Cooperation transmission method based on joint network channel code

A technology of channel coding and joint network, which is applied in the field of joint network-channel coding cooperative transmission, can solve the problem that the cooperative transmission method cannot effectively take into account the system diversity gain and network throughput, etc., so as to improve bandwidth utilization, increase transmission rate, Fighting the effects of fading

Inactive Publication Date: 2007-12-19
BEIHANG UNIV
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a cooperative transmission method based on joint network-channel coding, which can effectively combat the fading of time-varying channels, in view of the problem that the existi

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  • Cooperation transmission method based on joint network channel code
  • Cooperation transmission method based on joint network channel code
  • Cooperation transmission method based on joint network channel code

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Embodiment Construction

[0022] The invention can effectively resist the fading of time-varying channels and improve the transmission rate of information by jointly designing a cooperative transmission method of network-channel coding.

[0023] As shown in FIG. 1 , it is a system transmission model of the cooperative transmission method based on joint network-channel coding of the present invention, including a source node S, a relay node R and a destination node D. The source node S and the relay node R send data to the destination node D, and the relay node R not only assists the source node S to complete a sending task, but also needs to send its own information.

[0024] The present invention adopts time-division multiplexing, only needs to synchronize at the frame level, and is more in line with the wireless transmission environment. Assuming that a signal transmission takes a unit time, the transmission process can be divided into two time periods t and 1-t. X, V, W, and Y are the information s...

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Abstract

This invention relates to a coordinate transmission based on joint network- channel coding utilizing the maximum system transmission rate to structure an odd-even check matrix, which includes coding odd-even check matrixes of a source channel, a relay channel and a network channel, and the source node codes the source information with the source channel odd-even check matrix and broadcasts it to the relay and the destination nodes, the relay node uses the relay channel matrix to code its own information and send it to the destination node and uses the network code matrix to code the source coded and relay coded information to get network coded information to pick up extra information and carry out low density odd-even check coding it to be sent to the destination node, which decodes the information sent by the source node and the relay node jointly.

Description

technical field [0001] The invention relates to wireless transmission technology, in particular to a cooperative transmission method of joint network-channel coding realized based on low density parity check code. Background technique [0002] In wireless networks such as cellular networks, sensor networks, and wireless ad hoc networks, signal transmission will experience multipath fading, Doppler frequency shift, and other interferences, and it is very difficult to restore the signal at the receiving end. [0003] Existing wireless networks use Multi-Input Multi-Output (MIMO) technology combined with Orthogonal Frequency Division Multiplexing (OFDM) technology to greatly increase system capacity and information transfer rate. Due to the high complexity of the MIMO system, the system is more complex when combined with other technologies, so this technology is not suitable for high-speed mobile nodes in space. At the same time, because the size and power of the space mobile...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04B7/26H04B7/04
Inventor 张军王钢杜冰陈实
Owner BEIHANG UNIV
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