公开(公告)号：US5790555A

公开(公告)日：1998-08-04

申请号：US663278

申请日：1996-06-07

申请人： Shoichi Narahashi ,  Ken Kumagai ,  Toshio Nojima ,  Yoshiaki Tarusawa

发明人： Shoichi Narahashi ,  Ken Kumagai ,  Toshio Nojima ,  Yoshiaki Tarusawa

IPC分类号： H03G3/30 ,  H04B1/04 ,  H04J1/00 ,  H04J1/06 ,  H04J1/16 ,  H04J1/20 ,  H04L5/06 ,  H04L27/10 ,  H04L27/12 ,  H04L27/26

CPC分类号： H04J1/06 ,  H03G3/30 ,  H03G3/3042 ,  H04J1/065 ,  H04J1/16 ,  H04J1/20 ,  H04L27/10 ,  H04L27/12 ,  H04L5/06 ,  H04L27/2621

摘要： The frequencies of input modulated signals fed via ports 11.sub.1 to 11.sub.n are converted by frequency converting parts 12.sub.1 to 12.sub.n to different bands, and the converted outputs are applied to power combining part 24 decides if 16 via variable attenuators 21.sub.1 to 21.sub.n, respectively, and provided therefrom as a multiplexed output a portion of which is branched. The envelope power level L is detected by level detecting part 23. Control with the detected level L exceeds a level L.sub.s that is k times the average power of the multiplexed signal k being about 4 to 5, and controls the attenuators 21.sub.1 to 21.sub.n to attenuate the average power of the modulated signal by k/n-fold or less for about 1/.DELTA.F.sub.0 (sec), where (.DELTA.F.sub.0 �Hz! is the frequency bandwidth of the multiplexed signal.

摘要翻译： PCT No.PCT / JP95 / 02467 Sec。 371日期1996年6月7日第 102（e）日期1996年6月7日PCT 1995年12月4日PCT PCT。 公开号WO96 / 18249 日期1996年6月13日经由端口111至11n馈送的输入调制信号的频率由频率转换部分121至12n转换为不同频带，并且转换后的输出被施加到功率合成部分24通过可变衰减器211至21n判定16 ，并作为其一部分分支的多路复用输出。 包络功率电平L由电平检测部23检测。具有检测电平L的控制超过多路复用信号k的k倍的k倍的电平Ls为约4〜5，并且控制衰减器211〜21n衰减 对于约1 / DELTA F0（sec），调制信号的平均功率为k / n倍或更小，其中（DELTA F0 [Hz]是多路复用信号的频率带宽）。

公开(公告)号：US07327996B2

公开(公告)日：2008-02-05

申请号：US10725002

申请日：2003-12-02

申请人： Ning Chen ,  Yoshiaki Tarusawa ,  Kei Satoh ,  Shoichi Narahashi ,  Noriyoshi Terada ,  Toshio Nojima

发明人： Ning Chen ,  Yoshiaki Tarusawa ,  Kei Satoh ,  Shoichi Narahashi ,  Noriyoshi Terada ,  Toshio Nojima

IPC分类号： H04B1/10

CPC分类号： H04B1/18 ,  H04B1/036

摘要： The invention relates to a high sensitivity receiver installed outdoors which may be used in a base station of a mobile communication system, for example. A received radio frequency signal is converted into a signal in a desired frequency band by a reception bandpass filter RXF3, is subject to a low noise amplification to a desired level by a low noise reception amplifier LNA4, and the amplified signal is converted into an optical signal by a laser diode LD5. RXF3, LNA4 and LD5 are confined in a heat shielding box. LD5 is cooled by cooling means to the order of critical temperature where RXF3, for example, assumes a superconducting state, whereby the dynamic range is increased and stabilized.

