WO2004098139A1 - Procede d'emission multi-modulation - Google Patents

Procede d'emission multi-modulation Download PDF

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Publication number
WO2004098139A1
WO2004098139A1 PCT/CN2003/000321 CN0300321W WO2004098139A1 WO 2004098139 A1 WO2004098139 A1 WO 2004098139A1 CN 0300321 W CN0300321 W CN 0300321W WO 2004098139 A1 WO2004098139 A1 WO 2004098139A1
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WO
WIPO (PCT)
Prior art keywords
amplitude
period
wave
phase
wavelet
Prior art date
Application number
PCT/CN2003/000321
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English (en)
Chinese (zh)
Inventor
Dequn Liang
Original Assignee
Dequn Liang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dequn Liang filed Critical Dequn Liang
Priority to PCT/CN2003/000321 priority Critical patent/WO2004098139A1/fr
Priority to KR1020057020676A priority patent/KR100974533B1/ko
Priority to CN038262894A priority patent/CN1765092B/zh
Priority to JP2004571218A priority patent/JP2006524923A/ja
Priority to AU2003231522A priority patent/AU2003231522A1/en
Priority to CA002527633A priority patent/CA2527633A1/fr
Publication of WO2004098139A1 publication Critical patent/WO2004098139A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/24—Half-wave signalling systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K12/00—Producing pulses by distorting or combining sinusoidal waveforms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure

