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A block super-Nyquist transmission method and system

A transmission method and block technology, applied in the field of communications, can solve the problem of high system implementation complexity, and achieve the effects of reducing system complexity, simplifying decision methods, and improving bandwidth utilization.

Active Publication Date: 2020-06-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, generally speaking, if the ISI compensation of the signal is to be performed at the receiving end, it is often necessary to perform as many samples as the amount of data transmitted, and the system implementation complexity is relatively high.

Method used

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  • A block super-Nyquist transmission method and system
  • A block super-Nyquist transmission method and system
  • A block super-Nyquist transmission method and system

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Experimental program
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Embodiment

[0055] figure 2 It is a specific implementation flow chart of the block super Nyquist transmission method of the present invention. Such as figure 2 As shown, the specific steps of the block super Nyquist transmission method of the present invention include:

[0056] S201: Block mapping:

[0057] At the sending end, first group the signals to be transmitted, every n+m symbols t k′ Constitute a block signal, where 1≤k′≤n+m, n and m are positive integers, and the n+m symbols t in the block signal k′ Map it into n signals s through a linear operation of a mapping matrix M k The signal block of , where 1≤k≤n, the expression of the linear map is as follows:

[0058]

[0059] Among them, M n×(n+m) is a matrix with n rows and n+m columns, and its specific expression is as follows:

[0060]

[0061] Among them, I n is an identity matrix of order n, α i is a constant greater than zero, where 1≤i≤m.

[0062] The mapping matrix will n+m t k′ Symbolic mapping to n s k ...

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Abstract

The invention discloses a block super-Nyquist transmission method and system. Signals to be transmitted are grouped at the transmitting end, every n+m symbols form a block signal, and are mapped into a signal of n signals through a mapping matrix The block is sent; at the receiving end, the sampled signal is divided into blocks, each block contains n sample values, the block signal formed by the block signal is compared with the possible value vector, and the maximum likelihood judgment criterion is used to determine the transmitted symbol. The estimated sequence is restored to the serial signal output. The present invention realizes super-Nyquist transmission through block transmission, while maintaining good bit error performance.

Description

technical field [0001] The invention belongs to the technical field of communication, and more specifically, relates to a block super-Nyquist transmission method and system. Background technique [0002] The shortage of frequency band resources is one of the huge problems faced by the communication industry at present, which seriously limits the transmission rate and communication quality of the communication system. In order to solve the problem of shortage of frequency band resources, many new communication technologies have been proposed, among which Faster-Than-Nyquist (FTN) technology is a communication transmission technology that efficiently utilizes spectrum resources. Under the same bandwidth conditions, the super-Nyquist technology can obtain a high transmission rate that breaks through the traditional Nyquist limit without causing the loss of system bit error performance. [0003] figure 1 It is a system block diagram of a traditional digital communication syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L1/00
CPCH04L1/0006H04L25/03006
Inventor 侯浩东许渤邱昆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA