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Asymmetric baseband coding method and transmitting-receiving device

A coding method and an asymmetric technology, applied in the field of asymmetric baseband signal coding, can solve problems such as non-coding methods, and achieve the effect of high frequency band utilization and simple structure

Inactive Publication Date: 2013-12-04
SOUTHEAST UNIV
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Problems solved by technology

For the increasingly crowded wireless spectrum resources, this is not the most efficient coding method

Method used

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  • Asymmetric baseband coding method and transmitting-receiving device
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  • Asymmetric baseband coding method and transmitting-receiving device

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] 1. Asymmetric baseband coding method

[0031] An asymmetric baseband encoding method provided by the present invention adopts two different rectangular pulses g 0 (t), g 1 (t) represent binary digits 0 and 1 respectively, and the rectangular pulse g 0 (t) contains c narrow pulses with pulse width τ, and the rectangular pulse g 0 (t), g 1 The function expression of (t) is:

[0032] g 0 ( t ) = Π ( t ) 0 ≤ t dτ - Π ( ...

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Abstract

The invention discloses an asymmetric baseband coding method. A rectangular pulse g0 (t) and a rectangular pulse g1 (t) indicate a binary digit 0 and a binary digit 1 respectively; the rectangular pulse g0 (t) comprises c narrow pulses with pulse widths tau; c tau can be infinitely small, so that coding waveforms are infinitely close to periodical waves; asymmetric degree can be controlled by selecting different modulation parameters, so that different spectrum masks are realized, and different channel or spectrum occupancy requirements are met. The invention further provides an asymmetric baseband transmitting-receiving device. A transmitting device comprises a coding module, a clock generator, a carrier modulation module, a filter module and a digital-to-analog converter, and a receiving device comprises an analog-to-digital converter, a filter module, a phase-locked loop, a clock module and a matching detection module. Equivalent or high-speed data transmission can be realized by the aid of less sideband energy, so that the use ratio of a frequency band is increased.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to an asymmetric baseband signal coding method, which can realize special frequency spectrum distribution and information bearing mode. Background technique [0002] With the development of the information society, people's demand for wireless multimedia communication continues to increase, especially the development of high-definition video and ubiquitous mobile Internet services, making people's demand for spectrum "consumption" higher and higher; and spectrum resources are limited, so , how to maximize the use / reuse of limited spectrum resources to meet the growing demand for wireless communication is one of the important research topics in the field of communication. Different spectrum distributions can be achieved through different baseband codes, which can effectively use limited spectrum resources to improve spectrum efficiency. [0003] The traditional non-return-to-zer...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L7/033H04L25/03H04L25/49
Inventor 张士凯
Owner SOUTHEAST UNIV
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