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31. 发明专利

JP2000261446A RADIO COMMUNICATION DEVICE 失效
公开(公告)号：JP2000261446A
公开(公告)日：2000-09-22
申请号：JP5843999
申请日：1999-03-05
申请人： CANON KK
发明人： AKEBOSHI TOSHIHIKO
IPC分类号： H04B1/54 , H04L12/28
摘要： PROBLEM TO BE SOLVED: To easily prevent sending of disturbing interference wave at the time of communicating with a hidden terminal by providing the radio communication device with an interruption means for interrupting sending operation similarly to the detection of a carrier when a communication state signal inputted by an input means is a value indicating the execution of communication. SOLUTION: This radio communication device starting transmitting operation monitors a communication state signal (an output from an OR circuit 207) 208 obtained by finding out OR between a carrier detection signal and a reception display input signal 204. When an antenna 201 of its own station receives a radio wave exceeding a carrier sensing level or an adjacent radio station is in a receiving state, the communication state signal 208 outputted from the OR circuit 207 is turned to a high level, the execution of communication is detected and the transmitting operation is interrupted. In the constitution, radio communication devices arranged adjacent positions exerting interference on each other can prevent the sending of interference waves at the time of receiving data from a party which can not be detected without changing a radio control protocol.

32. 发明专利

JP2000509221A 失效
公开(公告)号：JP2000509221A
公开(公告)日：2000-07-18
申请号：JP53816197
申请日：1997-04-17
IPC分类号： H04B1/54 , H03L3/00 , H03L7/107 , H04B1/04 , H04J1/06

33. 发明专利

JPH11289292A DIGITAL TRANSMITTER-RECEIVER 失效
公开(公告)号：JPH11289292A
公开(公告)日：1999-10-19
申请号：JP10542198
申请日：1998-03-31
申请人： KYOCERA CORP
发明人： UCHIYAMA TETSUOMI
IPC分类号： H04B1/54 , H04B7/26 , H04J3/00
摘要： PROBLEM TO BE SOLVED: To realize frequency correction with high accuracy regardlessly of a radio wave state by applying correction processing to a received frequency based on a received frequency deviation value only when received data is normal and the received frequency deviation values are continuously almost the same by only prescribed times. SOLUTION: The data such as a counter (z) and deviation data x1 to x10 and constant values are initialized. When a unique work(UW) detector inputs receiving data by a receiving burst interruption, the UW is checked, and when it is normal, then the existence of a bit error is checked from CRC data. When there is no errors, the frequency deviation values x1 to x10 of frequency offset information that is outputted from a frequency correcting device are calculated. If the deviation values of the preceding time and this time are almost equal, they are adopted to update the counter (z), if they differ from each other drastically, the counter (z) is cleared and the deviation values are discarded. When all of the data x1 to x10 are collected, they are averaged, a frequency offset set value is set so as to reduce deviation value and is outputted to the frequency correcting device and the counter (z) is cleared.

34. 发明专利

JPH11196022A TWO-WAY TRANSMITTER-RECEIVER 失效
公开(公告)号：JPH11196022A
公开(公告)日：1999-07-21
申请号：JP35975397
申请日：1997-12-26
申请人： SANYO ELECTRIC CO
发明人： HORIKOSHI MASARU , UCHIYAMA HISAYOSHI
IPC分类号： H04B1/54 , H04B1/69 , H04B1/7073 , H04L5/16
摘要： PROBLEM TO BE SOLVED: To provide a transmitter-receiver of a spectrum diffusion type capable of surely receiving data with any timing in an intermittent reception mode. SOLUTION: In an intermittent reception mode, the data waiting period of a first transmitter-receiver 1 is set three times as long as that set in an initial synchronous mode secured between the transmitter-receiver 1 and a second transmitter-receiver 23. As a result, a piece of transmitting data is always secured, when the transmitting data are sent from the transmitter-receiver 1 in a data waiting period. Thus, the transmitting data can be surely received.

