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    • 62. 发明专利
    • Ppm signal demodulation unit
    • PPM信号解调单元
    • JP2005252740A
    • 2005-09-15
    • JP2004061515
    • 2004-03-05
    • Oki Electric Ind Co Ltd沖電気工業株式会社
    • AKAHORI HIROTSUGUSHIMAZAKI YOSHIHITO
    • H03K9/04H03M1/12H04B1/7163H04J13/00H04L25/49
    • H03K9/04H04B1/71637H04L25/4902
    • PROBLEM TO BE SOLVED: To provide a PPM signal demodulation unit, capable of demodulating a PPM signal subjected to pulse position modulation (PPM) by ultra-wideband (UWB) wireless communication.
      SOLUTION: The PPM signal demodulation unit is composed so as to include a rectification circuit 14 for rectifying the received PPM signal and converting it into an absolute value signal; integration comparators 20, 22, and 24, which integrate the absolute value signal for each of first, second, and third integration time and respectively execute the integration comparison to an integration value for each integration time; absolute value converters 42, 44, and 46 for executing the absolute value conversion into the output of the integration comparators 20, 22, and 24 respectively; moving average calculators 54, 56, and 58 for making the output of the absolute value converters 42, 44, and 46 to be subjected to the moving average respectively; a determination unit 70 for generating demodulation data, on the basis of the results of the integration comparison in the integration comparison part 22; and a control unit 40 which generates integration section control signals 32, 34, and 36 for controlling the first, second, and third integration time, on the basis of the output of the moving average calculators 54, 56, and 58 and supplies them to the integration comparators 20, 22, and 24, respectively.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种能够通过超宽带(UWB)无线通信解调经受脉冲位置调制(PPM)的PPM信号的PPM信号解调单元。 解决方案:PPM信号解调单元包括整流电路14,用于整流接收的PPM信号并将其转换为绝对值信号; 积分比较器20,22和24,其对第一,第二和第三积分时间中的每一个积分绝对值信号,并分别对每个积分时间执行积分比较与积分值; 用于分别执行绝对值转换为积分比较器20,22和24的输出的绝对值转换器42,44和46; 移动平均计算器54,56和58,用于使绝对值转换器42,44和46的输出分别受到移动平均值的影响; 基于积分比较部22的积分比较结果,生成解调数据的判定部70; 以及控制单元40,其基于移动平均计算器54,56和58的输出,生成用于控制第一,第二和第三积分时间的积分部分控制信号32,34和36,并将它们提供给 积分比较器20,22和24。 版权所有(C)2005,JPO&NCIPI
    • 68. 发明专利
    • Photodetector
    • 光电探测器
    • JPS59117338A
    • 1984-07-06
    • JP23242482
    • 1982-12-23
    • Nec Corp
    • NAKAJIMA KAZUMITSU
    • H04B10/556H04B10/11H04B10/524H04L25/49
    • H04L25/4902
    • PURPOSE:To simplify the constitution decoding a digital code by converting a difference between time intervals into a phase to detect the result, and receiving a space propagating pulse train light where the time interval of adjacent pulses is corresponded to the digital code. CONSTITUTION:Oscillating circuits 4, 5 oscillate sinusoidal wavesignals 17, 18 whose period is four times the difference of pulse time interval of a pulse train laser light 10 only for the period when rectangular wave signals 15, 16 are positive. A phase detecting circuit 6 detects the phase of the sinusoidal wave signals 17, 18, decodes a four-valued code corresponding to phase information at each time interval and generates a binary code 20 from the four-valued code obtained from each of four consecutive time intervals. A code coincidence discriminating circuit 7 compares this binary code 20 with the binary code stored in advance and when they are coincident with each other, a gate circuit 8 is opened so as to pass a main signal 12.
