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JP2729332B2 |
An intelligent communcations node is capable of dynamically selecting frequency and time slot assignments for communications with remote communication devices having different communication protocols including different available frequen...
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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...
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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 ...
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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...
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JPH10501930A |
A high speed bidirectional cable transmission system for CATV and other television systems includes unidirectional transmission of video signals from a head end unit to a plurality of transceivers or subscribers connected to a transmissi...
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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...
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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...
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JP2697306B2 |
A communication system having a site employing a plurality of communication channels. Each channel is assigned a desired received signal strength threshold. A channel is assigned to a subscriber unit based upon the strength of the signal...
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JP2693579B2 |
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JP2694987B2 |
Apparatus for converting a frequency division multiplex (fdm) signal to a time domain multiplex (tdm) signal in which a voltage controlled oscillator (21) whose output is a staircase of reference frequencies mixed by a mixer (20) with a ...
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JP2689567B2 |
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JP2685760B2 |
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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...
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JP2681918B2 |
PURPOSE:To avoid unpleasant noise from being heard by sending an audio signal through an FM signal system when a trouble takes place in a digital signal system so as to obtain voice by the FM signal system even if the trouble takes place...
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JP2672454B2 |
A digital block transmitter system, in a cellular/wireless radiotelephony system, generates (202) and bandshifts (207,210) a block of cellular/wireless transmit channels to a low IF by digital processing. This digital block IF signal (at...
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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...
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JP2663426B2 |
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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...
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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...
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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...
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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...
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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...
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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...
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JP2597568B2 |
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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...
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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...
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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 ...
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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...
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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 ...
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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...
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JP2577059B2 |
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JPH09501038A |
PCT No. PCT/FI95/00285 Sec. 371 Date Jan. 25, 1996 Sec. 102(e) Date Jan. 25, 1996 PCT Filed May 24, 1995 PCT Pub. No. WO95/33313 PCT Pub. Date Dec. 7, 1995A method for improving the delectability of a broadcast control channel of base in...
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JPH09501030A |
A communication system includes a plurality of subscribers each of said subscribers having a transceiver including a transmitter (34) and a receiver (35, 36). In the system there are means (31) coupled to each of said transceivers to ena...
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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...
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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...
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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...
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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....
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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...
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JP2545824B2 |
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JP2547126B2 |
PURPOSE:To efficiently apply various TDMA systems to mobile object communication. CONSTITUTION:For such a TDMA mobile object communication terminal 1 to be used by a speaker while moving, an SC processor 5 to compound control information...
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JPH08275242A |
PURPOSE: To allow a radio equipment to selectively connect a mobile equipment to plural wired channels with different channel system. CONSTITUTION: Each control signal with a radio frequency f1 (f2, f3) corresponding to plural wired chan...
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JPH08265310A |
PURPOSE: To prevent additional information from not being received due to channel switching without providing a channel dedicated for additional information by applying time division multiplex to control information in common to each cha...
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JPH08251230A |
PURPOSE: To enlarge the scale of the network system without increasing the number of wavelengths. CONSTITUTION: Nodes 101 arranged in the grid of 8×8 are divided into four groups G1-G4. Respectively different transmission wavelengths λ...
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JPH08228186A |
PURPOSE: To efficiently suppress the maximum value of signals by obtaining the amplitude of time discrete signals respectively obtained by plural inverse FFT means and selecting and transmitting discrete time signals for which the maximu...
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JP2507420B2 |
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JPH08149138A |
PURPOSE: To provide a communication circuit in which the load of a CPU caused by processing of identifier is relieved by providing the CPU receiving a selected message and applying prescribed processing to the message and forming a selec...
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JPH08149176A |
PURPOSE: To provide a demodulator whose circuit scale is not considerably increased even in the data transmission system of the multi-carrier transmission system requiring many numbers of subcarriers by providing a means conducting inter...
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JPH08130525A |
PURPOSE: To provide a frequency information transmitting equipment capable of obtaining highly accurate frequency information on a receiving side by the use of a compact circuit. CONSTITUTION: The frequency information transmitting equip...
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JPH0831830B2 |
A multiple use radio frequency (RF) transmitter comprises means (2, 8, 22) for generating a plurality of different digital information signals and means (12) for generating respective digital carrier signals for said information signals,...
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JPH08502868A |
A method and apparatus are provided of transmultiplexing a plurality of signals between a plurality of signal terminals (17 or 29) and a plurality of selected radio frequency channels. The method includes the step of, and apparatus for, ...
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