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Matches 351 - 400 out of 805

Document Document Title
JP2003244756A
To provide a wireless communication system capable of enhancing the frequency utilizing efficiency through the utilization of the FDMA/TDMA and assigning a time slot with a different length depending on an information signal to a destina...  
JP3393954B2
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 ...  
JP3391291B2
To facilitate a routing operation in an optical wave network and to realize a high speed transfer processing by permitting an optical wave access network to convert the user packet of a terminated layer into the light wave adaptation lay...  
JP2003510972A
The invention concerns a method for transmitting a biorthogonal multicarrier signal BFDM/OM, using a transmultiplexer structure providing: a modulating step, using a synthesis filter bank (11), having two 2M parallel branches, M>=2, each...  
JP3359002B2
To attain power saving in the case of controlling transmission power while keeping isolation of an output circuit. In the case of conducting transmission from an antenna 1 under a condition of 900 MHz, 2 Watts in compliance with the glob...  
JP2002539671A
(57) Especially summary book invention relates to the data transmission in the microwave link system which lets point pair multipoint connection pass. The construct by the present invention uses frequency division and time sharing duplex...  
JP3329821B2
A radio access method for facilitating communication between at least one first station and a plurality of second stations is disclosed. First, each signal intended for transmission is buffered at a first station. The signals are then di...  
JP3306760B2
PURPOSE: To provide demultiplexing circuit which can be applied to the variation of traffic derived from changes of both the number of channels and the band width and utilizes a polyphase network. CONSTITUTION: Frequency multiplexed carr...  
JP2002204483A
To provide a subscriber RF telephone system that uses FDMA/TDMA to enhance the frequency utilizing efficiency.Using wireless digital time division multiplex transmission circuits between a base station and a plurality of fixed or mobile ...  
JP3258615B2
To perform plural communications that have different routes by switching to communication that uses a 2nd communication frame in response to a communication request from a 2nd communication device, continuing communication that is perfor...  
JP3253973B2
Method and system for improving the degree of utilization of telecommunication channels in locally concentrated asynchronous wireless telecommunication systems wherein, in each telecommunication system, for a first telecommunication conn...  
JP2001358691A
To eliminate a state, where successive slots cannot be secured even though free slots are available when free slots are allocated at random.When another communication device 10 makes a request to allocate slots, the slot allocating metho...  
JP2001523933A
(57) A summary correspondence procedure and a communications system reduce the internal interference about the wireless communications performed with a radio local loop communications system to a permitted level. The problem relevant to ...  
JP3228055B2
PURPOSE: To allocate plural slots efficiently by allocating again a slot based on the end of an optional call and reserving idle slots for plural slots used highest in same frequencies. CONSTITUTION: In the radio communication system emp...  
JP2001519135A
(57) According to summary book invention, the method and equipment for carrying out digital radio transmission of the data are constituted by one of two or more carrier frequency (f, f, . . . ) between a fixed station (1) and at least on...  
JP3215018B2
PURPOSE: To provide various kinds of mobile communication systems capable of selecting various kinds of systems corresponding to the priority of a user. CONSTITUTION: A mobile machine and a radio base station are provided with the commun...  
JP3186733B2
To attain the effective utilization of a frequency, improvement in the stability of operation, cost-down and improvement in performance by enabling the transmission of at least two-way simultaneous calls with prescribed band width. A pri...  
JP2001189960A
To provide a digital wireless communication method and its system, that can attain voice communication with superior voice quality at a low cost. A wireless signal, sent through time slot assignment control by a TDMA/FDD system, is recei...  
JP3177481B2
To execute a larger number of simultaneous connecting processings while suppressing the rising of a cost and keeping a communication quality by providing a control means, etc., controlling a switch means and an interchanging means so as ...  
JP2001507896A
(57) Summary book invention relates to the method of making duplex telecommunication connection in the wireless connection which uses interactive communication of frame structure as a base, and the wireless system, with which interactive...  
JP3162576B2
PURPOSE: To make common the synchronizing circuit of a mobile terminal to be used for both the microcell system of a TDMA/TDD system and the macrocell system of a CDMA/TDD system by making common the basic frame constitution of a transmi...  
JP2001506071A
(57) Summary many subcarriers, the multi-slot system (220) inner adaptation channel distribution method, and a system are offered. The subset of the channel of M is chosen from a big set of the channel of N which can be used for the comm...  
JP3162409B2  
JP2001086250A
To prevent intermodulation from taking place by decreasing an input level to a degree not reaching a saturation level of a mixer and to attain long distance communication between a controller and each terminal. In this interphone system,...  
JP2001053626A
To obtain a device and method for carrier conversion which generate many dummy carriers by one carrier generator. This carrier converting device generates one of many forward dummy carrier signals selectively by using a dummy carrier gen...  
