WO2018016718A2 - Appareil et procédé permettant de réduire un rapport puissance crête/puissance moyenne dans un système multiporteuse à banc de filtres - Google Patents

Appareil et procédé permettant de réduire un rapport puissance crête/puissance moyenne dans un système multiporteuse à banc de filtres Download PDF

Info

Publication number
WO2018016718A2
WO2018016718A2 PCT/KR2017/003870 KR2017003870W WO2018016718A2 WO 2018016718 A2 WO2018016718 A2 WO 2018016718A2 KR 2017003870 W KR2017003870 W KR 2017003870W WO 2018016718 A2 WO2018016718 A2 WO 2018016718A2
Authority
WO
WIPO (PCT)
Prior art keywords
data symbols
sign inversion
sign
rule
inversion rule
Prior art date
Application number
PCT/KR2017/003870
Other languages
English (en)
Korean (ko)
Other versions
WO2018016718A3 (fr
Inventor
최권휴
라동준
Original Assignee
영남대학교 산학협력단
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 영남대학교 산학협력단 filed Critical 영남대학교 산학협력단
Publication of WO2018016718A2 publication Critical patent/WO2018016718A2/fr
Publication of WO2018016718A3 publication Critical patent/WO2018016718A3/fr

Links

Images

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
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
    • 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
    • H04L27/2614—Peak power aspects
    • H04L27/2621—Reduction thereof using phase offsets between subcarriers
    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • 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
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/264—Pulse-shaped multi-carrier, i.e. not using rectangular window
    • 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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated

