Method and system for acquiring BER (Bit Error Rate) approximate optimal decoding
An acquisition method and acquisition system technology, which is applied in the acquisition field of approximately optimal bit error rate decoding, can solve the problem of low ability to estimate the probability of different relay decoding scenarios, and achieve the effect of optimal performance
Inactive Publication Date: 2019-02-01
SHENZHEN UNIV
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[0006] The technical problem to be solved by the present invention is to provide a method and system for obtaining approximately optimal decoding of bit error rate based on the decoding and forwarding protocol, aiming at solving the problem of existing approximately optimal decoding algorithms in estimating the probability of different relay decoding scenarios low ability problem
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] The embodiment of the present invention provides such as figure 1 A method for obtaining an approximate optimal decoding of a bit error rate is shown, including:
[0027] S101, establish a relay network model based on the decoding and forwarding protocol, single source and single terminal, the relay network model includes a single source node, several relay nodes and a single target node, each relay node consists of a single input link and multiple output links, and the target node is the only node with multiple input links;
[0028] S102. Establish a product grid structure at the target n...
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The invention is applicable to a communication technology, and provides a method for acquiring BER (Bit Error Rate) approximate optimal decoding. The method comprises the steps of: establishing a relay network model based on a DF (Decode-and-Forward) protocol and a unisource single terminal, wherein the relay network model comprises a single source node, a plurality of relay nodes and a single target node, each relay node has a single input link and multiple output links, and the target node is a unique node with multiple input links; establishing a product grid structure at the target node, which represents all possible scenes in which decoding of the relay nodes is wrong, and carrying out accurate modeling on correlation between error bits introduced by decoding of the relay nodes; according to the product grid structure, determining branch metrics; and according to the product grid structure and a BCJR algorithm, carrying out calculation on source information transmitted by the source node to obtain the BER approximate optimal decoding. By the method for acquiring the BER approximate optimal decoding, which is provided by the embodiment of the invention, more excellent performance than that of an existing decoding algorithm can be achieved in different relay channel scenes.
Description
technical field [0001] The invention belongs to the field of communication, and in particular relates to a method and system for obtaining approximate optimal decoding of a bit error rate based on a decoding and forwarding protocol. Background technique [0002] As an outstanding transmission strategy, relay-assisted communication has become a research hotspot, and its basic idea is to deploy one or more relay nodes to extend the coverage of the signal sent by the source node. Among the many known relay protocols, the most widely studied are the Amplify-and-forward (AF) and Decode-and-Forward (DF) protocols. As one of the most classic and practical relay protocols to eliminate the effects of noise and other channel impairments, DF has important research significance. In this protocol, the relay node fully decodes, re-encodes, and retransmits the source node's information. However, the implementation of the traditional DF protocol faces two problems. [0003] First, the tr...
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IPC IPC(8): H04L1/00
CPCH04L1/0036H04L1/006H04L1/0076
Inventor 黄冠龙陆凌钱彬
Owner SHENZHEN UNIV