摘要翻译： 本发明涉及一种安装在户外的高灵敏度接收机，其可以在例如移动通信系统的基站中使用。 接收的射频信号由接收带通滤波器RXF 3转换成期望频带的信号，由低噪声接收放大器LNA4进行低噪声放大到期望的电平，并将放大的信号转换为 由激光二极管LD5的光信号。 RXF 3，LNA 4和LD 5被限制在隔热箱中。 LD 5通过冷却装置冷却至临界温度的顺序，其中RXF 3例如呈现超导状态，从而动态范围增加并稳定。

公开(公告)号：US5796307A

公开(公告)日：1998-08-18

申请号：US749240

申请日：1996-11-14

申请人： Ken Kumagai ,  Toshio Nojima ,  Shoichi Narahashi

发明人： Ken Kumagai ,  Toshio Nojima ,  Shoichi Narahashi

IPC分类号： H03F1/32 ,  H03F1/26

CPC分类号： H03F1/3229 ,  H03F1/3241

摘要： An input signal is applied to a first phase shifter whose phase shift amount-vs.frequency characteristic is a square-law characteristic, then the output from the first phase shifter is amplified by an amplifier, and the amplified output is applied to a second phase shifter which has a phase shift amount-vs.-frequency characteristic that is substantially inverse to that of the first phase shifter, thereby obtaining an amplified output signal from the second phase shifter.

摘要翻译： 输入信号被施加到相移量 - 频率特性是平方律特性的第一移相器，然后由放大器放大来自第一移相器的输出，并且将放大的输出施加到第二相位 移相器具有与第一移相器基本上相反的相移量 - 频率特性，从而获得来自第二移相器的放大的输出信号。

公开(公告)号：US5812296A

公开(公告)日：1998-09-22

申请号：US776925

申请日：1997-02-11

申请人： Yoshiaki Tarusawa ,  Toshio Nojima ,  Yasushi Ito

发明人： Yoshiaki Tarusawa ,  Toshio Nojima ,  Yasushi Ito

IPC分类号： H04B10/077 ,  H04B10/079 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/2575 ,  H04B10/54 ,  H04B10/572 ,  H04B10/12

CPC分类号： H04B10/278 ,  H04B10/25753 ,  H04B10/27

摘要： In a fiber optics transmission system in which a plurality of access units are cascade-connected via up-link and down-link optical fiber lines and connected to a base unit, the base unit has a beat noise detector and a noise information generator and, upon detection of beat noise, noise information is sent to each access unit over the optical fiber lines. Each access unit has a random signal generator for generating a random value in response to the noise information and a wavelength control circuit for randomly selecting and controlling the oscillation wavelength of a laser diode, and each access unit repeats random wavelength selection until the noise information is reduced.

摘要翻译： PCT No.PCT / JP96 / 02340 Sec。 371日期1997年2月11日 102（e）日期1997年2月11日PCT提交1996年8月22日PCT公布。 出版物WO97 / 08856 日期1997年3月6日在其中多个存取单元通过上链路和下行链路光纤线路级联连接并连接到基本单元的光纤传输系统中，基本单元具有拍频噪声检测器和 噪声信息发生器，并且在检测到节拍噪声时，通过光纤线路将噪声信息发送到每个存取单元。 每个访问单元具有随机信号发生器，用于响应于噪声信息产生随机值，以及用于随机选择和控制激光二极管的振荡波长的波长控制电路，并且每个存取单元重复随机波长选择，直到噪声信息为 减少

公开(公告)号：US5302908A

公开(公告)日：1994-04-12

申请号：US995163

申请日：1992-12-22

申请人： Yoshiaki Tarusawa ,  Toshio Nojima ,  Kazuaki Murota

发明人： Yoshiaki Tarusawa ,  Toshio Nojima ,  Kazuaki Murota

IPC分类号： H03K5/26 ,  G01R25/08 ,  H03D13/00 ,  H03L7/091 ,  H03L7/183 ,  H03K9/06

CPC分类号： G01R25/08 ,  H03D13/001 ,  H03L7/091 ,  H03L7/183

摘要： A modulus counter counts first clock pulses to modulus M and outputs the count value as an m-bit reference signal, M being an integer. A latch circuit samples and holds the reference signal in response to a trigger signal generated by a trigger signal generator in synchronism with an input signal. A high-speed counter is supplied with second clock pulses of a frequency higher than that of the first clock pulses and starts counting the second clock pulses in response to the trigger signal and stops the counting in response to a first one of the first clock pulses immediately thereafter. A data processor converts the n-bit count value of the high-speed counter to n-bit data corresponding to a phase fraction of a phase quantization step in the latch, combines the n-bit data as low-order bits with m-bit data from the latch and outputs the combined data as phase difference data.