Definitions

  • Embodiments of the present invention relate to a transmission / reception technique using a filterbank multicarrier technique, and more particularly, to an FBMC / OQAM technique using DFT spreading.
  • FBMC filter bank multi-carrier
  • PAPR peak to average power ratio
  • the Offset Quadrature Amplitude Modulation (FBMC / OQAM) technique produces a single carrier effect due to the structural problem of OQAM even when the Discrete Fourier Transform (DFT) spread is applied like the Single Carrier-Frequency Division Multi Access (SC-FDMA) technique. There is no problem.
  • DFT Discrete Fourier Transform
  • Embodiments of the present invention provide an apparatus and method for reducing peak-to-average power ratio (PAPR) in a filterbank multi-carrier system.
  • PAPR peak-to-average power ratio
  • a transmission apparatus includes a DFT unit configured to perform N-point (N is the number of subcarriers) -point Discrete Fourier Transform (DFT) on parallel data symbols to generate DFT spread data symbols; Applying a first sign inversion rule to the DFT spread data symbols to generate first data symbols, and applying a second sign inversion rule different from the first sign inversion rule to the DFT spread data symbols to generate a second data symbol.
  • a code inversion unit for generating data symbols, each of the first data symbol and the second data symbol are modulated by a filter bank multicarrier (FBMC) / quadrature amplitude modulation (OQAM) scheme to generate a first transmission candidate signal and a second transmission candidate signal.
  • FBMC filter bank multicarrier
  • OFQAM quadrature amplitude modulation
  • PAPR peak-to-average power ratio
  • the code inverting unit inverts the imaginary code of the data symbols to be transmitted by the odd-numbered subcarriers of the DFT spread data symbols to generate the first data symbols, and real numbers of the data symbols to be transmitted by the odd-numbered subcarrier.
  • the second data symbols may be generated by inverting a negative sign.
  • the code inverting unit inverts the imaginary code of the data symbols to be transmitted by the even-numbered subcarriers of the DFT spread data symbols to generate the first data symbols, and real numbers of the data symbols to be transmitted by the even-numbered subcarrier.
  • the second data symbols may be generated by inverting a negative sign.
  • the selector may transmit information on a code inversion rule applied to the transmission signal together with the transmission signal.
  • a method of generating DFT spread data symbols by performing N (where N is the number of subcarriers) -point Discrete Fourier Transform (DFT) on parallel data symbols.
  • Generating first data symbols by applying a first code inversion rule to DFT spread data symbols, modulating the first data symbols by FBMC / Quadrature Amplitude Modulation (OQAM), and transmitting the first data symbols.
  • N is the number of subcarriers
  • OFDM Quadrature Amplitude Modulation
  • Step and selected as the first transmit signal and said second candidate the candidate transmission signal of the peak or the peak-to-average power ratio (PAPR) is a transmission signal to the small signal comprises the step of transmitting.
  • the generating of the first data symbols may include generating the first data symbols by inverting an imaginary code of data symbols to be transmitted by an odd-numbered subcarrier among the DFT spread data symbols and generating the second data symbols.
  • the generating may include generating the second data symbols by inverting the real part codes of the data symbols to be transmitted by the odd subcarriers.
  • the generating of the first data symbols may include generating the first data symbols by inverting an imaginary code of data symbols to be transmitted by an even-numbered subcarrier among the DFT spread data symbols and generating the second data symbols.
  • the second data symbols may be generated by inverting the real part code of the data symbols to be transmitted by the even subcarrier.
  • the transmitting may include transmitting information on a code inversion rule applied to the transmission signal together with the transmission signal.
  • a reception apparatus modulates a received signal modulated by a Filter Bank Multicarrier (FBMC) / Quadrature Amplitude Modulation (OQAM) scheme by applying a code reversal rule to discrete fourier transform (DFT) spread data symbols.
  • a demodulator for demodulating in the FBMC / OQAM scheme; a sign inverter for performing sign inversion on data symbols obtained by the demodulation according to sign inversion rule information for the sign inversion rule received together with the received signal;
  • an IDFT unit configured to generate estimated data symbols by performing an N (where N is the number of subcarriers) -point Inverse Discrete Fourier Transform (IDFT) on the data symbols on which sign inversion is performed.
  • N is the number of subcarriers
  • IDFT Inverse Discrete Fourier Transform
  • the sign inversion unit may invert the sign of the real part or the imaginary part of the data symbols transmitted by the odd subcarriers among the data symbols obtained by the demodulation according to the received sign inversion rule information.
  • the sign inversion unit may invert the sign of the real part or the imaginary part of the data symbols transmitted by the even subcarrier among the data symbols obtained by the demodulation according to the received sign inversion rule information.
