A Network Coding Method Combined with Orthogonal Processing
A technology of network coding and aggregation, applied in the field of network coding combined with orthogonal processing, can solve problems such as inability to decode user information, achieve the effects of improving overall performance, satisfying real-time decoding, and reducing the probability of system interruption
Inactive Publication Date: 2016-07-06
SHENZHEN TINNO WIRELESS TECH
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[0005] However, in the system using finite field network coding, the receiving end cannot directly decode the user information through the received encoded information packets, but needs enough data packets to decode the user information, which brings new challenges to the real-time decoding and system interruption probability. requirements
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[0022] The invention takes a multi-user multi-hop layered network suitable for high-speed data service transmission as a system model, and proposes a network coding method combined with orthogonal processing in order to meet the real-time decoding performance and reliability of signal transmission at the receiving end. Here we take a two-hop multi-user collaborative network as an example to illustrate. The system model is as follows: figure 1 shown. The transmission process of the information packet consists of two hops: source end-relay node, relay node-receiver end.
[0023] The main idea of the present invention is as figure 2 shown. Before the source user data is modulated and transmitted, the data information generated by each source user is first subjected to orthogonal processing. The so-called orthogonal processing is to obtain an orthogonal set E=(cos2πf 1 t,cos2πf 2 t,...,cos2πf M t,...) to multiply the selected elements with the source user data, so that the...
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The invention discloses a network encoding method combining orthogonal processing, belonging to the technical field of multi-user and multi-relay cooperative communication. The method comprises the following steps that: step 1. a source terminal user performs low frequency orthogonal processing on transmitted data to meet pairwise orthogonal demand of processed user information; step 2. the orthogonally processed user information is modulated and then broadcast to a relay node; step 3. the relay node performs network encoding on the received user information and sends the user information to a receiving terminal; and step 4. the receiving terminal decodes the user information according to the received encoded information. The network encoding method combining orthogonal processing disclosed by the invention well utilizes the pairwise orthogonal characteristic of the processed user information to enable the receiving terminal to directly decode the user information after receiving an encoded information packet, thereby really reflecting the advantages of network encoding, meeting the decoding instantaneity of the receiving terminal, reducing the interruption probability of the system and effectively improving the integral performance of the system.
Description
technical field [0001] The invention belongs to the technical field of multi-user multi-relay cooperative communication, and relates to a network coding method combined with orthogonal processing. Background technique [0002] The main principle of network coding is to use the ability of relay nodes to process information, to combine multiple received information linearly or non-linearly, and then forward them to the next hop node, so as to improve the network throughput of the system. Network coding was first proposed in wired network. With the development of wireless communication technology, it is gradually applied in wireless network. The broadcast feature of wireless network further promotes the development of network coding technology. [0003] At present, the network coding techniques used in wireless communication are mostly XOR network coding, physical layer network coding, finite field network coding and complex field network coding, etc. The most studied system i...
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IPC IPC(8): H04L1/00
Inventor彭醇陵张祖凡杨静李余景小荣
OwnerSHENZHEN TINNO WIRELESS TECH