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A method for reducing outage probability of opportunistic distributed space-time coding cooperative communication network

A technology of cooperative communication and space-time coding, applied in the fields of error prevention/detection through diversity reception, digital transmission system, forward error control use, etc., can solve problems such as system performance limitation, system interruption performance impact, etc. conditions, the effect of reducing the probability of interruption, and enhancing stability

Inactive Publication Date: 2018-05-18
SHANDONG UNIV
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Problems solved by technology

However, the system performance of ODSTC in cooperative communication is limited by the channel conditions between users, that is, when the conditions between user channels are poor, the system's interruption performance will also be affected

Method used

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  • A method for reducing outage probability of opportunistic distributed space-time coding cooperative communication network
  • A method for reducing outage probability of opportunistic distributed space-time coding cooperative communication network
  • A method for reducing outage probability of opportunistic distributed space-time coding cooperative communication network

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0028] The opportunistic distributed space-time coding cooperative communication network adopted in this embodiment is a single-cell decoding and forwarding DF cooperative communication network, which includes N candidate users u k ,k∈{1,2,...,N} available for user u 0 Select, so the system has a total of N+1 users. There is a base station BS in the network, and the transmission process is a decoding and forwarding protocol.

[0029] Each user node in the communication network is configured with a single antenna and uses full-duplex communication, from user u k to user u 0 and from user u 0 to user u k The instantaneous channel state information of the link represents |h k,0 | 2 and h 0,k | 2 , and obey the channel mean respectively and The channels among users are independent but not necessarily identically distributed.

[0030] In order not to...

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Abstract

The invention discloses a method for lowering the interruption probability of an opportunity-distributed space-time coded cooperative communication network. The method comprises the following steps: in the opportunity-distributed space-time coded cooperative communication network, selecting any user node as a determined user node and the other user nodes as alternative user nodes of the determined user node; enabling the determined user node and the other alternative user nodes to transmit information to each other, and respectively calculating the received signal to noise ratio from the determined user node to the other alternative user nodes and the received signal to noise ratio from the alternative user nodes to the determined user node; selecting an optimal companion of the determined user node according to the received signal to noise ratio and an optimal worst user selection method BWPS; enabling the determined user node and the optimal companion thereof to carry out data transmission with a base station (BS) through opportunity-distributed space-time coded cooperation respectively; and finally reaching the target of lowering the interruption probability of an opportunity-distributed space-time coded cooperative communication network.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for reducing the probability of interruption of an opportunistic distributed space-time coding cooperative communication network. Background technique [0002] Cooperative communication can enable mobile stations with a single antenna to obtain certain gains similar to those in MIMO systems. The basic idea is that in a multi-user environment, mobile stations with a single antenna can share them in a certain way The antennas of each other thus create a virtual MIMO system, thereby obtaining transmit diversity gain. [0003] In recent years, due to the great advantages of cooperative communication technology in improving the capacity and system reliability of wireless communication networks and anti-fading, it has attracted extensive attention. At the same time, this technology obtains space diversity by sharing resources such as spectrum among multiple singl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06
CPCH04L1/0077H04L1/0618
Inventor 曹叶文冯琳琳
Owner SHANDONG UNIV
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