  • a reception method includes a received signal modulated by a Filter Bank Multicarrier (FBMC) / Quadrature Amplitude Modulation (OQAM) scheme by applying a code reversal rule to discrete Fourier Transform (DFT) spread data symbols; Receiving sign inversion rule information for the sign inversion rule, demodulating the received signal by the FBMC / OQAM scheme, and performing sign inversion on data symbols obtained by the demodulation according to the sign inversion rule information And performing an N (where N is the number of subcarriers) -point Inverse Discrete Fourier Transform (IDFT) on the data symbols on which the sign reversal has been performed to generate estimated data symbols.
  • N is the number of subcarriers
  • IDFT Inverse Discrete Fourier Transform
  • the sign of the real part or the imaginary part of the data symbols transmitted by the odd subcarriers among the data symbols obtained by the demodulation may be inverted according to the received sign inversion rule information.
  • the performing of the sign inversion may invert the sign of the real part or the imaginary part of the data symbols transmitted by the even subcarriers among the data symbols obtained by the demodulation according to the received sign inversion rule information.
  • a reception apparatus modulates a received signal modulated by a Filter Bank Multicarrier (FBMC) / Quadrature Amplitude Modulation (OQAM) scheme by applying a code reversal rule to discrete fourier transform (DFT) spread data symbols.
  • FBMC Filter Bank Multicarrier
  • OFAM Quadrature Amplitude Modulation
  • a demodulator for demodulating according to the FBMC / OQAM scheme a sign inversion unit for performing sign inversion on the data symbols obtained by the demodulation, and N for the data symbols on which sign inversion is performed (where N is the number of subcarriers)
  • N the number of subcarriers
  • IDFT point inverse discrete fourier transform
  • the code inversion unit is controlled to perform sign inversion with respect to the IDFT unit from the data symbols on which sign inversion is performed according to the first sign inversion rule.
  • the first code inversion rule and the second estimated data symbols generated by the IDFT unit from the first estimated data symbols generated and the data symbols in which sign inversion is performed according to the second code inversion rule;
  • An estimation for estimating one of the second sign inversion rules as a sign inversion rule applied to the received signal and controlling the sign inversion unit to perform sign inversion on the data symbols of the one frame according to the estimated sign inversion rule Contains wealth.
  • the estimator is configured to apply one of the first code inversion rule and the second code inversion rule to the received signal based on the discriminating coordinates of the real part and the imaginary part of the first estimated data symbols and the second estimated data symbols. It can be estimated by the sign inversion rule.
  • the estimator compares the variance of the real part and the imaginary part of the first estimated data symbols with the variance of the real part and the imaginary part of the second estimated data symbols according to the discriminating coordinates, thereby determining the first sign inversion rule and One of the second sign inversion rules may be estimated as a sign inversion rule applied to the received signal.
  • the first code inversion rule inverts the sign of an imaginary part of data symbols transmitted by an odd-numbered subcarrier among the data symbols obtained by the demodulation
  • the second code inversion rule is data obtained by the demodulation.
  • the symbols of the real part of the data symbols transmitted by the odd subcarriers among the symbols may be inverted.
  • the first sign inversion rule inverts the sign of an imaginary part of data symbols transmitted by an even-numbered subcarrier among the data symbols obtained by the demodulation
  • the second sign inversion rule is data obtained by the demodulation.
  • the symbols of the real part of the data symbols transmitted by the even subcarrier among the symbols may be inverted.
  • a reception method modulated by a Filter Bank Multicarrier (FBMC) / Quadrature Amplitude Modulation (OQAM) scheme is applied by applying a code inversion rule to discrete Fourier Transform (DFT) spread data symbols.
  • FBMC Filter Bank Multicarrier
  • OFAM Quadrature Amplitude Modulation
  • the estimating may include receiving one of the first sign inversion rule and the second sign inversion rule based on the discriminating coordinates of the real part and the imaginary part of the first estimated data symbols and the second estimated data symbols. It can be estimated by the sign inversion rule applied to.
  • the estimating may include comparing a variance of the first estimated data symbols with the real part and the imaginary part and the variance of the second estimated data symbols with the real part and the imaginary part, thereby inverting the first sign.
  • One of a rule and the second sign inversion rule may be estimated as a sign inversion rule applied to the received signal.
  • the first code inversion rule inverts the sign of an imaginary part of data symbols transmitted by an odd-numbered subcarrier among the data symbols obtained by the demodulation
  • the second code inversion rule is data obtained by the demodulation.
  • the symbols of the real part of the data symbols transmitted by the odd subcarriers among the symbols may be inverted.
  • the first sign inversion rule inverts the sign of an imaginary part of data symbols transmitted by an even-numbered subcarrier among the data symbols obtained by the demodulation
