Distributed compressed forwarding system of Gaussian source and optimization method of system

Abstract

The invention discloses a distributed compressed forwarding system of a Gaussian source and an optimization method of the system. In the system, the source sends analog Gaussian signals, distributed compressed coding is carried out in relays, and digital transmission is carried out. A theoretical analysis frame of the system is provided by considering that reception signal to noise ratios of different relays satisfy certain proportional relation and a reception end has different receiving signal to noise ratios for different relay signals in an additive white Gaussian noise channel. For a multi-relay distributed source coding problem, a CEO theory is used to establish a rate distortion function of a multi-relay network, transmission rates of the multiple relays are obtained, a Shannon channel capacity theory is combined, the compressed transmission rates of the relay are linked to the capacity of the channel from the relays to the channel, an optimized design equation of the system is provided, and an optimal solving algorithm is provided. Under the condition that the total power is limited, power distribution is carried out between the source and the relay network based on the signal to noise ratios, and the signal to noise ratio performance of the reception end of the system is maximized.

Description

technical field [0001] The invention discloses a design method for a distributed compression and forwarding system of a multi-relay network under a Gaussian source, and belongs to the technical field of wireless communication. Background technique [0002] Wireless relay technology can effectively combat channel fading, expand wireless network coverage, increase system capacity, increase diversity gain, improve information reliability, and improve communication quality, and is widely used in various wireless communication systems. For example, satellite communication and microwave relay communication system are classic wireless relay communication systems. In mobile communication, the use of relay stations to expand signal coverage and improve system capacity has become a key technology in mobile communication systems. In addition, the popularity and wide application of wireless sensor networks in military reconnaissance, environmental monitoring, smart home, detection and ...

AI Technical Summary

Problems solved by technology

[0019] Regarding the CEO problem of distributed source coding in sensor networks, only the rate-distortion area and code rate after distributed compression coding is studied in the relay, and the transmission performance of the entire communication network is not studied and designed.

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