Broadband wireless sensor network transmission scheme based on collaborative communication of amplification forward single node

A sensor network and cooperative communication technology, applied in diversity/multi-antenna systems, preventing/detecting errors through diversity reception, comprehensive factory control, etc., can solve problems that are not suitable for multi-antennas, achieve low information processing complexity, and improve Bit error rate performance, the effect of strong practicability

Inactive Publication Date: 2008-08-06
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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  • Application Information

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Problems solved by technology

However, due to the influence of factors such as the price and volume of terminal equipment,

Method used

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  • Broadband wireless sensor network transmission scheme based on collaborative communication of amplification forward single node
  • Broadband wireless sensor network transmission scheme based on collaborative communication of amplification forward single node
  • Broadband wireless sensor network transmission scheme based on collaborative communication of amplification forward single node

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Embodiment Construction

[0019] Referring to Fig. 1, the broadband wireless sensor network transmission scheme based on amplification and forwarding single-node cooperative communication of the present invention mainly includes the following steps:

[0020] Step 1: In a broadband wireless sensor network, the transmitter as the source node is equipped with a single antenna, which collects the surrounding environmental information, encodes it into a binary bit stream according to a certain source coding algorithm, and then performs channel coding To increase information redundancy, after interleaving, map to complex points on the constellation diagram.

[0021] The second step: carry out space-frequency coding according to the alamouti structure of the symbol, assuming that an OFDM symbol has 96 symbols, and every 96 symbols of the input is s=[x 1 ,...,x 48 , x 49 ,...,x 96 ], which is encoded into a data block of two slots, the first slot being s 1 = ...

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Abstract

The invention discloses a broadband wireless sensor network transmission scheme based on amplify-and-forward single-node cooperation communication. The scheme is as follows: a source node is firstly used to make an orthogonal space-frequency coding to an original signal, two time slots are respectively used to transmit orthogonal signal frames, then a pilot frequency is inserted and coded signals are subject to IFFT operation to fight against the multi-path attenuation, the coded signals are converted onto a time domain, and the serial data flow is broadcast and sent after the insertion of a cyclic prefix and a training sequence. A first time slot relay node receives signals of the source node, makes frequency deviation and phase compensation, then adopts an amplify-and-forward protocol to synchronously send the processed signals to an information sink node at a second time slot and the source node; an information sink receiver receives a mixed signal from two independent channels, firstly detects a frame head of the signal of the second time slot, then synchronizes with the frame head, then carries out FFT operation to the signal part, converts the signal back to the frequency domain, and performs space-frequency decoding to obtain an original sending symbol. The scheme is simple and easy to operate, can effectively improve the error code rate performance of the system, has strong practicability, and is convenient for the realization of the hardware.

Description

technical field [0001] The invention relates to the field of wireless information transmission, in particular to a broadband wireless sensor network transmission scheme based on amplification and forwarding single-node cooperative communication. Background technique [0002] Multiple-input multiple-output (MIMO) technology refers to the technology that uses multiple antennas at both the transmitting end and the receiving end, which can significantly improve the capacity of the communication system and the quality of the wireless transmission link, so it has become a research in the field of wireless communication. hotspot. However, due to the influence of factors such as the price and volume of terminal equipment, it is not suitable to configure multiple antennas on the nodes of the wireless sensor network. In order to solve this problem, the two concepts of cooperative communication and virtual multi-antenna came into being. [0003] Cooperative communication technology i...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L27/26H04B7/02G05B19/418
CPCY02P90/02
Inventor 丁盛严凯邱云周姜建朱明华刘海涛
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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