  • the second sign inversion rule is data obtained by the demodulation.
  • the symbols of the real part of the data symbols transmitted by the even subcarrier among the symbols may be inverted.
  • the FBMC / OQAM modulation is performed by inverting the code according to a specific rule in the FBMC / OQAM scheme using DFT spreading to perform FBMC / OQAM modulation. It can effectively improve peak-to-average power ratio (PAPR) performance while retaining the benefits.
  • PAPR peak-to-average power ratio
  • PAPR peak-to-average power ratio
  • FIG. 1 is a diagram illustrating an equivalent equation structure for a transmitting end of a conventional FBMC / OQAM (Filter Bank Multi-Carrier / Offset Quadrature Amplitude Modulation) technique.
  • FBMC / OQAM Finter Bank Multi-Carrier / Offset Quadrature Amplitude Modulation
  • FIG. 2 is a diagram illustrating an equivalent equation structure for a transmitter of a conventional DFT spreading FBMC / OQAM scheme in which a Discrete Fourier Transform (DFT) spreading process is added.
  • DFT Discrete Fourier Transform
  • FIG. 3 is a diagram illustrating an implementation structure in which the equation structure shown in FIG. 2 is modified into a structure that can be actually implemented.
  • FIG. 4 shows an equivalent mathematical structure for the implementation structure shown in FIG.
  • FIG. 5 is a block diagram of an apparatus for transmitting a filter bank multicarrier system according to an exemplary embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an equivalent equation structure of a sign inverting unit 520 and a modulator 530 for generating a first transmission signal candidate according to an embodiment of the present invention.
  • FIG. 7 illustrates an actual implementation structure for the equivalent mathematical structure shown in FIG. 6.
  • FIG. 8 is a diagram illustrating an equivalent equation structure of the sign inverting unit 520 and the modulator 530 for generating a second transmission signal candidate according to an embodiment of the present invention.
  • FIG. 9 illustrates an actual implementation structure of the equivalent mathematical structure shown in FIG. 8.
  • FIG 10 shows an overall implementation structure of an apparatus according to an embodiment of the present invention.
  • FIG 11 illustrates an overall implementation structure of an apparatus according to another embodiment of the present invention.
  • FIG. 12 is a diagram illustrating an equivalent equation structure for a receiver of a conventional FBMC / OQAM scheme.
  • FIG. 13 is a diagram illustrating an actual implementation structure of a receiver of the conventional FBMC / OQAM scheme illustrated in FIG. 12.
  • FIG. 14 is a block diagram of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 15 is a diagram illustrating an actual implementation structure of the reception device illustrated in FIG. 14.
  • 16 is a block diagram of a receiving apparatus according to another embodiment of the present invention.
  • FIG. 17 is a diagram illustrating an actual implementation structure of the reception device illustrated in FIG. 16.
  • FIG. 1 is a diagram illustrating an equivalent equation structure for a transmitting end of a conventional FBMC / OQAM (Filter Bank Multi-Carrier / Offset Quadrature Amplitude Modulation) technique.
  • FBMC / OQAM Finter Bank Multi-Carrier / Offset Quadrature Amplitude Modulation
  • Equation 1 Mth data symbol transmitted by nth subcarrier in FBMC / OQAM scheme May be represented by Equation 1 below.
  • N is the number of subcarriers allocated to each user
  • M is the length of the frame.
  • m, n, N, and M are interpreted by the same meaning.
  • parallel data symbols are divided into a real part and an imaginary part and input in units of T seconds (110).
  • T is each parallel data symbol Represents a symbol section.
  • the real part of the data symbol to be transmitted by the nth subcarrier is input to the prototype filter h (t) as it is, and the imaginary part is multiplied by the imaginary j and then the prototype filter h (tT / 2) delayed by T / 2 on the time axis Enter (120).
  • the impulse response length of the prototype filter is determined by the superposition coefficient of the filter.
  • the nth subcarrier is Multiply by 130.
  • the transmission signal by adding all the signals multiplied by the subcarrier Generate (140).
  • the transmission signal Equation is as shown in Equation 2 below.
  • the conventional FBMC / OQAM scheme shown in FIG. 1 has a high peak to average power ratio (PAPR) due to multi-carrier modulation.
  • PAPR peak to average power ratio
  • FIG. 2 is a diagram illustrating an equivalent equation structure for a transmitter of a conventional DFT spreading FBMC / OQAM scheme to which a Discrete Fourier Transform (DFT) spreading process is added.
  • DFT Discrete Fourier Transform
  • the conventional DFT spreading FBMC / OQAM scheme performs a process of performing DFT spreading on parallel data symbols in the transmit structure of the FBMC / OQAM scheme of FIG. 1 to reduce the peak-to-average power ratio (PAPR). ) Is preceded.
  • PAPR peak-to-average power ratio
  • DFT spread data symbols It can be represented as
  • Equation 3 Is the nth element of May be expressed as Equation 3 below.
  • the structure after the DFT spreading process 210 in the transmitting end structure of the conventional DFT spreading FBMC / OQAM scheme shown in FIG. 2 is the same as the transmitting end structure of the conventional FBMC / OQAM technique shown in FIG.
  • Equation 4 the transmission signal equation of the conventional DFT spreading FBMC / OQAM scheme shown in FIG. 2 is expressed by Equation 4 below.
