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1.发明公开MODULATOR FOR GENERATING A MODULATED SIGNAL WITH A REDUCED TRANSMIT SPECTRUM 审中-公开用调制信号生成一个减少的发射谱的调制器
公开(公告)号：EP3308489A1
公开(公告)日：2018-04-18
申请号：EP15766081.2
申请日：2015-09-07
发明人： GAFFNEY, Brian
CPC分类号： H04L27/2057 , H04L27/2003 , H04L27/2634
摘要： The present invention relates to a modulator for generating a modulated signal with a reduced transmit spectrum, comprising a tone-phase shift keying unit configured to generate a TPSK-modulated signal, and a phase shifter configured to apply a predetermined phase shift to the TPSK-modulated signal to obtain a phase-shifted TPSK-modulated signal with reduced phase jumps.
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公开(公告)号：EP3205059A1
公开(公告)日：2017-08-16
申请号：EP15781803.0
申请日：2015-09-25
发明人： WANG, Xiao feng , LI, Junyi , YU, Zhi-zhong
CPC分类号： H04L27/2007 , H04L1/206 , H04L5/0005 , H04L27/2003 , H04L27/2057 , H04L27/2601 , H04L2025/03414
摘要： A method of wireless communication by a user equipment includes determining an allocation of a set of tones in a symbol for conveying data. The method further includes determining to use m-ary phase shift keying (MPSK) to modulate the data onto a subset of tones of the set of tones. The method further includes modulating the data onto the subset of tones based on a mapping, wherein the mapping maps pairs of data values with a largest Hamming distance from each other to pairs of constellation points with a maximum Euclidean distance from each other.
摘要翻译： 用户设备的无线通信方法包括确定用于传送数据的符号中的一组音调的分配。 该方法还包括确定使用m进制相移键控（MPSK）来将数据调制到该组音调的音调子集上。 该方法进一步包括基于映射将数据调制到音调子集上，其中映射将具有彼此最大汉明距离的数据值对映射到具有彼此最大欧几里德距离的星座点对。
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公开(公告)号：EP1057273B1
公开(公告)日：2006-11-08
申请号：EP99964591.4
申请日：1999-12-13
发明人： PHILIPPE, Pascal
CPC分类号： H04L27/2057 , H04B2001/0491
摘要： The present invention relates to a transmission circuit of a radio frequency signal, intended to receive an input signal (IN), comprising: a first frequency converter (FC1), having reference inputs intended to receive at least one differential signal, and intended to deliver a signal having a predetermined frequency called intermediate frequency, and a phase representative of that of the input signal (IN), and a second frequency converter (FC2) intended to deliver the radio frequency signal resulting from a conversion of the frequency of the output signal of the first frequency converter (FC1) into a tunable frequency. According to the invention, the first frequency converter (FC1) comprises digital means for selecting one of the reference inputs as a function of the value of the input signal (IN), for connecting it to the output of the first frequency converter (FC1). The invention enables to simplify the structure and the embodiment of the transmission circuit considerably and to improve the performance thereof. Application: Transmission of signals in radiotelephones.
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公开(公告)号：EP3391603A1
公开(公告)日：2018-10-24
申请号：EP16700117.1
申请日：2016-01-07
发明人： GAFFNEY, Brian
CPC分类号： H04L27/2003 , H04L27/0008 , H04L27/2057 , H04L27/2636
摘要： An apparatus for reducing out-of-band emissions of a carrier signal, in particular of a single carrier (SC) signal, adapted to: 1) determine a phase shift between consecutive modulation symbols of a carrier signal wherein the phase shift is based on a modulation type of the modulation symbols and/or a subcarrier frequency spectral location of the carrier signal to which the modulation symbols are mapped. 2) Apply the phase shift to the carrier signal. 3) Submit the carrier signal through a phase LPF in order to asymmetrically warp the frequency spectrum of the carrier signal for reducing out-of-band emissions induced by phase discontinuities between the consecutive modulation symbols.
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公开(公告)号：EP1057273A1
公开(公告)日：2000-12-06
申请号：EP99964591.4
申请日：1999-12-13
发明人： PHILIPPE, Pascal
CPC分类号： H04L27/2057 , H04B2001/0491
摘要： The present invention relates to a transmission circuit of a radio frequency signal, intended to receive an input signal (IN), comprising: a first frequency converter (FC1), having reference inputs intended to receive at least one differential signal, and intended to deliver a signal having a predetermined frequency called intermediate frequency, and a phase representative of that of the input signal (IN), and a second frequency converter (FC2) intended to deliver the radio frequency signal resulting from a conversion of the frequency of the output signal of the first frequency converter (FC1) into a tunable frequency. According to the invention, the first frequency converter (FC1) comprises digital means for selecting one of the reference inputs as a function of the value of the input signal (IN), for connecting it to the output of the first frequency converter (FC1). The invention enables to simplify the structure and the embodiment of the transmission circuit considerably and to improve the performance thereof. Application: Transmission of signals in radiotelephones.