Definitions

  • the present invention belongs to the field of digital communication technology; specifically, it is a multiple modulation transmission method. Background technique
  • the modulated signal is called a line code.
  • the signal that is modulated in carrier transmission is a sinusoidal waveform. Increasing the type of waveform can increase the number of bits (ie, the amount of information) carried by the modulation signal, and the transmission rate increases.
  • the variation of a sine-like waveform depends on three parameters: amplitude, frequency, and phase. Obviously, the more parameters that can be controlled simultaneously, the more kinds of waveforms are generated.
  • Multi-carrier is a combination of multiple orthogonal sine waves of different frequencies and amplitudes into one wave.
  • Multi-ary amplitude and phase modulation (such as multi-ary quadrature modulation-MQAM) is a multi-amplitude difference that sets the two groups apart by 90 °.
  • the value sine wave forms a wave.
  • orthogonality is a principle that must be observed in traditional modulation technology, otherwise demodulation cannot be performed. However, it is this requirement of orthogonality that limits the full use of the three parameters of the sine wave, and thus limits the further improvement of the transmission rate.
  • An object of the present invention is to provide a multi-modulation transmission method, which can greatly improve the frequency band utilization rate and the signal-to-noise ratio, thereby further improving the transmission rate.
  • a multiple modulation transmission method characterized in that: a plurality of independent sine waves are combined into a composite wave, and the composite wave is a non-orthogonal multiple modulation symbol; wherein: each of the independent sine waves is called a sub-wave Wave, the amplitude, frequency, and phase of the independent sine wave can be arbitrarily selected within its value range, and each of the independent sine waves is non-orthogonal; Multi-sampling the synthetic wave; and decomposing each wavelet in the non-orthogonal multiple modulation symbol to realize data communication.
  • the synthetic wave includes: a periodic synthetic wave is composed of some single-cycle sine waves with the same cycle, and each sine wave moves one phase in succession, the period of which is smaller than the period of the synthetic wave, and its amplitude is from a specified quantization set Take a value to achieve multiple amplitude and phase modulation baseband transmission.
  • the non-orthogonal multiple modulation code must meet the following conditions:
  • the waveform of one symbol period is a multiple amplitude phase modulation baseband code, which is called an amplitude phase baseband code;
  • an amplitude phase baseband code waveform is a composite wave formed by superposing some wavelets, and its period is called an amplitude phase baseband code code Metacycle
  • the required bandwidth of the multiple-amplitude-phase modulation baseband code is 0 ⁇ W, W> l / T; recommended ⁇ 2 / T; the decoding method of the multiple-amplitude-phase-modulation baseband code is:
  • the amplitude corresponding to each wavelet is an element of a coefficient matrix, and the value range is a real number field; by solving this system of equations, the solution of each wavelet can be obtained, thereby realizing multiple amplitude phase modulation baseband transmission.
  • the carrier signal is first filtered by a bandpass filter, and then decoded to achieve the Carrier transmission of multiple amplitude phase modulated baseband codes.
  • the carrier signal cos ⁇ t is first filtered by a band-pass filter, and then decoded.
  • 3 ⁇ 4 is an element of a coefficient matrix, and the value range is a real number field; by solving this system of equations, the solutions of each wavelet can be obtained, and the carrier transmission of multiple amplitude phase modulation baseband codes is realized.
  • the synthetic wave includes: a periodic synthetic wave is composed of some sine waves with the same validity period, and the length of the validity period is an integer multiple of a half period of the sine wave and is less than the period of the synthetic wave, Each sine wave moves one phase in succession, and its amplitude takes a value from the specified quantization set; multiple amplitude and phase modulation direct carrier transmission is realized.
  • the multi-amplitude phase modulation direct carrier transmission needs to meet the following conditions:
  • H l, 2, ..., H
  • Multi-amplitude phase modulation direct carrier transmission requires a bandwidth exceeding (1 / ⁇ .-1 / ⁇ ⁇ 1 / ⁇ . + 1 / ⁇ ); when decoding, first take out a symbol in the current period F, and then perform the following operations on it :
  • the synthetic wave includes: a periodic synthetic wave is composed of some sine waves with different validity periods, the length of the valid period is an integer multiple of a half period of the sine wave, the longest valid period is equal to the period of the composite wave, and the other valid periods are successive Reduce one value, and its amplitude takes one value from the specified quantization set. Multiple carrier frequency modulation direct carrier transmission is realized.
  • the multiple-amplitude-frequency modulation direct carrier transmission needs to meet the following conditions:
  • Multi-amplitude frequency modulation direct carrier transmission requires a bandwidth exceeding ( ⁇ IT lQ- ⁇ IT x ⁇ ⁇ IT m + ⁇ IT N ); when decoding, first take out a symbol in the current period f, and then perform the following operations:
  • the synthetic wave includes:
  • a periodic synthetic wave can be composed of some sine waves with the same validity period.
  • the length of the validity period is an integer multiple of a half period of the sine wave and is less than the period of the synthetic wave.
  • Each sine wave moves one phase in succession, and its amplitude is from the specified quantization set. Take one of the values to achieve multiple amplitude and phase modulation direct carrier transmission;
  • a periodic synthetic wave can also be composed of sine waves with different validity periods.
  • the length of the valid period is an integer multiple of a half period of the sine wave.
  • the longest valid period is equal to the period of the synthetic wave.
  • the other valid periods are successively reduced by one value. Take a value from the specified quantization set to achieve multiple amplitude-frequency modulation direct carrier transmission;
  • the multiple-amplitude-frequency-phase modulation direct carrier transmission must meet the following conditions:
  • the symbol period is, ⁇ / ⁇ / is it?
  • Multi-amplitude frequency phase modulation direct carrier transmission requires bandwidth exceeding:
  • the method for decoding a direct carrier with multiple amplitude-frequency phase modulation is to first take a symbol in the current period f, and then do the following: Operation:
  • the beneficial effect of the present invention is that by providing a multiple modulation transmission method, the frequency band utilization rate and the signal-to-noise ratio can be greatly improved, and the transmission rate can be greatly improved.
  • the positive effects of the multiple-amplitude-phase-modulated baseband transmission are: a much higher frequency utilization ratio than the traditional baseband transmission method;
  • the positive effect of the carrier transmission of the multiple-amplitude-phase-modulated baseband code is: inheriting the advantages of high-frequency band utilization of the multiple-amplitude-phase-modulated baseband code of the baseband transmission;
  • Phase modulation baseband transmission likewise, has a high frequency band utilization rate. On the other hand, it can be directly used for carrier transmission without the need for carrier transmission based on multiple amplitude phase modulation baseband codes.
  • the positive effect of the multiple-amplitude-frequency modulation direct carrier transmission is: compared with the discrete multi-tone (DMT) method which has been the international standard of ADSL at present, the required bandwidth is reduced; this is because between adjacent wavelets The frequency difference is smaller than the frequency difference between adjacent DMT wavelets;