摘要翻译： 模数计数器将第一个时钟脉冲计数为模数M，并将该计数值作为m位参考信号输出，M为整数。 锁存电路响应于与输入信号同步的触发信号发生器产生的触发信号，采样并保持参考信号。 向高速计数器提供频率高于第一时钟脉冲的第二时钟脉冲，并响应于触发信号开始对第二时钟脉冲进行计数，并响应于第一时钟脉冲中的第一时钟脉冲停止计数 此后立即。 数据处理器将高速计数器的n位计数值转换为对应于锁存器中的相位量化步长的相位分数的n位数据，将n位数据组合为低位位与m位 来自锁存器的数据作为相位差数据输出。

公开(公告)号：US4980652A

公开(公告)日：1990-12-25

申请号：US400665

申请日：1989-08-31

申请人： Yoshiaki Tarusawa ,  Shigeki Saito ,  Yasushi Yamao ,  Toshio Nojima

发明人： Yoshiaki Tarusawa ,  Shigeki Saito ,  Yasushi Yamao ,  Toshio Nojima

IPC分类号： H03L7/14 ,  H03L7/189 ,  H03L7/199

CPC分类号： H03L7/189 ,  H03L7/14 ,  H03L7/199 ,  H03L2207/05

摘要： In a phase locked loop frequency synthesizer, the frequency of a VCO is switched by changing the division ratio of a variable ratio frequency divider in the feedback path of the loop. At the time of switching, a prepositioning voltage is applied to the VCO to realize fast frequency switching. To correct for nonlinear response of the VCO, the prepositioning voltage is adjusted according to information received from a voltage measuring circuit connected to the VCO control circuit.

公开(公告)号：US5231632A

公开(公告)日：1993-07-27

申请号：US617369

申请日：1990-11-23

申请人： Yasushi Yamao ,  Yoshiaki Tarusawa ,  Toshio Nojima

发明人： Yasushi Yamao ,  Yoshiaki Tarusawa ,  Toshio Nojima

IPC分类号： H04W36/08 ,  H04W36/18

CPC分类号： H04W88/02 ,  H04W36/18

摘要： In radio communication equipment for use in a mobile station, provision is made for selectively applying either one of the oscillation outputs of first and second local oscillators to a transmitting part and a receiving part by first and second RF switches, respectively. In a traffic channel hand-off system for a mobile communication system in which each time the mobile station moves from a certain zone to another, its traffic channel is switched to another traffic channel of a different frequency, a control part responds to a traffic channel assigning signal from the current base station to allot an idle one of the local oscillators to the assigned channel, set the allotted local oscillator to an oscillation frequency corresponding to the assigned channel, and control the second RF switch, in an idle time of the receiving part in the current communication, to set the receiving part to the assigned channel for receiving a down link hand-off preparatory signal from a new base station. Further, the control part controls the first RF switch, in an idle time of the transmitting part in the current communication, to set the transmitting part to the assigned channel for transmitting an up link hand-off preparatory signal to the new base station. These preparatory procedures are followed by controlling the first and second RF switches to supply the oscillation output of the allotted local oscillator to the transmitting part and the receiving part, thereby completing the traffic channel hand-off without momentarily interrupting the communication.

