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Multi-source multi-relay distributed agent forwarding system and optimization method under power constraints

A technology of power constraint and forwarding system, applied in the direction of transmission system, radio transmission system, electrical components, etc., can solve the problem of transmission performance research and design without sensor communication network, achieve low power consumption, good transmission performance, strong resistance Effects that interfere with performance

Active Publication Date: 2021-08-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0029] The CEO problem of distributed source coding only studies the rate-distortion area and code rate corresponding to the distributed compression coding of the relay node in the wireless analog sensor network, and does not study the transmission performance of the entire sensor communication network and design

Method used

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  • Multi-source multi-relay distributed agent forwarding system and optimization method under power constraints
  • Multi-source multi-relay distributed agent forwarding system and optimization method under power constraints
  • Multi-source multi-relay distributed agent forwarding system and optimization method under power constraints

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Embodiment Construction

[0087] The present invention is described in further detail now in conjunction with accompanying drawing.

[0088] like figure 1 The multi-relay distributed proxy forwarding system shown, its system structure includes M source nodes S, (M+1)L fading channels, L relay nodes R i (i=1, 2...L) and a destination node D. source node S m There is no direct transmission link with the destination D, and the signal passes through multiple relay nodes R i Sampling, encoding, compression and then forwarding, so as to realize the communication between the source node and the destination node.

[0089] Relay node R i A source coder is set at , and the source coder converts the received analog signal Y which has been channel-attenuated and mixed with Gaussian white noise ri (t) Sampling, coding and compression, converted into digital signal Y' ri (t), each relay node R i Then with the same transmit power P r The digital signal Y' ri (t) Send to the destination node D to realize the ...

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Abstract

Multi-source multi-relay distributed agent forwarding system and optimization method under power constraints. In this system, multiple source nodes transmit analog signals with multi-dimensional Gaussian distribution, and destination nodes receive digital signals. Multiple relay Nodes are responsible for performing distributed source coding on received analog signals, converting them into digital signals and forwarding them. Using the CEO theory of distributed source coding, the information transmission rate after the source signal reaches each relay node through the noise channel is deduced. Combining the information rate with the channel capacity of the relay to the destination node, the wireless analog sensor network is connected with the wireless digital communication network. Under the condition that the total power is limited, the corresponding algorithm is optimized to make the system SNR performance optimal. Both theoretical analysis and simulation results show that the optimization method proposed in the present invention can make the multi-source multi-relay distributed proxy forwarding system provide better signal-to-noise ratio performance than the amplification and forwarding system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-source multi-relay distributed agent forwarding system and an optimization method under power constraints. Background technique [0002] Wireless relay technology is a very important technology in wireless communication, and has been widely used in various wireless communication systems, such as satellite relay communication, microwave relay communication, and mobile communication systems. It can effectively resist the impact of channel fading, expand the coverage of wireless signals, increase the capacity of communication systems, increase the diversity gain of the receiving end, and improve the reliability of information transmission, thereby improving communication quality. [0003] At present, research on relay technology mainly focuses on digital relay networks, such as amplification and forwarding, decoding and forwarding, and compression ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/155
CPCH04B7/15507H04B7/15557
Inventor 鲍军委徐大专
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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