35. 发明专利

JPH10200443A INTERRUPT COMMUNICATION CONTROLLER 失效
公开(公告)号：JPH10200443A
公开(公告)日：1998-07-31
申请号：JP4097
申请日：1997-01-06
申请人： NEC CORP
发明人： OGAWA MASAYOSHI
IPC分类号： H04B1/54
摘要： PROBLEM TO BE SOLVED: To prevent the head of conversation from being cut at the time of resuming transmission and to sufficiently secure the natural communication. SOLUTION: This interrupt communication controller is provided with a transmission signal detecting part 11 which detects no signal state of a transmission signal SA and outputs a transmission detection signal SE at the time of a transmission control operation, an interrupt signal detection control part 22 which forcedly makes a receiving state only for a forced receiving control time t1 based on the signal SE and also continues a forced receiving state when an interrupt signal that shows interrupt from other stations is detected from a receiving signal that is received within the time t1 , a delay comparative control part 23 which detects time difference between the time t1 and the time when the signal SE is on a 'high' level, delays the signal SA after transmission resume by the time difference to output when the time at which the signal SE is on the 'high' level is shorter than the time t1 and outputs a transmitting signal after the transmitting resume as it is when it is longer than the time t1 and a variable delay control part 21.

36. 发明专利

JPH1093476A TRANSMITTER AND RECEIVER FOR RADIO COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH1093476A
公开(公告)日：1998-04-10
申请号：JP24647096
申请日：1996-09-18
申请人： CASIO COMPUTER CO LTD
发明人： MIYAZAKI YOSHITO , KAWANAKA KENJI
IPC分类号： H04B1/54 , H04J3/00
摘要： PROBLEM TO BE SOLVED: To provide a transmitter/receiver capable of reducing power consumption and suitable for a portable radio communication terminal by supplying a receiving local signal to a frequency converting means and a transmitting local signal to a modulation means by synchronizing by every slot. SOLUTION: Base band signals I, Q are supplied to a quadrature modulator 75 and the signal is inputted from a VCO 77 of a first local signal generating circuit part via a fourth switch 79. The local signal or a second transmitting local signal inputted from a VCO 81 is modulated, a modulation wave component of an obtained modulation signal is removed by an SAWBPF 66 and the modulation signal of a carrier wave frequency band is extracted. An output of the BPF 66 is amplified at a prescribed amplification factor via a switch 65 by a high power amplifier 74, after that its modulation wave component is removed via an antenna switch 63 by an SAWBPF 62 and transmitted as a radio signal from an antenna 61. In this way, the transmitter/receiver is miniaturized by suppressing a circuit configuration required for a local signal generating means.

37. 发明专利

JPH1023498A RADIO BASE STATION, SUBSCRIBER'S EQUIPMENT AND OPERATING METHOD IN WLL SYSTEM UTILIZING PHS 失效
公开(公告)号：JPH1023498A
公开(公告)日：1998-01-23
申请号：JP16970096
申请日：1996-06-28
申请人： FUJITSU LTD
发明人： YAJIMA YASUO , MASHIMA RIKIHIKO , YAMASHITA ATSUSHI , SOGO HIROYUKI , SETA MITSURU , ISHIKAWA HITOSHI , KUBO TSUDOI , SHIROTA MASAHIKO , HAMADA YUTAKA
IPC分类号： H04Q7/22 , H04B1/54 , H04Q7/24 , H04Q7/26 , H04Q7/30 , H04Q11/04
摘要： PROBLEM TO BE SOLVED: To extend a service area in spite of a small size, easily backing up against a fault and maintaining a transmission quality and reliability high by constituting of plural cell stations and a hybrid section dealing with a signal transmitted and received by the plural cell stations by integrating between with a single antenna. SOLUTION: The hybrid section 10 is arranged between plural cell stations 4 and two transmission and reception antennas 7. Plural power combining devices 11 combines each transmitted power from the plural cell stations 4 to supply one of the antennas 7. Plural power distributors 12 distribute received power received from one of the antennas 7 to the plural cell stations 4. An SD switch 14 combines each transmitted power toward one of the antennas 7. A TDD switch 13 switches one of the antennas for transmission or reception based on a TDD system.