  • DMT discrete multi-tone
  • the positive effect of the multiple-amplitude-frequency-phase modulation direct carrier transmission is that the parameters of the sine wave are used, and the frequency band utilization rate is higher.
  • the waveform of one symbol period is called a multiple amplitude phase modulation baseband code, and the tube is called an amplitude phase baseband code.
  • An amplitude-phase baseband code waveform is a composite wave formed by the superposition of some wavelets.
  • the period is called the amplitude-phase baseband code symbol period ⁇ , 7), which is an internal duration, which is the validity period of the wavelet, and is called a sub-wave.
  • 3 ⁇ 4 is an element of the coefficient matrix, and the value range is the real number domain. You can get the solution of each wavelet by solving this system of equations.
  • the required bandwidth of a multi-amplitude phase modulation baseband code is 0 ⁇ W, W> l / T, and ⁇ 2 / ⁇ is recommended.
  • This transmission method has a much higher frequency utilization rate than the traditional baseband transmission method.
  • g c (0; Recommended ⁇ > 2 . It is actually a method of multi-amplitude phase modulating the baseband code carrier into a certain ⁇ 0 ⁇ passband higher than the baseband.
  • the carrier signal cos ⁇ t is first filtered by a band-pass filter.
  • the decoding method of the amplitude-phase modulation baseband code can complete the final decoding. This method inherits the advantages of high frequency band utilization of the multiple-amplitude-phase-modulated baseband code for baseband transmission.
  • L means to take off the whole number (remove the decimal part and only the integer part), Integer field).
  • the multi-amplitude phase modulation direct carrier transmission becomes a multi-amplitude phase modulation baseband transmission.
  • Multi-amplitude phase modulation direct carrier transmission requires a bandwidth exceeding (1 / ⁇ .-1 / ⁇ ⁇ 1 / ⁇ . + 1 / ⁇ );
  • the method for decoding multiple amplitude and phase modulated direct carriers is to first take a symbol in the current period, and then perform the following operations on it:
  • Multi-amplitude-frequency modulation direct carrier transmission Its characteristics are described by the following symbol symbol period T + ⁇ ,
  • ⁇ 'L +0.5 means to take off the integer (remove the decimal part, only the integer part is left)
  • this is a non-orthogonal multi-carrier.
  • Multi-amplitude frequency modulation direct carrier transmission requires a bandwidth exceeding (i / 7o -1 / T, - ⁇ / ⁇ ⁇ 0 + ⁇ ⁇ ).
  • the method for decoding a direct carrier with multiple amplitude-frequency modulation is to first take a symbol in the current period f, and then perform the following operation on it:
  • the symbol period is, 2 ⁇ Arthur. Is a duration within, is the validity period of the wavelet, and is called
  • T hj T (h + 1) j ⁇ T, T h + V) j is delayed from T hj
  • T hj> T h ⁇ j + X), - g Z, T hl ⁇ 2T h (j + l), T hJ nT hJ0 / 2, neZ; multiple amplitude frequency phase-modulated direct-carrier transmission bandwidth required exceeds (1 / ⁇ 110 -1 / T n ⁇ l / ⁇ means + 1 / 1 ⁇ 2);
  • the multiple-amplitude-frequency-phase modulation direct carrier transmission is a combination of the two methods of multiple-amplitude-phase-modulation direct carrier transmission and the multiple-amplitude-frequency modulation direct carrier transmission, and it can control three parameters of a sine wave at the same time, that is, this method With sufficient parameters of the sine wave, it has higher frequency band utilization.
  • the following are four embodiments.
  • the computer transmission simulation on a telephone line consisting of a copper twisted pair cable was performed using four of the above methods.
  • the channel model is
  • the noise is near-end crosstalk (NEXT) for 10 symmetric user loops (HDSL) and far-end crosstalk (FEXT) for 10 asymmetric user loops (ADSL). Only the occupied channel frequency bands are different.
  • Multi-amplitude phase modulation baseband transmission method is used to achieve 1.28Mbps unidirectional transmission in the frequency band of 0 ⁇ 80KHz.
  • Multi-amplitude phase modulation direct carrier transmission achieves a bidirectional transmission of 12.8Mbps in the frequency bands of 240KHz-1.04MHz and 1.1MHz ⁇ 1.9MHz.
  • Multi-amplitude frequency modulation direct carrier transmission achieves 6.4Mbps bidirectional transmission in the frequency bands of 10OKHz ⁇ 615MHz and 700KHz ⁇ 1.845MHz.
  • Signal: 7 f ⁇ t) ⁇ g cf (tj);
  • N 8, 8 bits per wavelet.
  • N 8, 8 bits per wavelet.
  • Multi-amplitude frequency phase modulation direct carrier transmission achieves 9.6Mbps two-way transmission in the frequency bands of 100K ⁇ to 615 ⁇ and 700K ⁇ Z5MHz.
  • the beneficial effect of the present invention is that by providing a multiple modulation transmission method, the frequency band utilization rate and the signal-to-noise ratio can be greatly improved, and the transmission rate can be greatly improved.
  • the positive effect of the multiple-amplitude-phase modulation baseband transmission is: a much higher frequency band utilization rate than the traditional baseband transmission method;
  • the positive effect of the carrier transmission of the multiple-amplitude-phase-modulated baseband code is: inheriting the advantages of high-frequency band utilization of the multiple-amplitude-phase-modulated baseband code of the baseband transmission;
  • the positive effect of the multiple-amplitude-phase modulation direct carrier transmission is: on the one hand, it has the same high frequency band utilization as the "multiple-amplitude-phase modulation baseband transmission", on the other hand, it can be directly used for carrier transmission without having to be based on Carrier transmission of multiple amplitude and phase modulation baseband codes;
  • the positive effect of the multiple-amplitude-frequency modulation direct carrier transmission is: compared with the discrete multi-tone (DMT) method which has been the international standard of ADSL at present, the required bandwidth is reduced; this is because between adjacent wavelets The frequency difference is smaller than the frequency difference between adjacent DMT wavelets;
  • DMT discrete multi-tone
  • the positive effects of the multiple-amplitude-frequency-phase modulation direct carrier transmission are: the parameters of the sine wave are used, and the frequency band utilization is higher.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Cette invention concerne un procédé d'émission multi-modulation qui combine une pluralité d'ondes sinusoïdales en une onde composite formant un système multi-modulation non orthogonal. Chacune des dites ondes sinusoïdales indépendantes est considérée comme une sous-onde dont l'amplitude, la fréquence et la phase peuvent avoir n'importe quelle valeur dans la plage de valeurs considérée, et qui sont non orthogonales les unes par rapport aux autres. L'onde composite fait l'objet d'un échantillonnage du système multi-modulation non orthogonal. Chaque sous-onde est décomposée en vue de la communication de données. Ce procédé permet d'améliorer l'utilisation des fréquences et du rapport signal-bruit, ce qui se traduit à son tour par une augmentation importante du débit d'émission.
PCT/CN2003/000321 2003-04-30 2003-04-30 Procede d'emission multi-modulation WO2004098139A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PCT/CN2003/000321 WO2004098139A1 (fr) 2003-04-30 2003-04-30 Procede d'emission multi-modulation
KR1020057020676A KR100974533B1 (ko) 2003-04-30 2003-04-30 다중 변조 전송 방법
CN038262894A CN1765092B (zh) 2003-04-30 2003-04-30 一种多重调制传输方法
JP2004571218A JP2006524923A (ja) 2003-04-30 2003-04-30 多重変調伝送方法
AU2003231522A AU2003231522A1 (en) 2003-04-30 2003-04-30 A multi-modulation transmitting method
CA002527633A CA2527633A1 (fr) 2003-04-30 2003-04-30 Procede d'emission multi-modulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2003/000321 WO2004098139A1 (fr) 2003-04-30 2003-04-30 Procede d'emission multi-modulation

