Multi-node cooperative signal transmission and reception method in wireless sensor network
A wireless sensor and signal transmission technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of not being able to provide full diversity gain, not taking into account time asynchrony and signal coordination, etc., to achieve full diversity gain and overcome the system Performance reduction, effect of reducing complexity
Active Publication Date: 2017-08-01
永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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However, this method does not take into account the time asynchrony and signal coordination between the cluster head nodes, and cannot provide full diversity gain
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[0055] specific implementation plan
[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0057] The present invention relates to system models such as figure 1 As shown, there is a system model of a source node, a sink node, and R cooperative transmission nodes, where the source node, R cooperative transmission nodes, and sink nodes are all configured with a single antenna; the cooperative transmission nodes share each other’s Antennas to form a virtual multi-antenna structure to achieve spatial diversity; in the channel estimation stage, by sending training sequences, the two-hop channel is estimated at the cooperative transmission node and the sink node respectively, and the first-hop channel estimated by the cooperative transmission node In the signal transmission stage, the amplify and forward (AF) relay strategy is used for communication. Design a decision feedback equalizer at...
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The invention discloses a multi-node collaborative signal transmitting and receiving method used in a wireless sensor network. The method comprises the channel estimation stage and the signal transmission stage. In the channel estimation stage, training sequences are sent, two jump channels are estimated at a collaborative transmission node and a sink node respectively, and the first jump channel estimated at the collaborative transmission node is transmitted to the sink node in a feedforward mode. In the signal transmission stage, a single carrier symbol block is sent at the transmitter end, random cyclic shift, cyclic prefix addition and amplification are conducted on the received symbol block at multiple relay ends, and the receives symbol block is forwarded to a target node; signals are received and interrupted at the receiving end, a frequency domain decision feedback equalizer is designed, and the frequency domain decision feedback equalizer is made to obtain correct judgment signals through a receiver. According to the multi-node collaborative signal transmitting and receiving method used in the wireless sensor network, signal coordination can be achieved, the calculated amount is greatly reduced, and more importantly, an asynchronous collaborative communication system in the wireless sensor network can obtain full score sets.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a multi-node cooperative signal transmitting and receiving method in a wireless sensor network. Background technique [0002] Wireless sensor network (Wireless Sensor Network, WSN) is a multi-hop self-organizing network formed by a large number of static or mobile miniature sensor nodes deployed in the monitoring area through wireless communication. In the wireless sensor network, through the cooperation among the sensor nodes, the information of the perceived objects in the geographical area covered by the network can be cooperatively sensed, collected, processed and transmitted, and finally sent to the owner of the network. [0003] The terminal equipment of the wireless sensor network is cheap and small in size, and the ability of each sensor node to independently process and transmit information is weak. Therefore, taking advantage of the fact that the wireles...
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IPC IPC(8): H04L1/00H04L25/02
Inventor 王慧明王雅
Owner 永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建