JP2001502150A
(57) Summary book invention relates to the channel quota method in a wireless system and a wireless system equipped with at least one base station (300) which communicates with the terminal (from 308 to 314) in hippo rage area (304). By ...  
JP2001025052A
To provide a high quality radio digital subscriber telephone system for improving frequency utilization efficiency by FDMA/TDMA.By using radio digital time division multiplex transmission channels between a base station mutually connecte...  
JP3127280B2  
JP2000517486A
A satellite direct audio broadcast system includes a plurality of fixed-rate, uniform, frequency division multiple access ("FDMA") uplinks and a time division multiplexed ("TDM") downlink. Source audio channels may be divided among and t...  
JP3117001B2
To eliminate noises and discontinuity of data caused by unnecessary data interpolation when data is interpolated to prevent data slip due to the deviation of more than one different sampling frequencies. This device has a signal processi...  
JP2000341575A
To shorten control time, to reduce circuit scale and to effectively utilize a carrier wave band by respectively transmitting a video signal through an analog modulation frequency multiplexing system and an audio signal or data signal thr...  
JP2000515698A
(57) The terminal radio communications system which can carry simultaneously summary data, a sound or data, and voice traffic is offered. A zone is divided at two or more channels, i. E. , hop, and the burst which consists of combination...  
JP3108744B2
PURPOSE: To provide a miniaturized and effective noise preventing circuit for a portable telephone set. CONSTITUTION: Concerning the noise preventing circuit for portable telephone set to communicate with a communication channel designat...  
JP2000307497A
To provide a load omission system which reinforces the up-link margin between a ground terminal and a satellite for a satellite-based communication system. The ground terminal 14 includes a multicarrier network 40 which is able to operat...  
JP3098968B2
To provide a system for eliminating the partial overlap of packets and controlling the transmission of a moving station by means of a base station and a radio packet transmission system for compensating an attribute which the moving stat...  
JP2000286888A
To facilitate a routing operation in an optical wave network and to realize a high speed transfer processing by permitting an optical wave access network to convert the user packet of a terminated layer into the light wave adaptation lay...  
JP2000269831A
To attain power saving in the case of controlling transmission power while keeping isolation of an output circuit. In the case of conducting transmission from an antenna 1 under a condition of 900 MHz, 2 Watts in compliance with the glob...  
JP2000511751A
(57) Summary book invention uses the data transmitting medium (23) by which at least 2 differ through a single transmitting center (21), It is the method of transmitting the data from two or more sauce (22) to two or more receivers (24),...  
JP2000511750A
(57) Summary book invention plans the method and equipment for communicating complicated resource allocation from a central access point or the base unit 14 efficiently to the mobile unit 10 which requires service. The base unit 14 distr...  
JP2000236284A
To obtain a correlation detecting device which can easily and surely detect the codes of an M series on which the timing is based, even when signals having different amplitudes are multiplexed on a time-division basis. This device is pro...  
JP2000508481A
Method and system for improving the degree of utilization of telecommunication channels in locally concentrated asynchronous wireless telecommunication systems wherein, in each telecommunication system, for a first telecommunication conn...  
JP3043415B2
PCT No. PCT/NL92/00039 Sec. 371 Date Aug. 23, 1993 Sec. 102(e) Date Aug. 23, 1993 PCT Filed Feb. 27, 1992 PCT Pub. No. WO92/16063 PCT Pub. Date Sep. 17, 1992System for broadcasting and receiving digital data within time divisional multip...  
JP3034281B2  
JP3021101B2
A method of operating a communications system, particularly a FDM-TDD cordless telephony system, in which, in order to expedite handover, a portable secondary station builds up a record of the status and quality of the other FDM channels...  
JP2000004483A
To attain the effective utilization of a frequency, improvement in the stability of operation, cost-down and improvement in performance by enabling the transmission of at least two-way simultaneous calls with prescribed band width. A pri...  
JP2984061B2  
JP2984593B2
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 ...  
JP2984648B2
To make the circuit small in size, light in weight and to reduce the power consumption. In this processing circuit, a mixer 2 applies quasi-synchronization detection to a plurality of frequency multiplex carriers, an A/D converter 3 conv...  
JP2979064B2
To enable two kinds of bidirectional simultaneous call transmission at least with prescribed band width by enabling the simultaneous multiplex use of frequency inside an applied network and using low-speed digital voice coding. The recei...  
JPH11313044A
To provide flexibility for managing the delay of a data transmission system by setting user data speed while using super frame structure and TDD. The number of bits capable of transmission through a super frame is determined, based on th...  

Matches 351 - 400 out of 805