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公开(公告)号：EP0932961A1
公开(公告)日：1999-08-04
申请号：EP98939768.0
申请日：1998-08-20
IPC分类号： H04L27
CPC分类号： H04L27/2335 , H04L27/2057
摘要： A local area network is described based on a ring of twisted pair cable links (UTP), each carrying at least 1.4 Mbps gross data rate. Each station on the network includes an encoder and following station includes a decoder for PSK (phase shift keying) modulated serial data. The encoder comprises an analogue sine wave oscillator and inverter (310, 312) for generating antiphase analogue sine wave signals (PHI, PHIB) at a carrier frequency and a switching circuit (314) for selecting between the carrier signals according to the data signal to be transmitted. The decoder (318) may comprise a simple integrator and comparator arrangement (U13, U14). The encoder and decoder may be provided in the form of an adapter circuit (210), such that a network based on optical fibre can be replaced by a network based on twisted pair cable using the same digital circuits. Generation of the PSK waveform by analogue circuitry rather than digital synthesis reduces radio frequency emissions to a level suitable for use in an automotive audio/video communications network.
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公开(公告)号：EP2856678A1
公开(公告)日：2015-04-08
申请号：EP12723384.9
申请日：2012-05-25
CPC分类号： H04L27/3405 , H04B10/2575 , H04L1/0002 , H04L1/0003 , H04L1/0015 , H04L5/006 , H04L27/2057 , H04L27/2096 , H04L27/362
摘要： The present disclosure is directed to a transmitter arrangement 200; 400 and a method therein for transmitting a signal Ο
B comprising a number of data streams D1, D2, D3, D4 and a number of sub-channels BP1, BP2, BP3, BP4; QP1, QP2; QA1 to a receiver 150 via a transmission link 140. The method comprises the actions of: obtaining link quality information indicative of the transmission conditions for the transmission link 140, and determining the number of sub-channels for the output signal based on obtained the transmission conditions such that the transmitted data throughput via the transmission link 140 remains the same and such that the transmitted data throughput is equally distributed between the determined number of sub-channels.-
8.发明公开DIGITAL COMMUNICATION METHOD AND DIGITAL COMMUNICATION DEVICE 审中-公开VERFAHREN UND EINRICHTUNG ZUR DIGITALEN KOMMUNIKATION
公开(公告)号：EP1551103A1
公开(公告)日：2005-07-06
申请号：EP03748684.2
申请日：2003-10-02
发明人： NAKAMURA, Makoto
CPC分类号： H03M13/3983 , H03M13/235 , H03M13/256 , H04L1/0054 , H04L1/0059 , H04L27/2057 , H04L27/2332
摘要： A digital communication device includes: a modulator having encoding means for converting two-dimensional digital information signal into a three-dimensional signal and phase modulation means for modifying the carrier phase in according to the three-dimensional signal; and a demodulator having phase demodulation means for detecting information on the three-dimensional signal from the received phase-modulated wave and demodulation means for deciding the two-dimensional digital information from the information on the three-dimensional signal. The digital communication device has a bit error ratio and an occupied radio band width equivalent to a digital communication device using the conventional QPSK or π /4 shift QPSK and the error correction method and greatly improves the amplitude fluctuation. Moreover, the digital communication device can transmit a signal with a narrower occupied frequency band width while maintaining the same constant envelope characteristic as the GMSK using the conventional error correction code.
摘要翻译： 数字通信装置包括：具有用于将二维数字信息信号转换为三维信号的编码装置的调制器和用于根据三维信号修改载波相位的相位调制装置; 以及解调器，具有用于从接收到的相位调制波检测关于三维信号的信息的相位解调装置和用于根据关于三维信号的信息来确定二维数字信息的解调装置。 数字通信设备具有与使用传统的QPSK或者pi / 4移位QPSK的数字通信设备相当的误比特率和占用的无线电带宽以及纠错方法，并且极大地改善了振幅波动。 此外，数字通信设备可以使用传统的纠错码在保持与GMSK相同的恒定包络特性的同时发送具有较窄占用频带宽度的信号。
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9.发明公开DIGITAL PHASE MODULATOR USING NON-LINEAR AMPLIFIERS AND A RING OSCILLATOR 审中-公开具有非线性放大器和环形振荡器，数字相位调制器
公开(公告)号：EP1095446A1
公开(公告)日：2001-05-02
申请号：EP00932024.3
申请日：2000-05-03
CPC分类号： H04L27/2057 , H03F1/0294
摘要： The modulator includes an oscillator generating signals, each having a different phase, and a selector receiving digital data. When the digital data received by the selector changes logic state, the selector supplies a first and second plurality of signals generated by the oscillator to first and second non-linear amplifiers, respectively. An adder then adds the output of each amplifier to generate a radio frequency output.
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公开(公告)号：EP0148906A1
公开(公告)日：1985-07-24
申请号：EP84902668.0
申请日：1984-06-25
申请人： WOLFDATA, INC.
发明人： FREDERICK, Carlton
IPC分类号： H04L27
CPC分类号： H04L27/2057 , H04L27/2337
摘要： Un modem entièrement numérique comprend un diviseur d'horloge (49, 63) pour générer quatre formes d'ondes (65, 67, 69, 71) à une fréquence de transmission désirée mais déphasées entre elles de 90 degrés, un premier microprocesseur (31) programmé pour recevoir des données numériques (33) à son entrée, pour convertir les donneés en dibits et sélectionner en tant que sortie (81) du modem l'une des quatre formes d'ondes déphasées de 90 degrés les unes par rapport aux autres. Pour démoduler des signaux arrivant, un détecteur de croisements zéro (107) détecte des croisements zéro d'un signal modulé arrivant, un second microprocesseur (127) couplé au détecteur de croisements zéro (107) reçoit les informations de croisements zéro avec des informations de parité et convertit les informations en dibits, et un troisième microprocesseur (128) reçoit des sorties dibits du second microprocesseur (127) et convertit les dibits en un flot sériel de donnés (133) à une fréquence sensiblement constante.
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