38. 发明专利

JPH09219664A RADIO TRANSMITTER-RECEIVER 失效
公开(公告)号：JPH09219664A
公开(公告)日：1997-08-19
申请号：JP2377896
申请日：1996-02-09
申请人： NEC CORP
发明人： MARUYAMA SHUSUKE
IPC分类号： H04B1/26 , H04B1/40 , H04B1/54
摘要： PROBLEM TO BE SOLVED: To make a transmitter-receiver small, to minimize interference in an internal circuit even when a simplified shield is employed and to minimize the number of oscillators by adopting a single frequency conversion system for the transmitter side and a double frequency conversion system for the receiver side. SOLUTION: A local frequency for transmission/reception 1st frequency conversion is generated by using a common oscillator 4 whose oscillated frequency is f1. A reception 2nd local frequency signal and a transmission intermediate frequency signal are generated respectively from independent oscillators 7, 13 whose oscillated frequencies are respectively 2f2, 2f3. The oscillators generates frequencies twice those of a conventional transmitter-receiver and the oscillated frequencies are fed to a receiver side 2nd frequency converter 6 and transmitter side intermediate frequency converters 12(1), 12(2) while being frequency-divided to 1/2 by frequency dividers 8, 14 respectively. Output signals from the two oscillators are mixed by a frequency converter 11 and frequency-divided to 1/2 by a frequency divider 10 and then a base band signal [2f2+2f3]/2 is generated. Through the constitution above, the operation of a frequency divider 14 for the transmission intermediate frequency signal is stopped during reception.

39. 发明专利

JPH09162775A RADIO EQUIPMENT SAME IN TRANSMISSION FREQUENCY AND RECEPTION FREQUENCY 失效
公开(公告)号：JPH09162775A
公开(公告)日：1997-06-20
申请号：JP31646595
申请日：1995-12-05
申请人： FUJITSU LTD
发明人： WATANABE YASUNOBU , OIDE TAKAYOSHI , SUGANO HIROTOSHI
IPC分类号： H04B1/54 , H04B1/04
摘要： PROBLEM TO BE SOLVED: To decrease the switching interval of transmission and reception in the radio equipment using the same frequency for the transmission and reception and to prevent spurious radiation in a transmission signal based on a delay of an operation stop of a local oscillator at a reception section side in the case of changeover from the reception state into the transmission state. SOLUTION: In a power supply voltage application section 1 supplying power to a receiver side local oscillator 3 in the radio equipment using the same frequency for transmission and reception, a high speed switching element transistor(TR) is connected across a power capacitor C inserted to a power supply voltage path and being a component of a power noise reduction filter and whose one terminal connects to ground. Then the on/off of the high speed switching element TR is controlled by an on/off control signal controlling on/off of the local oscillator 3 to stops an output of the local oscillator 3 quickly when the local oscillator 3 is turned off.

40. 发明专利

JPH09121216A RADIO COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH09121216A
公开(公告)日：1997-05-06
申请号：JP29890695
申请日：1995-10-24
申请人： RICOH KK
发明人： OTA NAOKI
IPC分类号： G06F3/12 , H04B1/38 , H04B1/3822 , H04B1/54 , H04L12/28 , H04W72/12 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To effectively use a base station by plural mobile stations by interrupting communication for a certain time to enable the base station to receive a link request from another mobile station even in the case of a single slot between radio communication equipments. SOLUTION: Mobile stations 1 and 2 are provided with terminals 4 and 5, and a base station 3 is provided with a printer 6, and two-way communication is possible. Mobile stations 1 and 2 interrupt the communication for a certain time after communication for the certain time and latch the link requests to continuously transmit them to the base station 3 in receiving print requests from terminals. The base station 3 manages the link requests by a management table and transmits response signals to received link requests to mobile stations from the management table in the link request reception order at the end of communication. When a mobile station is communicating with the base station, the latched link request from the other mobile station is stored in a buffer 9 by the base station 3 when communication is interrupted for a certain time, and communication with the mobile station whose link request is first stored is started after the end of communication.

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