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    • 1. 发明申请
    • A METHOD FOR GENERATING A BUILT SYMBOL FOR PAPR REDUCTION AND A METHOD FOR DEMODULATING A RECEIVED SYMBOL
    • WO2015028684A3
    • 2015-03-05
    • PCT/EP2014/068630
    • 2014-09-02
    • MESTDAGH, Denis, Julien, Gilles
    • MESTDAGH, Denis, Julien, Gilles
    • H04L27/26
    • The invention concerns a method for generating a built symbol comprising a plurality of sub-symbols for transmission comprising data of an original symbol of an orthogonal multi-carrier modulation signal in order to reduce the peak-to-average power ratio (PAPR) and increase its robustness against Doppler effects of the orthogonal multi-carrier modulation signal, the original symbol lasting for a duration Ts and carried by N tones; the method comprising: by applying the intrinsic temporal diversity properties of the complex N- points Inverse Fast Fourier Transform to the original symbol, wherein the number of the generated plurality of sub-symbols is M, each of the M generated sub-symbols lasts for a duration Ts/M and is carried by N/M disjoint tones, and the M generated sub-symbols are time- multiplexed, so that the time-multiplexed built symbol contains all the data at the same rate of the original symbol. The built symbol can be demodulated by utilizing an orthogonal multi-carrier receiver. The invention also concerns a demodulation method configured for demodulating the received built symbol comprising the M sub-symbol by demodulating sequentially sub-symbol by sub-symbol, which significantly improves the robustness of the signal against Doppler effects. The invention comprises further a step of increasing the secrecy at the physical-layer of the communication system by taking all the advantages of the unique properties applied to generate the time-multiplexed built symbol for transmission.
    • 4. 发明申请
    • A METHOD FOR GENERATING A BUILT SYMBOL FOR DATA TRANSMISSION AND A METHOD FOR DEMODULATING A RECEIVED BUILT SYMBOL
    • 用于生成用于数据传输的建立符号的方法和用于解调接收到的构建符号的方法
    • WO2015028684A2
    • 2015-03-05
    • PCT/EP2014068630
    • 2014-09-02
    • MESTDAGH DENIS JULIEN GILLES
    • MESTDAGH DENIS JULIEN GILLES
    • H04L27/2615H04L27/2602H04L27/2607H04L27/2614H04L27/2627H04L27/2649
    • The invention concerns a method for generating a built symbol comprising a plurality of sub-symbols for transmission comprising data of an original symbol of an orthogonal multi-carrier modulation signal in order to reduce the peak-to-average power ratio (PAPR) and increase its robustness against Doppler effects of the orthogonal multi-carrier modulation signal, the original symbol lasting for a duration Ts and carried by N tones; the method comprising: by applying the intrinsic temporal diversity properties of the complex N-points Inverse Fast Fourier Transform to the original symbol, wherein the number of the generated plurality of sub-symbols is M, each of the M generated sub-symbols lasts for a duration Ts/M and is carried by N/M disjoint tones, and the M generated sub-symbols are time-multiplexed, so that the time-multiplexed built symbol contains all the data at the same rate of the original symbol. The built symbol can be demodulated by utilizing an orthogonal multi-carrier receiver. The invention also concerns a demodulation method configured for demodulating the received built symbol comprising the M sub-symbol by demodulating sequentially sub-symbol by sub-symbol, which significantly improves the robustness of the signal against Doppler effects. The invention comprises further a step of increasing the secrecy at the physical-layer of the communication system by taking all the advantages of the unique properties applied to generate the time-multiplexed built symbol for transmission.
    • 本发明涉及一种用于生成包括用于传输的多个子符号的内置符号的方法,包括正交多载波调制信号的原始符号的数据,以便降低峰值平均功率比(PAPR)并增大 其对正交多载波调制信号的多普勒效应的鲁棒性,原始符号持续持续时间Ts并由N个音调携带; 所述方法包括:通过将复数N点快速傅立叶变换的固有时间分集特性应用于原始符号,其中所生成的多个子符号的数量为M,M个生成的子符号中的每一个持续用于 持续时间Ts / M并且由N / M不相交音调承载,并且M个生成的子符号被时分复用,使得时间复用的内置符号包含与原始符号相同速率的所有数据。 可以通过利用正交多载波接收机来解调构建的符号。 本发明还涉及一种解调方法,其被配置为通过用子符号解码顺序的子符号来解调包含M个子符号的接收内置符号,这显着地改善了信号对多普勒效应的鲁棒性。 本发明还包括通过采用所应用的独特属性的所有优点来增加通信系统的物理层的保密性以生成用于传输的时间复用内置符号的步骤。
    • 5. 发明申请
    • LASER MICROMACHINING SYSTEM IN-LINE WITH A STAMPING PRESS
    • 激光打印机与压印机配套使用
    • WO2008070979A1
    • 2008-06-19
    • PCT/CA2007/002225
    • 2007-12-12
    • CLAIRE LASERS CORPORATIONGENDRON, Denis, Julien
    • GENDRON, Denis, Julien
    • B21C47/34B21C51/00B23K26/08B23K26/36B26F1/40
    • B21D43/022B21C47/34B23K26/0846B41M5/26
    • A first portion of a continuous material strip is indexed through a stamping press and the stamping press is cycled so as to undertake a stamping operation on a section of the material strip during each cycle. A length of the continuous strip is accumulated in an accumulator either upstream or downstream of the stamping press. A second portion of the strip is continuously fed at a non-zero speed through a laser micromachining station positioned such that the accumulator is between the stamping press and the laser micromachining station. The speed of the second portion of said strip is controlled so that this speed is constant for at least a portion of each cycle of the stamping press and so that the average speed of the first portion of said strip through the stamping press is equal to the average speed of the second portion of the strip through the laser micromachining station. A laser of the laser micromachining station irradiates the second portion of the strip while the speed of the second portion of said strip is constant. The timing of the laser processing event within the cycle of the stamping press may be such that the laser processing event occurs at a time when the ram of the stamping press is furthest away from actual material stamping event in order to avoid the deleterious effects of stamping vibration on the laser processing quality and reliability of the laser micromachining system.
    • 连续材料条的第一部分通过冲压机进行分度,并且冲压机循环,以便在每个循环期间在材料带的一部分上进行冲压操作。 连续条带的长度在冲压机的上游或下游积聚在蓄能器中。 条带的第二部分通过激光微加工站以非零速度连续进给,所述激光微机械加工站定位成使得蓄压器位于冲压机和激光微加工台之间。 所述条带的第二部分的速度被控制成使得该速度对于冲压机的每个循环的至少一部分是恒定的,并且使得通过冲压机的所述条的第一部分的平均速度等于 通过激光微加工台的条带的第二部分的平均速度。 激光微加工台的激光器照射条带的第二部分,同时所述条带的第二部分的速度恒定。 冲压机周期内的激光加工事件的定时可能是这样的:激光加工事件发生在冲压机的冲头最远离实际的冲压事件时,以避免冲压的有害影响 振动激光加工质量和激光微加工系统的可靠性。