into 8 signal sub-spaces, wherein each signal sub-space is a cube; and S2, using a 8-state 64QAM trellis coded modulator to modulate signals according to the decomposition scheme of the 3D 64QAM trellis constellation graph. According to the invention, the free Euclidean distance between the constellation points in the signal space can be increased, and certain demodulation gain can be obtained. Compared with the traditional modulation technology, the method is of lower bit error rate. A lower-power and more reliable wireless communication technology is provided for an energy-sensitive wireless sensor network.
Description
technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a three-dimensional 64QAM grid coding modulation method and system suitable for wireless sensor networks. Background technique [0002] Wireless sensor network is one of the core technologies in the application of the Internet of Things. Wireless sensor network is very useful in the construction of short-distance high-speed network, and can be widely used in military communication, geological disaster monitoring, emergency rescue and disaster relief, and environmental monitoring. , space exploration, and other commercial applications. Wireless sensor network is a special large-scale self-organizing network, which has the characteristics of self-organization, rapid deployment, mobility and multi-hop. Wireless sensor networks are generally powered by batteries in the wild environment, and the power of the battery is mainly the communication power consumption. The ...
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IPC IPC(8): H04L1/00H04L27/34H04W84/18
CPCH04L1/006H04L27/3405H04L27/3483H04W84/18Y02D30/70
Inventor 陈分雄付杰胡凯凌承昆王典洪颜学杰袁学剑
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)