  • FIG. 3 is a diagram illustrating an implementation structure in which the equation structure shown in FIG. 2 is modified to a structure that can be actually implemented.
  • Equation 5 The equation of the transmission signal generated by the implementation structure shown in FIG. 3 is shown in Equation 5 below.
  • FIG. 3 The implementation structure shown in FIG. 3 is represented by an equivalent mathematical structure for the transmission signal of Equation 5 as shown in FIG. 4.
  • an equivalent equation structure for a transmission signal of Equation 5 may be compared to an imaginary part of data symbols to be transmitted by each subcarrier, compared to the equation structure shown in FIG. 2. It can be seen that the phase component of is multiplied (410), which causes a reduction in the peak-to-average power ratio (PAPR) reduction effect due to DFT spreading.
  • PAPR peak-to-average power ratio
  • FIG. 5 is a block diagram of an apparatus for transmitting a filter bank multicarrier system according to an exemplary embodiment of the present invention.
  • a transmission apparatus 500 includes a DFT unit 510, a code inversion unit 520, a modulator 530, and a selector 540.
  • the DFT unit 510 performs N-point DFT on the parallel data symbols to generate DFT spread data symbols.
  • the sign inversion unit 520 generates first data symbols by applying a first sign inversion rule to the data symbols DFT-spread by the DFT unit 510, and generates a first sign inversion rule in the DFT spread data symbols. Different second sign inversion rules are applied to generate second data symbols.
  • the sign inverting unit 520 generates the first data symbols by inverting the sign of the imaginary part of the data symbols to be transmitted by the odd subcarriers of the DFT spread data symbols
  • Second data symbols may be generated by reversing the sign of the real part of the data symbols to be transmitted by the odd subcarriers among the spread data symbols.
  • the modulator 530 modulates each of the first data symbols and the second data symbols on which the sign inversion is performed by the sign inverting unit 520 in the FBMC / OQAM scheme, thereby the first transmission candidate signal and the second transmission candidate signal.
  • the selector 540 measures the peak or peak-to-average power ratio (PAPR) for each of the first transmission candidate signal and the second transmission candidate signal generated by the modulation unit 530, and selects the first transmission candidate signal and the first transmission candidate signal. 2 Among the transmission candidate signals, a signal having a small peak value or peak-to-average power ratio (PAPR) is selected and transmitted as a transmission signal.
  • PAPR peak-to-average power ratio
  • the selector 540 may transmit information on the code inversion rule applied to the transmission signal together with the transmission signal.
  • FIG. 6 is a diagram illustrating an equivalent equation structure of the sign inverting unit 520 and the modulator 530 for generating a first transmission signal candidate according to an embodiment of the present invention.
  • the sign inversion unit 520 extracts an imaginary part and a real part for each of the DFT spread data symbols generated by the DFT unit 510 and extracts the imaginary part from the imaginary part.
  • the phase component of can be multiplied by
  • each subcarrier Phase component of The phase component of is multiplied by Is multiplied by an imaginary number in the conventional FBMC / OQAM implementation.
  • the phase component of can be canceled out.
  • PAPR peak-to-average power ratio
  • Equation 6 the first transmission signal candidate generated by the modulator 530 according to the example shown in FIG. 6.
  • the equation of is as shown in Equation 6 below.
  • the actual implementation of the equivalent equation structure of the sign inverting unit 520 illustrated in FIG. 6 is transmitted by an odd subcarrier among the data symbols spread by the DFT unit 510.
  • Inverting the imaginary code of the data symbols to be implemented may be implemented, and the modulation unit 530 may have the same structure as that of the conventional FBMC / OQAM modulation scheme.
  • FIG 8 illustrates an equivalent mathematical structure of the sign inverting unit 520 and the modulator 530 for generating a second transmission signal candidate according to an embodiment of the present invention.
  • the sign inversion unit 520 extracts an imaginary part and a real part from each of the DFT spread data symbols generated by the DFT part 510.
  • the phase component of can be multiplied by
  • the real part and the imaginary part of data symbols to be transmitted by each subcarrier Since the same phase components are multiplied so that the phase difference between the real part and the imaginary part is the same, the peak-to-average power ratio (PAPR) can be reduced.
  • PAPR peak-to-average power ratio
  • Equation 7 the second transmission signal candidate generated by the modulator 530 according to the example shown in FIG. 8 Equation 7 is as shown in Equation 7 below.
  • the actual implementation of the equivalent mathematical structure of the sign inverting unit 520 illustrated in FIG. 8 is transmitted by an odd subcarrier among the data symbols spread by the DFT unit 510.
  • Inverting the real part code of the data symbols to be implemented may be implemented, and the modulator 530 may have the same structure as that of the conventional FBMC / OQAM modulation scheme.
  • FIG. 10 is a diagram showing the overall implementation structure of the transmitting apparatus 500 according to an embodiment of the present invention.