公开(公告)号：US06963758B2

公开(公告)日：2005-11-08

申请号：US10130278

申请日：2001-10-01

申请人： Shoichi Narahashi ,  Kunihiro Kawai ,  Kei Satoh ,  Toshio Nojima

发明人： Shoichi Narahashi ,  Kunihiro Kawai ,  Kei Satoh ,  Toshio Nojima

IPC分类号： H04B1/036 ,  H04B1/18 ,  H04B7/04 ,  H04M1/00 ,  H04B7/00

CPC分类号： H04B1/18 ,  H04B1/036 ,  H04B7/0491

摘要： In a high sensitive radio receiver system for a diversity reception from two antennae per each of three sectors (SC1, SC3, SC3), a series connection of a bandpass filter (31 to 36) and a low noise amplifier (41 to 46) is contained in each of a plurality of vacuum chambers (81 to 86), the interior of which is cooled by a distinct, separate cooling unit (91 to 96). The two antennae per sector are connected to bandpass filters contained in different vacuum chambers.

摘要翻译： 在用于从三个扇区（SC 1，SC 3，SC 3）中的每一个的两个天线进行分集接收的高灵敏度无线电接收机系统中，带通滤波器（3 <1> 3 <3> 并且在多个真空室（8L1）中的每一个中包含低噪声放大器（4 <1> 4 <6>） ），其内部由不同的分开的冷却单元（9＆gt;至9＆lt; 6＆gt;）冷却， 。 每个扇区的两个天线连接到包含在不同真空室中的带通滤波器。

公开(公告)号：US06480706B1

公开(公告)日：2002-11-12

申请号：US09466062

申请日：1999-12-17

申请人： Tetsuya Mimura ,  Kei Satoh ,  Shoichi Narahashi ,  Toshio Nojima

发明人： Tetsuya Mimura ,  Kei Satoh ,  Shoichi Narahashi ,  Toshio Nojima

IPC分类号： H04Q1112

CPC分类号： H01Q3/36 ,  H01Q1/364 ,  H04B1/036 ,  H04B1/18 ,  H04B7/084

摘要： A receiver directs the center of the main beam of the antenna directivity response in a desired direction by passing signals received by n antenna elements 1a to 1d through a phase shifter 3. An output from the phase shifter 3 is passed through a receiving filter 5 and is then amplified by a low noise amplifier 6 to be delivered as an output. The phase shifter 3 is confined together with the receiving filter 5 and the amplifier 6 in a cryostat 8, and the phase shifter 3 as well as the receiving filter 5 and the amplifier 6 are cooled down by cooling means 9 through a cold stage 9a, whereby the thermal noises generated therein are reduced to a minimum.

摘要翻译： 接收器通过将n个天线元件1a至1d接收的信号通过移相器3，将天线方向性响应的主波束的中心在期望的方向上引导。来自移相器3的输出通过接收滤波器5和 然后被低噪声放大器6放大，作为输出被输送。 移相器3与低频恒温器8中的接收滤波器5和放大器6一起被限制，并且移相器3以及接收滤波器5和放大器6通过冷却装置9通过冷级9a冷却， 由此其中产生的热噪声减小到最小。

公开(公告)号：US06208204B1

公开(公告)日：2001-03-27

申请号：US09460707

申请日：1999-12-14

申请人： Yasunori Suzuki ,  Toshio Nojima ,  Shoichi Narahashi

发明人： Yasunori Suzuki ,  Toshio Nojima ,  Shoichi Narahashi

IPC分类号： H03F366

CPC分类号： H03F1/3229

摘要： In the balance adjustment using a pilot signal in a distortion detector and a distortion canceller of a feed-forward amplifier for amplifying a CDMA transmission signal, a pilot code is spread by a long code different from that of the CDMA transmission signal to obtain the pilot signal. The pilot signal is converted to a signal of the transmission frequency band, and the converted signal is injected into the transmission signal at the input side of the amplifier. The pilot signal frequency band is detected from the output of an auxiliary amplifier of the distortion canceller and converted to the base band, thereafter being despread to detect the pilot signal (code).

摘要翻译： 在使用失真检测器中的导频信号的平衡调整和用于放大CDMA发送信号的前馈放大器的失真消除器的情况下，导频码以与CDMA发送信号不同的长码进行扩频，以获得导频 信号。 将导频信号转换为发送频带的信号，并将转换的信号注入放大器的输入侧的发送信号。 从失真消除器的辅助放大器的输出检测导频信号频带，并将其转换为基带，之后被解扩以检测导频信号（代码）。