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

A technology of forwarding system and optimization method, applied in transmission systems, digital transmission systems, adjustment of source coding, etc., can solve the problems of lack of communication network transmission performance research and design, and achieve high signal-to-noise ratio performance and good transmission performance. Effect

Active Publication Date: 2017-07-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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.

Method used

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

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Embodiment

[0088] Such as figure 2 As shown, when the number of relays L is 15 and the receiving SNR ratio of each relay is 1:L, the relationship diagram between the optimized system receiving end SNR and the total SNR constraints; image 3 When the total SNR is constrained to be 10dB and the receiving SNR ratio of each relay is 1:L, the optimized relationship between the SNR at the receiving end of the system and the number of relays is shown in Table 1. The number of relays arrived.

[0089]

[0090]

[0091] Table 1 image 3 The corresponding number of relays actually used

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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 ...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/0014
Inventor 张瑞丹徐大专许生凯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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