  • i denotes a sign inversion rule applied to the DFT spread data symbols, and is interpreted in the same sense hereinafter.
  • the first data symbols are generated, and the modulator 530 modulates the first data symbols in an FBMC / OQAM scheme to thereby generate a first transmission signal candidate.
  • the modulator 530 modulates the second data symbols in an FBMC / OQAM scheme to generate a second transmission signal candidate.
  • the selector 540 selects the first transmission signal candidate.
  • the second transmission signal candidate Determine the peak or peak-to-average power ratio (PAPR) for each of the transmitted signal candidates with the smallest peak or peak-to-average power ratio (PAPR). To select.
  • PAPR peak or peak-to-average power ratio
  • the peak of can be measured according to Equation 8 below.
  • the peak of can also be measured in the same way.
  • K represents the impulse response length of the prototype filter h (t), it is interpreted as the same meaning below.
  • the peak-to-average power ratio of PAPR may be measured according to Equation 9 below,
  • the peak-to-average power ratio of PAPA can also be measured in the same way.
  • sign inversion is performed on data symbols to be transmitted by odd-numbered subcarriers among the DFT spread data symbols, but is not limited thereto.
  • the modulator 530 modulates the second data symbols in an FBMC / OQAM scheme to generate a second transmission signal candidate.
  • the selector 540 selects the first transmission signal candidate.
  • the second transmission signal candidate Determine the peak or peak-to-average power ratio (PAPR) for each of the transmitted signal candidates with the smallest peak or peak-to-average power ratio (PAPR). To select.
  • PAPR peak or peak-to-average power ratio
  • FIG. 12 is a diagram illustrating an equivalent equation structure for a receiver of a conventional FBMC / OQAM scheme.
  • a reception signal of a conventional FBMC / OQAM scheme first receives a signal. After multiplying the subcarrier by 1210, h (t) and h (tT / 2) are input to the prototype filters h (t-mT) and h (tT / 2-mT), which are delayed by mT on the time axis (1220). ).
  • FIG. 12 the actual implementation structure of the receiver of the conventional FBMC / OQAM scheme shown in FIG. 12 is shown in FIG.
  • FIG. 14 is a block diagram of a receiving apparatus 1400 according to an embodiment of the present invention.
  • the reception device 1400 includes a demodulator 1410, a sign inversion unit 1420, and a DFT unit 1430.
  • the demodulator 1410 demodulates the received signal by the FBMC / OQAM method.
  • the received signal is a signal modulated and transmitted by the transmitting apparatus 500 shown in FIG. 5.
  • the received signal may be a signal modulated in the FBMC / OQAM scheme by applying a specific code inversion rule to the DFT spread data symbols.
  • the specific sign inversion rule may be sign inversion of an imaginary part or a real part of data symbols to be transmitted by an odd subcarrier among the DFT spread data symbols.
  • the specific sign inversion rule may be a sign inversion of an imaginary part or a real part of data symbols to be transmitted by an even subcarrier among the DFT spread data symbols.
  • the sign inversion unit 1420 performs inversion of the data symbols demodulated by the demodulator 1410 according to the sign inversion rule information included in the received signal.
  • the IDFT unit 1430 generates estimated data symbols by performing an N-point Inverse Discrete Fourier Transform (IDFT) on the data symbols on which the sign inversion is performed by the sign inversion unit 1420.
  • IDFT Inverse Discrete Fourier Transform
  • FIG. 15 is a diagram illustrating an actual implementation structure of the receiving apparatus 1400 illustrated in FIG. 14.
  • the demodulator 1410 receives a received signal in the same manner as the conventional FBMC / OQAM technique. Demodulate.
  • the sign inversion unit 1420 extracts the real part and the imaginary part of each data symbol demodulated by the demodulation unit 1420 and performs sign inversion according to the sign inversion information i received together with the received signal.
  • the sign inversion unit 1420 may include an imaginary part of the data symbols transmitted by the odd subcarriers among the data symbols demodulated by the demodulator 1420.
  • the sign is inverted and the value of i is 1, the sign of the real part of the data symbols transmitted by the odd subcarriers among the data symbols demodulated by the demodulator 1420 may be inverted.
  • the sign inversion unit 1420 has an even subcarrier among the data symbols demodulated by the demodulator 1420 when the i value is 0. Inverts the sign of the imaginary part of the data symbols transmitted by the symbol, and if the value of i is 1, inverts the sign of the real part of the data symbols transmitted by the even subcarriers of the data symbols demodulated by the demodulator 1420. Can be.
  • the IDFT unit 1430 multiplies the imaginary part of each data symbol output by the sign inverting unit 1420 by an imaginary number j, adds the real part, and then performs an N-point IDFT to estimate the data symbol. Can be obtained.
  • the estimated data symbol is Can be expressed as and Denotes estimated data symbols of the real part and the imaginary part, respectively.
  • 16 is a block diagram of a receiving apparatus according to another embodiment of the present invention.
  • a receiver 1600 includes a demodulator 1610, a code inverter 1620, an IDFT unit 1630, and an estimator 1640.
