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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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JPH01128632A |
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 the tN...
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JPH0199340A |
PURPOSE: To realize the system efficiently by supplying transmission signal from a slave station terminator, frequency hopping information and burst control information to a radio transmitter-receiver of slave station in sending a data f...
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JPH0119780B2 |
A statistical multiplexer employing split band encoding in which each port has associated with it a sub-bank of filters (110F-130F) and a sub-bank of quantizers (110Q-130Q). The common equipment assigns the coding resource across all the...
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JPH0118613B2 |
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JPS6477229A |
PURPOSE: To enable bidirectional multipoint communication equivalent to a ground line by providing a multipoint adapter which operates OR among data of plural channels applied from a satellite communication equipment and applies the resu...
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JPS6411176B2 |
In this system in which the information signals to be transmitted are converted into the digital form, transmission is done via a frequency-division multiplexer which so transmit the bits of the information signals in parallel that the d...
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JPS642257B2 |
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JPS6410745A |
PURPOSE: To dispense with a complicated and expensive device by making a transmitting side transmit a frequency, corresponding to respective terminal, by time division, and making a receiving side convert a signal having passed through a...
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JPS64858B2 |
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JPS641344A |
PURPOSE: To transmit PCM sound signals and data signals, by encoding the PCM sound signals and data signals with (272, 190) codes and successively transmitting the encoded signals in a direction oblique to the encoding direction. CONSTIT...
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JPS63312737A |
PURPOSE: To eliminate an active switch and to extract a signal to a self-node by obtaining the respectively different wavelength of a burst whose transmitting destination node is different and multiplexing the burst sent from the respect...
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JPS63303507A |
The invention relates to a filter bank for frequency demultiplexing or multiplexing L channel signals, for L > 0 and L being a natural number, consisting of L transversal filters (non-recursive filters, filters with a finite duration of ...
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JPS63301700A |
A wideband/multislot switching arrangement is provided for use in a digital telecommunications exchange. A call handling device (CH) is provided which receives signalling information about a path connection, and which communicates with a...
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JPS63294144A |
PURPOSE: To reduce up-joining noises, by respectively using an FDM and TDM for an up-channel and down-channel and reproduction-repeating both of the channels by means of a collective demodulator and TDM modulator provided in a center dev...
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JPS63294145A |
PURPOSE: To improve the utilizing efficiency of a channel, by causing a host station to broadcast vacant channel information to plural slave stations at every carrier and update the broadcasting content in Round Robin form and the slave ...
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JPS6357983B2 |
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JPS6357982B2 |
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JPS63272136A |
PURPOSE: To attain the satisfactory call even at the time of a very bad cable transmission line by commanding a carrier and a time slot to be used to a time division multiplex multiple access TDMA terminal station in which an outgoing ca...
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JPS63269639A |
PURPOSE: To carry out favorable radio communication even when an interior transmission line of a radio section is used, by appropriately dividing a necessary time slot for service of the radio section and transmitting each divided time s...
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JPS63256089A |
PURPOSE:To eliminate only a DPSK signal in an excellent way by providing a BPF extracting the DPSK signal and an arithmetic circuit adding or subtracting the DPSK signal from the BPF to/from a multiplex signal between the DPSK signal and...
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JPS6351422B2 |
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JPS6351423B2 |
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JPS6347311B2 |
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JPS6347179B2 |
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JPS63206034A |
PURPOSE: To increase the transmission speed by applying frequency division to a different line and applying different combinations to plural orthogonal multi-frequency signals onto each signal in one and same line so as to make the power...
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JPS6328384B2 |
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JPS6322654B2 |
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JPS6398234A |
PURPOSE: To narrow a transmission band area and to easily perform service and management by every subscriber, by selecting an information signal by a tuner on a center A side, and transmitting the information signal of a selected baseban...
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JPS6387036A |
PURPOSE: To perform a high-speed frequency pull-in action for each burst signal by using the same number of switches, low pass filters and sample holding circuits as the number of burst signals and selecting just a single channel out of ...
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JPS6310619B2 |
To supervise the operation of an arithmetic unit of a digital transmultiplexer intended to convert a TDM-signal into a FDM-signal and vice versa, a pilot signal is utilized as the test signal which pilot signal is also used to control th...
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JPS639694B2 |
A PCM signal interface apparatus comprises a buffer memory being capable of asynchronously writing and reading a PCM signal, means for inserting a frame marker to the PCM signal upon writing the PCM signal into the buffer memory, means f...
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JPS6335025A |
A cellular digital radio transmission system which increases the number of available communication channels between base stations and mobile stations in such system. Message transmission from a base station to its assigned mobile station...
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JPS633490B2 |
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JPS632383B2 |
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JPS62292030A |
PURPOSE: To reduce the number of optical parts, and to simplify the branching and the insertion of a signal, by multiplexing the signal in a state of electrical signal, and converting a multiplex signal to an optical signal by an optical...
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JPS6248421B2 |
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JPS6259432A |
PURPOSE: To attain miniaturization and stable conversion by converting a frequency division multiplex signal into a complex number signal, applying frequency conversion and digitizing, using a chirp signal generator and a chirp filter to...
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JPS6234435A |
PURPOSE: To simplify the circuit configuration of an order circuit equipment, by changing call signals and carriers under a time sharing condition by means of switches. CONSTITUTION: By providing a transmission-side switch 2 and receptio...
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JPS6226947A |
PURPOSE: To eliminate the deterioration of quality of voice by using a data path through which a voice signal is sent at voice communication to send a control signal comprising a prescribed frequency signal thereby simplifying the consti...
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JPS6159020B2 |
PURPOSE:To perform the decision for the slave stations via the monitor control signal without installing the extra circuit to the pilot signal but by using the monitor control signal contained in the signal sent from each slave station a...
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JPS6141461B2 |
An apparatus for reducing a sampling frequency which derives information with the bandwidth fB/N (N is an integer) having a sampling frequency of 2fB/N from an input FDM signal with a bandwidth up to fB having the sampling frequency 2fB ...
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JPS61194931A |
PURPOSE: To transmit data while a data bit is added to a voice signal coded bit by superimposing a single frequency signal on a voice signal from the transmission side, coding and transmitting the result and switching the code rule corre...
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JPS619049A |
PURPOSE: To attain distribution service of a video signal, a sound signal and a digital data signal to a subscriber by applying pulse coding (PCM) to a sound signal, applying time division multiplex (TDM) and angular modulation (PSK, FSK...
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JPS619050A |
PURPOSE: To obtain a signal selection system transmitting a video signal, a sound signal and a data signal to a subscriber by applying time division multiplex to plural pieces of digital information and also applying frequency division m...
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JPS60242736A |
PURPOSE: To detect a fault where a hopping switch is interrupted or conducted by detecting respectively an input/output of the switch, using a control signal of the switch so as to compare both the detected waveforms and detecting the op...
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JPS60242737A |
PURPOSE: To detect a fault where a hopping switch is interrupted or conducted by comparing an output signal of the hopping switch with a signal fed to the said switch to output the output signal. CONSTITUTION: If no output is fed to the,...
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JPS6025932B2 |
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JPS6019376A |
The present invention relates to a technique for the Time-Frequency-Multiplexing (TFM) of three television signals. More particularly, three fields of a TV signal are sent simultaneously to a remote receiver by transmitting one field as ...
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JPS6014541A |
PURPOSE: To make a guard time unnecessary to improve the efficiency of line use by constituting a TDMA communication system so that a carrier frequency is different between adjacent time slots. CONSTITUTION: In this example, each time sl...
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