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A signal modulation method and device

A signal modulation and signal technology, applied in the field of communication, can solve the problems of excess bandwidth, reduced spectral efficiency, anti-noise and attenuation ability of adverse signals, etc., to achieve the effect of improving the ability to resist noise and attenuation, and improving spectral efficiency

Active Publication Date: 2018-02-02
苏州氶颂展览展示有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a signal modulation method and device to solve the problem that in the signal modulation method of the prior art, it is easy to introduce excess bandwidth, resulting in a decrease in spectral efficiency, and it is not conducive to improving the ability of the signal to resist noise and attenuation

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  • A signal modulation method and device
  • A signal modulation method and device
  • A signal modulation method and device

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Experimental program
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Embodiment 1

[0053] Figure 4 It shows the implementation process of the signal modulation method through the convolution operation model provided by the first embodiment of the present invention, and is described in detail as follows:

[0054] In step S401, the pulse waveform of the transmission signal is generated, the width of the pulse waveform is τ, wherein each pulse waveform is associated with n symbols (n>1), and the width of each symbol is Δτ,

[0055] The pulse waveform is as figure 2 shown.

[0056] In step S402, according to the convolution expression:

[0057] S i × h 0 +S i-1 × h 1 ...+S i-n+1 × h n-1 Obtain the associated signal generated between every n consecutive symbols in the symbol stream to be sent and the pulse waveform, wherein: the S i Represent the i-th symbol, and the h is a pulse waveform function, which can be expressed as h=[h 0 , h 1 ,...,h n-1 ], n represents the number of associated symbols, and each symbol is separated by Δτ.

[0058] The s...

Embodiment 2

[0063] Figure 7 It shows the implementation flow of the signal modulation method through the multiplication model provided by the second embodiment of the present invention, and is described in detail as follows:

[0064] In step S701, the pulse waveform of the transmission signal is generated, the width of the pulse waveform is τ, wherein each pulse waveform is associated with n symbols (n is an integer greater than 1), and the width of each symbol is Δτ,

[0065] In step S702, according to the multiplication expression: Obtaining an associated signal generated between every n consecutive symbols in the symbol stream to be sent and the pulse waveform, wherein: the S i Represent the i-th symbol, and the h is a pulse waveform function, which can be expressed as h=[h 0 , h 1 ,...,h n-1 ], each symbol is separated by Δτ.

[0066] Multiply the symbol stream S to be sent by the pulse waveform h. The model of the multiplication operation is as Figure 8 As shown, the proc...

Embodiment 3

[0070] Figure 9 A schematic structural diagram of the signal modulation device provided by the third embodiment of the present invention is shown, and the details are as follows:

[0071] The signal conditioning device described in the embodiment of the present invention includes:

[0072] The pulse waveform generation unit 901 is configured to generate the pulse waveform of the transmission signal, the width of the pulse waveform is τ, wherein each pulse waveform is associated with n symbols (n>1), and the width of each symbol is Δτ,

[0073] The computing unit 902 is configured to perform computation on each n consecutive symbols in the symbol stream to be sent and the pulse waveform according to a predetermined computing method, to generate a signal associated with the symbol and the pulse waveform;

[0074] The sending unit 903 is configured to send the associated signal through a transmission channel.

[0075] Preferably, the predetermined operation mode is convoluti...

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Abstract

The invention provides a signal modulation method which comprises the steps of: generating pulse wave forms for sending signals, wherein the width of the pulse wave forms is tau, each pulse wave formis correlated with n symbols (n is greater than 1) and the width of each symbol is delta tau (delta tau=tau / n); performing operation on every n symbols which are successive in a to-be-sent symbol stream and the pulse wave forms according to a preset operation mode to generate correlation signals of the symbols and the pulse wave forms; sending the correlation signals via a transmission channel. The method and the device can improve the spectrum efficiency of a system, generate mutual constraint through correlation between symbols, diffuse information symbols into many symbols and improve the noise resistance and the attenuation resistance of signals.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a signal modulation method and device. Background technique [0002] In a communication system, inter-symbol (or symbol) interference (Inter symbol Interference, ISI) is a key factor affecting system performance. In order to avoid inter-symbol interference, the Nyquist criterion that can avoid ISI is proposed in the field of communication, and a raised cosine filter that satisfies the Nyquist criterion is proposed. At present, the Nyquist criterion for transmission without ISI has become A guiding principle for the design of communication systems. [0003] Although the Nyquist criterion can effectively avoid ISI intersymbol interference and reduce the complexity of detection, in the Nyquist system, in order to meet the Nyquist criterion, it is inevitable to introduce excess bandwidth, resulting in spectral efficiency In addition, in the current commonly used communication ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03012H04L25/03159H04L25/03343H04L25/4902H04L25/0384H04L25/03834H04L25/03H04L25/03261
Inventor 不公告发明人
Owner 苏州氶颂展览展示有限公司
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