Wireless sensor network collaboration diversity scheme based on distributed space time packet coding and decoding forward

A technology of wireless sensor network and space-time block coding, which is applied in the field of wireless sensing, can solve problems such as difficulty in synchronous coordination, low diversity efficiency, complex design, etc., and achieve good collaboration effect, high diversity gain, and simple effect

Inactive Publication Date: 2008-08-06
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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Problems solved by technology

In order to effectively solve the problems of complex design, difficult implementation, low diversity efficiency, and difficult synchronous coordination of the existing synergy schemes such as amplification and forwarding, de...

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  • Wireless sensor network collaboration diversity scheme based on distributed space time packet coding and decoding forward
  • Wireless sensor network collaboration diversity scheme based on distributed space time packet coding and decoding forward
  • Wireless sensor network collaboration diversity scheme based on distributed space time packet coding and decoding forward

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Embodiment Construction

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] As shown in Figure 1, the large-scale single-antenna sensor network nodes have been clustered according to a certain mechanism. The dotted box in the figure represents a cluster in the network, the circle represents the sensor network node, and the hexagon is the source node. , the square is the partner node, and the octagon is the gathering node of the sensor network node data, that is, the sink, which can be multi-antenna or single-antenna.

[0021] Figure 2 shows the situation of single-partner cooperative communication. In the first time slot, the source node divides the original data into data frames x with a length of 2n 11 x 12 x 21 x 22 …x n1 x n2 , and encoded into x by the first row of the Alamouti encoding matrix 11 , -x 12 * , x 21 , -x 22 * ,...x n1 , -x n2 * In the second time slot, the partner node decodes the received ...

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Abstract

The invention discloses a cooperative diversity scheme for wireless sensor networks based on the decoding and forwarding of distributed space-time codes, which comprises cluster head determination, cooperative establishment, time-slot planning and data transmission. The cooperative diversity scheme effectively solves the problems that a plurality of prior cooperative schemes such as amplify-and-forward, decode-and-forward, coded cooperation and so on have complicated design, difficult realization, low diversity efficiency, difficult cooperative synchronization and so on, effectively improves the frequency spectrum efficiency and the energy efficiency of the system, and greatly decreases the system energy consumption of the wireless sensor networks.

Description

technical field [0001] The invention belongs to the field of wireless sensing, and specifically proposes a wireless sensor network cooperative diversity scheme based on distributed space-time block code decoding and forwarding. Background technique [0002] Wireless sensor network is a network system that integrates information monitoring, data processing and wireless communication. There are thousands of nodes randomly arranged, and the distribution is relatively dense, especially for wireless sensor networks such as military reconnaissance, environmental monitoring, and public safety. Generally larger, the node is prone to failure, resulting in changes in the network topology. At the same time, energy limitation is an important feature of wireless sensor networks. How to minimize the energy consumption of sensor network nodes is an important research topic in wireless sensor networks. At present, the energy-limited single-antenna sensor network nodes are effectively coord...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L12/56H04L12/28
CPCY02B60/50H04B7/026H04B7/0669H04W84/18Y02D30/70
Inventor 邱云周刘海涛王营冠丁盛严凯
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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