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Related information source multi-relay agent compression forwarding system and an optimization method

A technology of forwarding system and optimization method, applied in transmission system, digital transmission system, radio transmission system, etc., can solve the problem that communication network has not been further studied.

Inactive Publication Date: 2019-05-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0007] At present, the CEO problem only gives the rate-distortion area and code rate of the sensor network, but no further research has been done on the subsequent communication network, and the performance analysis of the entire sensor-communication system is still an open problem

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  • Related information source multi-relay agent compression forwarding system and an optimization method
  • Related information source multi-relay agent compression forwarding system and an optimization method
  • Related information source multi-relay agent compression forwarding system and an optimization method

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Embodiment Construction

[0048] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0049] Such as figure 1 As shown, the related information source multi-relay agent compression and forwarding system of the present invention is composed of two parts, the analog sensor network from the information source to a plurality of relay nodes and the digital communication from a plurality of relay nodes to the destination node In the network, there are no direct links between source and destination nodes. Due to environmental factors or cost constraints, the sensor can only perform simple analog signal transmission, but the encoder set at each relay node can perform complex distributed source encoding and send the encoded digital signal to the destination node Perform joint decoding.

[0050] The source sends a two-dimensional vector Gaussian source X(t)={x 1 (t),x 2 (t)} with a mean of zero and a variance of:

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Abstract

The invention discloses a related information source multi-relay agent compression forwarding system and an optimization method. The system comprises an analog sensor network from an information source to a plurality of relay nodes and a digital communication network from the plurality of relay nodes to a destination node, For the two related Gaussian sources, establishing a rate distortion function of distributed source coding based on a CEO problem; An optimal power distribution scheme is provided in combination with a channel capacity theorem; The influence of the correlation between the information sources on the system performance is researched by establishing an optimization equation set. Simulation results show that compression and forwarding are carried out by utilizing correlationof the signal sources, the signal-to-noise ratio performance of the system is superior to the situation that the two signal sources carry out coding and decoding independently, and theoretical guiding significance is achieved for improving the performance of wireless communication transmission.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-relay agent compression and forwarding system and optimization method for related information sources. Background technique [0002] Relay communication technology can expand communication coverage, increase the rate of edge users, effectively resist channel fading, and improve communication reliability, so it has received extensive attention. [0003] At present, commonly used relay forwarding protocols mainly include: amplify-and-forward, the relay node directly amplifies the analog signal sent by the source, and then forwards it to the destination node, but the noise power is also amplified at the same time; decoding and forwarding (decode-and-forward), the relay node decodes the received encoded digital signal, then re-encodes and forwards it to the destination node; coded cooperation (coded cooperation), after the original information is en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/155H04W4/38
CPCY02D30/70
Inventor 陈丹徐大专
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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