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Patent Searching and Data


Matches 451 - 500 out of 803

Document Document Title
JPH1075224A
To increase the number of transmission channels without enlarging a time slot number per frame by switching a carrier frequency for each frame and terminating the changeover of a frequency if a halt judgement reference is satisfied. The ...  
JPH1066039A
To attain reception processing with a simple configuration in the case that a plurality of sources of television broadcast programs are sent simultaneously efficiently. A plurality of transmission bands to each of which a prescribed numb...  
JPH1066051A
To conduct smoothly toll charged data communication service using a CATV channel. A transmission packet from a personal computer 13 is converted into a transmission packet for a CATV channel by a data converter and sent to a cable modem ...  
JP2715873B2
PURPOSE: To miniaturize a transmitter/receiver and to reduce cost by preventing the increase of the peak factor of a transmission carrier due to the centralization of synchronizing symbols having the maximum amplitude shift amount of eac...  
JPH10501930A
(57) The high-speed both-directions cable transmission system for summary CATV and other television systems carries out the single direction transmission of the picture signal from a head end unit (10), two or more transceivers, i. E. , ...  
JPH10501397A
(57) In a summary TDM/TDMA portable radio communications system, a portable handset, The operation in the frequency division Dupleix (FDD) mode to the portion licensed to I frequency band in new technology, the time sharing Dupleix (TDD)...  
JPH1028086A
To perform high-speed data transfer with PHS data communication equipment by using a circuit element (LSI) for a low communication speed and, at the same time, to reduce the cost of the communication equipment by reducing the data errors...  
JPH1022972A
To provide a radio communication system allowing each slave set accompanying a master set and plural external communication lines to communicate with each other with less effect of interference radio waves. The master set 10 is connected...  
JPH1022852A
To set a frequency channel at a very small frequency step by setting a transmission channel at the frequency step equal to a difference between a 1st step frequency and a 2nd step frequency. A frequency is set not by one frequency signal...  
JP2697306B2  
JP2693579B2  
JP2694987B2  
JP2689567B2  
JP2685760B2  
JPH09307599A
To surely attain automatic identification of a transmission mode by delaying a base band signal by different delay times depending on a plurality of transmission modes and calculating a correlation between the base band signal and each d...  
JPH09307875A
To provide the multiplex transmission method in which not fixed channel arrangement but dynamic channel arrangement is attained and management of a flexible channel and band is facilitated. In the multiplex transmission method, a modulat...  
JP2681918B2  
JP2672454B2  
JPH09289500A
To increase the number of time slots used for communication without increasing the number of transmission/reception processing parts and also to attain the fast transmission of data by performing both transmission and reception via the s...  
JPH09284242A
To provide a communication equipment with a small scale whose band width is variable in the frequency division multiplex communication. In a multiplexer at a transmitter side, an A/D converter 3 converts each channel signal into a digita...  
JP2663426B2  
JPH09247121A
To increase transmission rate without changing frequency band width. The intermediate frequency outputs of n-number reception systems are digitally wave detection-processed by wave detecting means 171-17n so as to obtain digitized baseba...  
JPH09215049A
To improve the channel quality by using two output signals from a signal detector and a unique word detector so as to learn distribution of interference noise of each channel and using a channel with less interference with priority. A tr...  
JPH09215051A
To provide a base station for mobile object communication system with which the increase of cost is suppressed in a simple configuration and much more simultaneous connecting processes can be performed while keeping communication quality...  
JPH09200854A
To send effectively non-voice data without interrupting voice communication during execution. In the case of making additional information communication, a multiplex communication mobile station 100 uses a voice CODEC section 103 transmi...  
JPH09200164A
To simply configure a filter group with a different pass band with a small hardware amount by converting a received frequency division multiplex signal into a time division multiplex signal, reproducing the signal into a frequency divisi...  
JPH09172427A
To improve the quality of fast data transmission under multi-path phasing. In an equipment on the side of a base station 1 and the equipment on the side of a mobile station 21 using a TDD(time division duplex) system, a serial/parallel c...  
JPH09162838A
To conduct switching of an oscillation circuit at time slot switching in a short time in a mobile radio system employing time division multiplexing. A switch 15 is used to change over a transmission circuit 16/a reception circuit 17 and ...  
