公开(公告)号：JPH01128609A

公开(公告)日：1989-05-22

申请号：JP28547887

申请日：1987-11-13

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI ,  SUZUKI HIDEO

IPC: H04B3/04 ,  H03H17/02 ,  H03H21/00 ,  H04B7/005

Abstract: PURPOSE:To miniaturize the title device and to execute a processing at a high speed by converting orthogonal two signals to pole coordinate signals, which are composed of phase information and amplitude information, and multiplying a complex coefficient, which is pole coordinate-displayed in a coefficient multiplying means, to this pole coordinate signal. CONSTITUTION:The orthogonal two signals to be Cartesian coordinate-displayed are inputted from input terminals 1a and 1b and converted to the two signals to be pole coordinate-displayed by a converting circuit 3, namely, to an amplitude signal (r) and an angle signal theta. These signals are respectively inputted to delaying terminals 10a, 10b, 10c and 10d and inputted to coefficient multipliers 4a, 4b and 4c. Then, the signals are respectively multiplied by coefficient signals 5a, 5b; 6a, 6b; 7a, 7b which are pole coordinate-displayed in the multipliers 4a, 4b and 4c. The coefficient multipliers 4a, 4b and 4c output the two signals, which are respectively pole coordinate-displayed, and these signals are cumulated by an adder 8 and outputted from output terminals 2a and 2b. Thus, circuit constitution is made simple and the processing speed is caused to be high.

公开(公告)号：JPS63283241A

公开(公告)日：1988-11-21

申请号：JP11692987

申请日：1987-05-15

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI

IPC: H04L12/28 ,  H04W68/00 ,  H04W68/10

Abstract: PURPOSE:To prevent the collision of signals between respective base station and a paging control station from being generated and to improve traffic, by sending the signal from the base station to the control station keeping an interval with each other when plural base stations receive a wave from a mobile station. CONSTITUTION:The signal is inputted to the base stations 3-5, and high frequency signals are transmitted simultaneously from the base stations 3-5. A person 7 to be called, in the case of confirming a call, allows the mobile station 8 to transmit a transmission confirmation signal by radio by depressing the switch of the mobile station 8. When the transmission confirmation signal is received at the base stations 4 and 5 simultaneously, the signals are sent from the base station 4 after 0.3ms and the base station 5 after 0.5ms. Thus, since no signals are sent onto a transmission line simultaneously, it is possible to prevent the collision from being generated.

公开(公告)号：JPS62253224A

公开(公告)日：1987-11-05

申请号：JP18650686

申请日：1986-08-08

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI

IPC: H04L7/033 ,  H03L7/10 ,  H03L7/107 ,  H04L7/02

Abstract: PURPOSE:To attain the high speed phase pull-in and to obtain a synchronizing signal with less jitter by increasing the loop gain when the difference between a frequency offset and a value stored in a memory is large, and decreasing the gain when small by the change of a coefficient. CONSTITUTION:There is a large difference between a value supplied from a loop filter 3 via an LPF 11 and the content of a memory 8 in the transient state at the initial phase pull-in, and a coefficient setting circuit increases coefficients alpha, beta by the difference, then the loop gain is increased and the quick pull-in is operated. When the synchronization is establizhed, the frequency offset is stored in a memory 8 and the output of a subtractor 15 is decreased, then the coefficients alpha, beta are decreased and the band of the loop is narrowered. Since the memory 8 stores a preceding value when the line is hit, a difference output is supplied from a subtractor 15 and the coefficients alpha, beta are increased. Thus, the quick synchronization is established.

公开(公告)号：JPS62136935A

公开(公告)日：1987-06-19

申请号：JP27754785

申请日：1985-12-10

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI ,  KUDO KYOICHI

IPC: H04N7/08 ,  H04J3/06 ,  H04L7/10 ,  H04N7/025 ,  H04N7/03 ,  H04N7/035 ,  H04N7/081 ,  H04N7/083 ,  H04N7/087 ,  H04N7/088

Abstract: PURPOSE:To attain high speed synchronization establishment by shifting the phase of a recovery clock signal by a quantity corresponding to a phase difference with a clock signal recovered from a burst signal received just before at every time a new burst signal is received. CONSTITUTION:A phase difference DELTAphid between recovery clock signals recovered from a burst signal from both stations A, B is stored in a storage circuit 7, and just after a burst signal from the station A is received, the recep tion of the burst signal from the station B is forecast or known in advance, then the phase difference DELTAphid information is read and fed to a phase shifter 4 from the storage circuit 7 just before the burst signal from the station B is received. Thus, the recovery clock signal outputted from a VCO 3 is phase- shifted by DELTAphid and the recovery clock is nearly synchronized with CBP=cos(omegaAt +DELTAphiA-DELTAphid)=cos(omegaBt+DELTAphiB'), where DELTAphiB DELTAphiB'. Thus, the synchronization of the clock recovery circuit is established in a very short time.

