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Document Title |
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JPH0659045B2 |
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JPH06177829A |
PURPOSE: To provide a digital block processor having a single device which can transmit plural channels. CONSTITUTION: This digital block processor consists of a means 202 which demultiplexes plural cellular digital transmission channels...
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JPH06505377A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH06504413A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH0616612B2 |
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JPH0653937A |
PURPOSE: To simultaneously attain a digital transmission and an analog transmission by superimposing a digital modulated signal transmitted in the same frequency band on an FM modulated signal of an arbitrary transmission level. CONSTITU...
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JPH06501145A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH05336018A |
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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JPH05276132A |
PURPOSE: To increase the effective transmitting speed of a communication slot by decreasing the number of insertions of a pilot symbol, in a time-division multiple digital radio communication system in which an M-16 QAM system is used, a...
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JPH05276210A |
PURPOSE: To suppress the peak power of a transmitter in a time division multiplex digital radio communication system in which a multi-sub carrier QAM system is used and by which communication with plural slots dividing a digital signal b...
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JPH05218994A |
PURPOSE: To obtain a transmitter/transceiver system through the use of common digital and analog components by using a digital signal and its modulation and tuning hardware under time division multiplex processing. CONSTITUTION: A digita...
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JPH05504876A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH05503404A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH05136717A |
PURPOSE: To improve the TDMA frame utilizing efficiency by allowing a center station to receive a reference burst(RB) once for several frames and receiving a line connection element burst (CSC) from other frames. CONSTITUTION: The system...
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JPH0517731B2 |
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JPH0514309A |
PURPOSE: To simply and surely detect a signal by providing two filters, a comparator circuit, a decision circuit, a time protection circuit and a function for utilizing its output signal as a suppression signal and a band stop signal to ...
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JPH04357727A |
PURPOSE: To realize a signal transmission/reception system by a CATV line in which massive information is easily sent. CONSTITUTION: A time division multiplexer 1 multiplexes input digital signals of lots of channels into time division m...
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JPH04506729A |
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JPH04288732A |
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 informati...
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JPH04234236A |
PURPOSE: To quickly execute a hand-over operation by providing a system with a secondary station capable of communicating with one primary station in plural frequency division multiplex(FDM) channels (CHs) and monitoring the quality para...
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JPH04504190A |
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JPH0439813B2 |
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JPH0472831A |
PURPOSE: To use a radio frequency effectively and to simplify the station control by using selectively an idle time slot for a control radio frequency and a communication radio frequency based on each discrimination result of a control c...
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JPH0461593A |
PURPOSE: To connect an optical signal of an optional wavelength and an optional time slot to an optional outgoing line by converting an optical signal of a selected wavelength into an electric signal, moving the time slot and converting ...
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JPH03273723A |
PURPOSE: To attain the effective use of the frequency by performing the unidirectional multiplex communication at one time among plural communication terminals arranged optionally in terms of space with use of the same frequency by means...
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JPH03502751A |
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JPH0315796B2 |
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JPH0334645A |
PURPOSE: To use this system by combining time-division multiplexing with frequency division multiplexing by communicating burst information in a partial response configuration with zero energy in response to a zero value input, and recei...
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JPH0326035A |
PURPOSE: To simplify the control by sending a strobe signal at the end of one preceding transmission burst and sending a frequency division data signal just after the transmission of a strobe signal sent after the end of 2-preceding tran...
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JPH0311833A |
PURPOSE: To decrease number or local oscillation circuits and to simplify and miniaturize a changeover switch by generating a local oscillation signal used at that time till a local oscillation circuit not selected is selected next among...
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JPH031626A |
PURPOSE: To reduce the scale of an exchange by decreasing the scale of the exchange depending on the presence of a directly coupled channel and applying demultiplexing/multiplexing of a data signal of an exchange close to the destina tio...
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JPH02276323A |
PURPOSE: To evade the raising of a bit rate and to prevent the activity efficiency of a radio frequency from being lowered by performing line switching by effectively utilizing a space diversity receiver. CONSTITUTION: The switching of a...
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JPH02276325A |
PURPOSE: To execute line switching without cutting off the output signal of a channel in current use by deciding the presence/absence of a null channel with out generating the deterioration of quality by switching the frequency of the lo...
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JPH02210925A |
PURPOSE: To carry a voice, data, and video channel, and to simultaneously transmit a basic digital signal and a multiple microwave carrier wave/sub-carrier wave by providing a means for generating a light beam and a means for intensely m...
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JPH02198237A |
PURPOSE: To secure a multiplexed line with many channel numbers and to utilize effectively a frequency band width or a time division band width by providing a standard talking band width and a narrow talking band width of channels. CONST...
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JPH02122736A |
PURPOSE: To construct a system with high availability of frequency by dividing one radio channel into plural time slot systems in point of time, and performing communication by selecting one or plural time slot systems. CONSTITUTION: One...
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JPH02104042A |
PURPOSE: To attain the communication of a central station to lots of terminal stations within a prescribed time by raising a carrier having the 2nd frequency when the terminal station receives a transmission signal from the central stati...
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JPH0216069B2 |
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JPH0244829A |
PURPOSE: To reduce the call loss rate of a call which requires plural channels by selecting idle channels so that the number of the idle channels in respective time units are averaged when the new call arises. CONSTITUTION: A call contro...
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JPH0233236A |
PURPOSE: To attain effective utilization of a radio channel by selecting a time unit receptible of multiple address communication and selecting the time units in the order of maximizing receptible slave station number from the selected t...
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JPH024179B2 |
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JPH02904B2 |
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JPH0151103B2 |
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JPH01268321A |
PURPOSE: To simultaneously use two or more terminal equipments in one earth station by providing a first modulating circuit for executing a modulation output by changing a transmission frequency band, and a second demodulating circuit fo...
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JPH01208042A |
PURPOSE: To obtain compact constitution suitable for a communication satellite by performing the frequency control of a local oscillator in a period multiplied by integer times the time slot in case of transmitting a signal to a time-div...
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JPH01200841A |
PURPOSE: To lower a loss probability and to set a communication line with a high using efficiency by switching the oscillation frequency of a frequency variable type frequency oscillation when the number of oscillators which one transmit...
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JPH1194621A |
To make the values of currents flowing in the sensor coils of pickups and the exciting coils of exciters larger. A pickup holder holding the sensor coils of pickups 23, (24), 31, (32), an exciter holder holding the exciting coils of exci...
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JP01181344A |
PURPOSE: To miniaturize the transmitter of a peripheral station by devising the peripheral station such that the station transmitting a data signal and a voice signal in parallel simultaneously processes the voice signal into a burst sig...
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JPH01170199A |
PURPOSE: To efficiently use a wireless circuit by rearranging channels when prescribed conditions are satisfied in the case where a new call is generated in a multicarrier hopping TDMA system. CONSTITUTION: When the calls are generated f...
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JP01128632A |
PURPOSE: To improve communicating call quantity by allocating a channel to a call. CONSTITUTION: When data 3→4 of channels tN and f1 are changed to idle channels t2 and f2 by a channel re-arrangement control device 8 and the data of th...
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