JPH09153879A
To multiplex other signals with an ISDN signal and a digital-only signal and to use a CATV network. The ISDN signal and the digital-only line signal of a subscriber line transmission system are time-divisionally multiplexed and sub-carri...  
JPH09153880A
To simplify configuration by sharing a reception converter and a transmission D/A converter in a time division manner, which correspond to the respective analog and digital modes. In receiving, an inputted orthogonal phase modulating sig...  
JPH09121200A
To operate a communication system efficiently by allocating dynamically the user of the communication system to a communication channel. The frequency division multiplexer and the modulator (DRFDM2) 40 re-configured dynamically receive p...  
JPH09107580A
To set a time slot interval in response to a frequency switching capability by providing a time slot interval between adjacent radio channels in a TDMA(time division multiplex access) frame. Let a length of an i-th time slot in a TDMA fr...  
JP2597568B2  
JPH0983472A
To provide a synthesizer reducing the frequency changeover of the frequency hopping radio equipment. The synthesizer is provided with a D/A converter 2 operated in a switching timing based on a switching pattern of a prescribed frequency...  
JP2595166B2
PURPOSE: To reduce a call loss rate by measuring the total number of operating channels of a station onto which traffic is concentrated, selecting an idle channel in the order of a time slot for the higher number and allocating a call ca...  
JP2591877B2
PURPOSE: To reduce a all loss rate of a high speed call in the multi-carrier hopping TDMA communication system. CONSTITUTION: When a call takes place, the system selects to the extent possible an idle channel so as not to select an idle ...  
JPH0974366A
To receive and demodulate the broadcast of different modulation systems in a single reception and demodulation means. Reception signals received by an antenna 14 are mixed with output from a local oscillator 19 and the output phase-conve...  
JPH0974363A
To simplify the circuit of the AFC of a multicarrier modulation receiver by respectively independently obtaining the frequency deviation of local oscillation signals and multiplex signals from a demodulation means from the level of data ...  
JPH09502844A
PCT No. PCT/GB94/01976 Sec. 371 Date Jan. 26, 1996 Sec. 102(e) Date Jan. 26, 1996 PCT Filed Sep. 12, 1994 PCT Pub. No. WO95/08247 PCT Pub. Date Mar. 23, 1995An optical communications system comprises an inner core network, a plurality of...  
JP2577059B2  
JPH09501038A
(57) Summary book invention about the way a transceiver unit improves the audibility of the information channel of the base station (from BTS1 to BTS3) of the wireless system divided into the channel in the principle of a time sharing mu...  
JPH09501030A
(57) Each member a summary communications system including two or more members with the transmitter-receiver containing a transmitter (34) and a receiver (35, 36) in a system, It is combined with each above-mentioned transmitter-receiver...  
JPH0918441A
To prevent the use efficiency of a line from lowering and to efficiently perform the transmission of a discontinuous enabling signal by sharing a control line with the one for the discontinuous enabling signal when the number of times of...  
JPH0918440A
PURPOSE: To improve the use efficiency of a channel and to efficiently operate a communication system by preventing use channels from concentrating on a high transmission power base station in a communication system of umbrella cell stru...  
JPH09500512A
(-- 57) summary -- the radio access method for promoting communication between 1st at least one game and two or more 2nd game is indicated. In the 1st game, each signal of transmission is buffer-ized first. Next, these signals are divide...  
JPH099246A
PURPOSE: To improve the utilization efficiency of communication channels by making communication possible even when the carrier waves of either one of an outgoing communication channel using the carrier waves for outgoing communication a...  
JPH08321826A
PURPOSE: To avoid reflection, to prolong distance and to realize high speed digital transmission by forming specified pair lines which is composed of branch lines into a pair lines by means of a branch line branching filter and connectin...  
JPH08322037A
PURPOSE: To provide a radio moving image/voice transmitter capable of reducing an error by performing the bidirectional transmission/reception of a moving image and a voice simultaneously and applying error correction processing to them....  
JPH08316873A
PURPOSE: To simplify the circuit configuration by decreasing number of oscillators in the time division multiplex FDD radio equipment and the time division multiplex FDD/TDD dual mode radio equipment. CONSTITUTION: A converter 6 mixes a ...  
JPH08289353A
PURPOSE: To reduce the degradation of the service quality by switching the control channel, where a fault occurs, to an unused channel and switching it to a disconnected channel after previous notice of disconnection and automatic reconn...  

Matches 451 - 500 out of 803