公开(公告)号：JPS61257021A

公开(公告)日：1986-11-14

申请号：JP9902985

申请日：1985-05-10

Applicant: TOSHIBA CORP

Inventor： SERIZAWA MUTSUMI ,  KUDO KYOICHI

IPC: H03L7/085 ,  H03L7/08 ,  H03L7/087 ,  H04L7/02 ,  H04L7/033

Abstract: PURPOSE:To obtain a phase locked circuit with excellent noise resistance by smoothing outputs of the 1st and 2nd comparators having different phase comparison characteristics and then synthesizing them so as to generate a control signal controlling a VCO. CONSTITUTION:A modulation signal subject to modulation such as phase modulation or frequency modulation is inputted to an input terminal 1 as the 1st signal. The signal 11 is given to the 1st and 2nd phase comparators 3, 4, the phase is compared with the 2nd signal 12 whose phase controlled from a voltage controlled oscillator VCO 2. The comparator 3 has a sawtooth wave phase comparison characteristic and the comparator 4 has a triangle wave phase comparison characteristic. The output signals of the comparators 3, 4 are smoothed by loop filters 5, 6 being smoothing means, a noise component is eliminated and the result is fed to a control signal generating circuit 7. The circuit 7 synthesizes output signals of the filters 5, 6 and generates a control signal 13 to control the VCO 2.

公开(公告)号：JP2003324443A

公开(公告)日：2003-11-14

申请号：JP2002127282

申请日：2002-04-26

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： MATSUO AYAKO ,  SEKINE SHUICHI ,  SERIZAWA MUTSUMI ,  SHIYOUKI HIROKI ,  TSURUMI HIROSHI ,  OBAYASHI SHUICHI ,  ADACHI TOMOKO ,  TOSHIMITSU KIYOSHI ,  AOKI TSUGUHIDE ,  SAKATA REN

IPC: H04L12/28 ,  H04L12/903 ,  H04W28/08 ,  H04W40/34 ,  H04W48/18 ,  H04W72/04 ,  H04W74/08 ,  H04W76/02 ,  H04W84/10 ,  H04W84/12 ,  H04W92/02 ,  H04L12/56 ,  H04Q7/38

CPC classification number: H04W28/08 ,  H04W48/18 ,  H04W92/02

Abstract: PROBLEM TO BE SOLVED: To provide an ad hoc network system by which a plurality of ad hoc networks are effectively utilized while preventing congestion of the networks. SOLUTION: The ad hoc network system is provided with a plurality of ad hoc networks 101 and 102 and selects an ad hoc network by deciding a communication path status based upon information on a received signal strength or the like from a radio terminal or a base station of a communicating party such that the ad hoc network of optimal communication quality and transmission velocity is selected. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种自组织网络系统，通过该自适应网络系统有效地利用多个自组织网络，同时防止网络拥塞。 解决方案：自组织网络系统设置有多个自组织网络101和102，并且通过基于来自无线终端的接收信号强度等的信息来确定通信路径状态来选择自组织网络，或者 通信方的基站，使得选择具有最佳通信质量和传输速度的自组织网络。 版权所有（C）2004，JPO

公开(公告)号：JP2003324373A

公开(公告)日：2003-11-14

申请号：JP2002128179

申请日：2002-04-30

Applicant: Toshiba Corp ,  株式会社東芝

Inventor： SEKINE SHUICHI ,  MATSUO AYAKO ,  SERIZAWA MUTSUMI ,  SHIYOUKI HIROKI ,  TSURUMI HIROSHI ,  OBAYASHI SHUICHI ,  ADACHI TOMOKO ,  TOSHIMITSU KIYOSHI ,  AOKI TSUGUHIDE ,  SAKATA REN