  • the sign inversion unit 1620 performs sign inversion on at least some of the data symbols of one frame demodulated by the demodulator 1610 under the control of the estimator 1640.
  • the IDFT unit 1630 performs N-point IDFT on the data symbols outputted by the sign inversion unit 1620 and outputs the estimated data symbols.
  • the estimator 1640 estimates the sign inversion rule (i) applied to the received signal and controls the sign inversion performed by the sign inversion unit 1620 according to the estimated sign inversion rule.
  • FIG. 17 is a diagram illustrating an actual implementation structure of the reception apparatus 1600 illustrated in FIG. 16.
  • sign inversion may be performed on at least some of the data symbols of one frame demodulated by the demodulator 1610.
  • the IDFT unit 1630 generates the first estimated data symbol by performing IDFT on the data symbols on which the sign inversion is performed by the sign inversion unit 1620.
  • the estimated data symbols of the real part and the imaginary part of the first estimated data symbol acquired by the IDFT unit 1630 are respectively obtained.
  • the estimation unit 1640 according to a quadrature amplitude modulation (QAM) scheme.
  • QAM quadrature amplitude modulation
  • the estimator 1640 is classified based on each of the discriminating coordinates using, for example, Equation 10 below.
  • silver Represents the discriminating coordinate of
  • silver Indicates the discriminating coordinate of.
  • sign inversion may be performed on at least some of the data symbols of one frame demodulated by the demodulator 1610.
  • the IDFT unit 1630 generates the second estimated data symbol by performing IDFT on the data symbols on which the sign inversion is performed by the sign inversion unit 1620.
  • the estimated data symbols of the real part and the imaginary part of the second estimated data symbol acquired by the IDFT unit 1630 are respectively obtained.
  • the estimation unit 1640 according to the QAM method.
  • Wow Are classified into respective discriminating coordinates, and classified according to each discriminating coordinate using Equation 11 below.
  • Wow Dispersion Can be obtained.
  • silver represents the discriminating coordinate of silver Indicates the discriminating coordinate of.
  • the estimator 1640 By comparing the Equation 12, the sign reversal rule can be estimated.
  • the sign inversion unit 1620 controls the sign inversion of data symbols of one frame according to the value, and the IDFT unit 1630 According to a value, an N-point IDFT may be performed on data symbols on which sign inversion is performed, thereby finally generating estimated data symbols.
  • the sign inverting unit 1620 has an i value. And According to the value, it is possible to invert the imaginary part and the real part of the data symbols transmitted by the even subcarriers.
  • an embodiment of the present invention may include a computer readable recording medium including a program for performing the methods described herein on a computer.
  • the computer-readable recording medium may include program instructions, local data files, local data structures, etc. alone or in combination.
  • the media may be those specially designed and constructed for the purposes of the present invention, or those conventionally available in the field of computer software.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like.
  • Hardware devices specifically configured to store and execute program instructions are included.
  • Examples of program instructions may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'invention concerne un appareil et un procédé permettant de réduire un rapport puissance crête/puissance moyenne (PAPR) dans un système multiporteuse à banc de filtres. Un appareil de transmission selon un mode de réalisation de la présente invention comprend : une unité de transformée de Fourier discrète (DFT) pour générer des symboles de données à étalement DFT via l'exécution d'une DFT à N points (N étant le nombre de sous-porteuses) sur des symboles de données parallèles ; une unité d'inversion de signe pour générer des premiers symboles de données via l'application d'une première règle d'inversion de signe sur les symboles de données à étalement DFT, et générer des seconds symboles de données via l'application d'une seconde règle d'inversion de signe, qui est différente de la première règle d'inversion de signe, sur les symboles de données à étalement DFT ; une unité de modulation pour générer un premier signal de transmission candidat et un second signal de transmission candidat via la modulation des premiers symboles de données et des seconds symboles de données selon un schéma de modulation d'amplitude en quadrature à décalage (OQAM)/multiporteuse à banc de filtres (FBMC) respectivement ; et une unité de sélection pour mesurer une valeur de crête ou un rapport puissance crête/puissance moyenne (PAPR) du premier signal de transmission candidat et du second signal de transmission candidat, sélectionner un signal de transmission ayant la plus petite valeur de crête ou le plus petit PAPR entre le premier signal de transmission candidat et le second signal de transmission candidat, et transmettre le signal de transmission sélectionné.
PCT/KR2017/003870 2016-07-20 2017-04-10 Appareil et procédé permettant de réduire un rapport puissance crête/puissance moyenne dans un système multiporteuse à banc de filtres WO2018016718A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160092250A KR101807193B1 (ko) 2016-07-20 2016-07-20 필터뱅크 다중 반송파 시스템에서 첨두 대 평균전력 비를 감소시키기 위한 장치 및 방법
KR10-2016-0092250 2016-07-20