Publications (1)

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WO2004098139A1 true WO2004098139A1 (fr) 2004-11-11

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KR (1) KR100974533B1 (fr)
CN (1) CN1765092B (fr)
AU (1) AU2003231522A1 (fr)
CA (1) CA2527633A1 (fr)
WO (1) WO2004098139A1 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN107980114A (zh) * 2017-10-26 2018-05-01 深圳市汇顶科技股份有限公司 非正交解调模块、触控系统及非正交解调方法
CN115208730A (zh) * 2022-06-30 2022-10-18 南京工程学院 一种对码元信号进行临频差分调制解调的方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2527633A1 (fr) 2003-04-30 2004-11-11 Dequn Liang Procede d'emission multi-modulation
CN103001918B (zh) * 2012-12-14 2016-02-10 东北电力大学 非正交频分复用数据的传输方法
CN104468454B (zh) * 2014-12-29 2018-10-30 大连海事大学 多重正交频分复用调制解调方法
CN104601517B (zh) * 2015-02-28 2018-03-23 大连海事大学 一种时延多载波调制解调方法
CN106850491B (zh) * 2017-01-11 2020-07-28 四川工程职业技术学院 一种非正交频分复用数据发送传输方法

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EP0975196A2 (fr) * 1998-07-24 2000-01-26 Hughes Electronics Corporation Radiocommunication à modulations multiples
WO2003007566A1 (fr) * 2001-07-09 2003-01-23 Nokia Corporation Transmission de donnees par paquets a modulation dqpsk variable

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CA2527633A1 (fr) 2003-04-30 2004-11-11 Dequn Liang Procede d'emission multi-modulation

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Publication number Priority date Publication date Assignee Title
WO1998043401A2 (fr) * 1997-03-21 1998-10-01 Motorola Inc. Modem execute par logiciel et destine a fonctionner sur un ordinateur universel dans un environnement a temps differe
EP0975196A2 (fr) * 1998-07-24 2000-01-26 Hughes Electronics Corporation Radiocommunication à modulations multiples
WO2003007566A1 (fr) * 2001-07-09 2003-01-23 Nokia Corporation Transmission de donnees par paquets a modulation dqpsk variable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107980114A (zh) * 2017-10-26 2018-05-01 深圳市汇顶科技股份有限公司 非正交解调模块、触控系统及非正交解调方法
CN115208730A (zh) * 2022-06-30 2022-10-18 南京工程学院 一种对码元信号进行临频差分调制解调的方法
CN115208730B (zh) * 2022-06-30 2023-08-18 南京工程学院 一种对码元信号进行临频差分调制解调的方法

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KR20060119713A (ko) 2006-11-24
CN1765092B (zh) 2010-05-26
AU2003231522A1 (en) 2004-11-23
CN1765092A (zh) 2006-04-26
JP2006524923A (ja) 2006-11-02
CA2527633A1 (fr) 2004-11-11
KR100974533B1 (ko) 2010-08-10

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