IPC: H04B7/08

CPC classification number: H04B7/082 ,  H04B7/0837

Abstract: PROBLEM TO BE SOLVED: To provide radio communication equipment capable of stable communication without depending upon received signal strength or the amount of information. SOLUTION: Radio set related to the present invention is provided with a first antenna 1, a detection circuit 2, a second antenna 3, a radio circuit 4 for other terminals, an evaluation circuit 5, a signal selection circuit 6, a demodulation circuit 7 and an output circuit 8. To perform the so-called switching diversity, which connects first and second terminals and selects and demodulates a radio signal from the terminal having more excellent receiving sensitivity, the internal configuration of the radio communication equipment can be simplified more in comparison with when combined diversity is performed, and the radio communication equipment can be made small and its power consumption can be reduced. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供能够稳定通信的无线通信设备，而不依赖于接收到的信号强度或信息量。 解决方案：本发明的无线电设备具有第一天线1，检测电路2，第二天线3，其他终端的无线电电路4，评估电路5，信号选择电路6， 解调电路7和输出电路8.为了执行连接第一和第二终端的所谓的切换分集，并且从具有更好的接收灵敏度的终端选择和解调无线电信号，无线电通信设备的内部配置可以是 与进行组合分集的情况相比，更为简化，可以使无线通信设备小，能够降低功耗。 版权所有（C）2004，JPO

公开(公告)号：JP2002135835A

公开(公告)日：2002-05-10

申请号：JP2001328534

申请日：2001-10-26

Applicant: TOSHIBA CORP

Inventor： WAKUTSU TAKASHI ,  NOUJIN KATSUYA ,  KAMAGATA EIJI ,  OGURA KOJI ,  KUMAKI YOSHINARI ,  SERIZAWA MUTSUMI ,  NAKAJIMA NOBUYASU

IPC: H04W16/20 ,  H04W16/24 ,  H04Q7/36 ,  H04Q7/22 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To surely receive an information service by positioning a portable electronic device in a simple configuration inside the area of high received field strength. SOLUTION: In the radio communication system of asymmetric transmission velocity, in which a down link transmission velocity for transmitting a signal from a base station to a portable electronic device 10 is higher than an up link transmission velocity for transmitting a signal from the portable electronic device 10 to the base station, a receiving area 21, where the signal transmitted from an antenna 20 of the base station becomes a sufficient received field strength capable of receiving the information service in the portable electronic device 10, is clearly shown by the color of the floor or the like to be easily discriminated and a user can easily improve the received field strength.

公开(公告)号：JP2002135203A

公开(公告)日：2002-05-10

申请号：JP2001266456

申请日：2001-09-03

Applicant: TOSHIBA CORP

Inventor： OGURA KOJI ,  MORIYA OSAMU ,  SERIZAWA MUTSUMI ,  SUGAWARA TSUTOMU ,  NOUJIN KATSUYA

IPC: H04M1/73 ,  H04B7/26 ,  H04M1/733

Abstract: PROBLEM TO BE SOLVED: To provide a power-saving radio terminal. SOLUTION: The radio terminal comprises a circuit 33 for receiving a radio transmission wave at a first transmission rate, a circuit 34 for transmitting/ receiving radio transmission waves at a second lower transmission rate, a circuit 35 for receiving a radio transmission wave at a third transmission rate lower than the second transmission rate, and a control means 32 having a function for turning on/off the power supplies of the circuit receiving a radio transmission wave at a first transmission rate and the circuit transmitting/receiving a radio transmission wave at a second transmission rate, based on the information of a signal received by the circuit receiving a radio transmission wave at a third transmission rate. In a state with the reception of a signal at first and second transmission rates being in wait, only the circuit for receiving a radio transmission wave at a third transmission rate is brought into operating state and the circuit for transmitting/receiving a radio transmission wave at the first and second transmission rates is held in a nonoperating state by turning the power off.

公开(公告)号：JPH11266483A

公开(公告)日：1999-09-28

申请号：JP6823198

申请日：1998-03-18

Applicant: TOSHIBA CORP

Inventor： SAKAMOTO TAKEFUMI ,  SERIZAWA MUTSUMI

IPC: G06F13/00 ,  H04L9/08 ,  H04W4/24 ,  H04W12/02 ,  H04W12/04 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To efficiently charge a user by transmitting ciphered information to a portable terminal equipment through a first communication means and transmitting key information for deciphering through a second communication means. SOLUTION: A portable terminal 106 which the user carries transmits an information request to a second radio base station 104, and the second base station transmits the information request to an information server 102. The information server 102 transmits information to the portable terminal 106 through a first radio base station 103 in an encryption form. The portable terminal 106 receives ciphered information to transmit a key request for deciphering to the second radio base station 104, and the second radio base station 104 receives this request to transmit it to a management server 101. If judging that the portable terminal 106 is a valid terminal, the management server 101 transmits a requested key to the portable terminal 106 through the second radio base station 104 to enable the portable terminal 106 to decipher the ciphered reception information. The management server 101 may charge the user after transmitting the key to the portable terminal.