Publications (2)

Publication Number Publication Date
WO2018016718A2 true WO2018016718A2 (fr) 2018-01-25
WO2018016718A3 WO2018016718A3 (fr) 2018-08-02

Family

ID=60919972

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/003870 WO2018016718A2 (fr) 2016-07-20 2017-04-10 Appareil et procédé permettant de réduire un rapport puissance crête/puissance moyenne dans un système multiporteuse à banc de filtres

Country Status (2)

Country Link
KR (1) KR101807193B1 (fr)
WO (1) WO2018016718A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190288897A1 (en) * 2016-10-12 2019-09-19 Enensys Technologies Method for selecting a data signal for generating a modulated signal, selection device and corresponding computer program
CN114826838A (zh) * 2022-05-19 2022-07-29 南京信息工程大学 基于前导序列的fbmc雷达通信一体化系统信道估计算法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108449301B (zh) * 2018-03-27 2020-01-03 华中科技大学 一种数据传输方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100866981B1 (ko) * 2006-01-13 2008-11-05 한국전자통신연구원 직교 주파수 분할 다중화 심볼을 생성하고 수신하는 장치및 방법
JP5340199B2 (ja) * 2010-02-18 2013-11-13 日本放送協会 マルチキャリア変調装置及び復調装置
CN102904854A (zh) * 2011-07-29 2013-01-30 上海贝尔股份有限公司 一种在滤波器组多载波系统中减小峰均比的方法和装置
JP5699917B2 (ja) * 2011-11-25 2015-04-15 アイコム株式会社 通信機および通信方法
CN104823402B (zh) * 2012-11-29 2017-07-28 Idac控股公司 一种用于在无线通信设备内执行多载波调制的方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190288897A1 (en) * 2016-10-12 2019-09-19 Enensys Technologies Method for selecting a data signal for generating a modulated signal, selection device and corresponding computer program
CN114826838A (zh) * 2022-05-19 2022-07-29 南京信息工程大学 基于前导序列的fbmc雷达通信一体化系统信道估计算法
CN114826838B (zh) * 2022-05-19 2023-04-25 南京信息工程大学 基于前导序列的fbmc雷达通信一体化系统信道估计算法

Also Published As

Publication number Publication date
WO2018016718A3 (fr) 2018-08-02
KR101807193B1 (ko) 2017-12-08

Similar Documents

Publication Publication Date Title
WO2018016718A2 (fr) Appareil et procédé permettant de réduire un rapport puissance crête/puissance moyenne dans un système multiporteuse à banc de filtres
WO2017171519A1 (fr) Procédé et appareil d'émission d'un canal de commande et d'un canal de données dans une communication v2x
WO2011139081A2 (fr) Appareil et procédé d'émission et de réception de paramètre de décalage cyclique pour supporter l'orthogonalité dans un environnement mimo
WO2013022270A2 (fr) Dispositif récepteur d'un système de communications ofdm et procédé d'atténuation de son bruit de phase
WO2010131818A1 (fr) Méthode d'atténuation des interférences entre cellules utilisant la méthode d'estimation à matrice de covariance spatiale d'un système d'atténuation des interférences entre cellules d'un système mrof d'antennes mems
WO2016028050A1 (fr) Procédé et système pour envoyer un signal de référence, procédé et système pour recevoir un signal de référence
WO2009136728A2 (fr) Dispositif de génération d'informations de canal et procédé d'utilisation d'algorithme de multiplexage spatial dans un système de communication sans fil, et appareil et procédé de transmission de données mettant en oeuvre ledit dispositif et ledit procédé
WO2021071215A1 (fr) Procédé permettant de transmettre un signal de référence et appareil l'utilisant
WO2016200188A1 (fr) Procédé pour déterminer des tonalités réservées, et émetteur pour exécuter une réduction de papr au moyen d'une réservation de tonalité
WO2016117793A1 (fr) Procédé et système d'amélioration de parole
WO2015130043A1 (fr) Procédé et appareil de modulation permettant une émission et une réception de signaux dans un système de communication mobile
WO2021141432A1 (fr) Procédé et appareil de suivi de paramètres pour l'estimation d'information d'état de canal
WO2010050734A2 (fr) Dispositif et procédé d’évitement d’interférences dans un système fhss
WO2014065586A1 (fr) Source, relais et destination exécutant une transmission en coopération, et leur procédé de commande
EP3420663A1 (fr) Procédé et appareil de transmission de signaux de référence de démodulation de liaison montante
WO2012043954A1 (fr) Émetteur et récepteur radio cognitifs pour améliorer la vitesse de transfert de données
WO2016163748A1 (fr) Dispositif et procédé pour détecter un signal de transmission
WO2020004862A1 (fr) Procédé et terminal pour accéder à un point d'accès dans un système de communications sans fil
WO2016104862A1 (fr) Procédé de formation de faisceau rf et appareils pour la réalisation de celui-ci
WO2016018032A1 (fr) Procédé et appareil pour réaliser une synchronisation de séquence dans un système de communication mobile
WO2018143716A1 (fr) Procédé de précodage pour supprimer un brouillage dans une communication en duplex intégral, et station de base et terminal utilisateur pour la mise en œuvre de ce procédé
WO2021107515A1 (fr) Procédé de chiffrement basé sur l'identité basé sur des réseaux
WO2023136500A1 (fr) Dispositif et procédé d'estimation de canal utilisant une séparation par décalage multicyclique
WO2015080485A1 (fr) Appareil et procédé de surveillance d'interférences dans un système de communication mobile à cellules multiples de réseau hétérogène
WO2018062628A1 (fr) Système multiporteuse de banc de filtres et procédé de filtrage

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17831192

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase in:

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17831192

Country of ref document: EP

Kind code of ref document: A2