    • 目的:为了简化通过将时间间隔之间的差转换为相位来检测结果来解码数字码,并且接收相邻脉冲的时间间隔对应于数字码的空间传播脉冲序列光。 构成:振荡电路4,5振荡正弦波信号17,18,其周期是脉冲串激光10的脉冲时间间隔的差值的四倍,仅在矩形波信号15,16为正的时期。 相位检测电路6检测正弦波信号17,18的相位,对与每个时间间隔相对应的相位信息对四值进行解码,并根据从四个连续时间中的每一个获得的四值代码生成二进制码20 间隔。 代码重合判别电路7将该二进制代码20与预先存储的二进制代码进行比较,当它们彼此一致时,门电路8被打开以通过主信号12。
    • 69. 发明专利
    • Method for transmitting series data
    • 发送系列数据的方法
    • JPS5913450A
    • 1984-01-24
    • JP12267582
    • 1982-07-14
    • Fujitsu Ltd
    • HIRASAWA TSUTOMU
    • H03M5/08H04L25/49
    • H04L25/4902
    • PURPOSE:To transmit binary-coded electric and synchronizing signals through a single transmission line, by converting a signal string into binary signals by using a clock signal with delay time longer than the time corresponding to short pulse width. CONSTITUTION:A signal converted at its pulse width into ''0'' or ''1'' by a waveform shaping circuit 4 or 5 is transmitted to a transmission line 7 through an OR circuit 6. An inverter 8 and an AND circuit 9 on the receiving side constitute a logical differential circuit, which detects the leading end of each pulse of a signal received through the transmission line and reproduce a clock. A delay circuit 10 delays the phase of the clock by Ts/2 to form a clock signal for data sampling timing on the receiving side. A bistable multivibrator 11 is set up by the clock for data sampling timing only when the input pulse width is T1, and reproduces a signal ''1''. When the input pulse width is T0, the circuit 11 is reset and a signal ''0'' is reproduced.
    • 目的:通过单个传输线传输二进制编码电和同步信号,通过使用延迟时间比短脉冲宽度时间长的时钟信号将信号串转换成二进制信号。 构成:通过波形整形电路4或5以其脉冲宽度转换为“0”或“1”的信号通过OR电路6传输到传输线7.反相器8和AND电路9 在接收侧构成逻辑差分电路,其检测通过传输线接收的信号的每个脉冲的前端并再现时钟。 延迟电路10将时钟的相位延迟Ts / 2以形成用于接收侧的数据采样定时的时钟信号。 仅当输入脉冲宽度为T1时,双稳态多谐振荡器11由时钟设置用于数据采样定时,并再现信号“1”。 当输入脉冲宽度为T0时,电路11被复位,并且再现信号“0”。
    • 70. 发明专利
    • Data transmission system
    • 数据传输系统
    • JPS58195350A
    • 1983-11-14
    • JP7668982
    • 1982-05-10
    • Fuji Electric Co LtdFuji Facom Corp
    • IIJIMA TERUAKIKANO SHIYUNSUKE
    • H03M5/08H04L25/49
    • H04L25/4902
    • PURPOSE:To make the transmission time constant and to reduce malfunction, by making each bit of a long and a short code of a data transmission system using codes of the RZ pulse width modulation system equal with each other and transmitting consecutive short pulses by making two pulses a pair. CONSTITUTION:A long pulse is conventional in shape, but a short pulse is concaved as shown in Fig. B, and two short pulses are used as a pair. That is, in reading the pulse by using the leading edge as a start point TO, the long pulse is processed the same as in the conventional system but short pulses are sampled twice as signals S2, S3, and it is discriminated zero when the result is all L level. That is, the reading of the same timing 1, 0 is possible from the leading edge, and it is discriminated from the case when one short pulse noise is given by one. As signals S4-S7, the sampling is executed at each point of time of 1.5T and 2.5T from the leading edge as the start point TO, and it is possible to discriminate H, H as 1 and L, H as 0. The pulse used for such the case, is generated optionally by using a pulse generating circuit incorporating a timer.
    • 目的:为了使传输时间恒定并减少故障,通过使用RZ脉冲宽度调制系统的代码将数据传输系统的长码和短码的每一位相互相等,并通过使两个 一对脉冲 构成:长脉冲是常规的形状,但短脉冲是凹陷的,如图1所示。 B和两个短脉冲作为一对使用。 也就是说,在通过使用前沿作为起始点TO来读取脉冲时,长脉冲被处理与常规系统相同,但短脉冲被采样两次作为信号S2,S3,并且当结果被识别为零时 都是L级。 也就是说,可以从前沿读取相同的定时1,0,并且与一个短脉冲噪声给出的情况进行区分。 作为信号S4-S7,从作为起始点TO的前端的每个时间点1.5T和2.5T执行采样,并且可以将H,H区分为1,将L,H区分为0. 可以通过使用包含定时器的脉冲发生电路来产生用于这种情况的脉冲。