Access technique of channel hopping communications system

    公开(公告)号:AU732197B2

    公开(公告)日:2001-04-12

    申请号:AU5581598

    申请日:1997-12-19

    Abstract: Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock.

    23.
    发明专利
    未知

    公开(公告)号:DE19882299T1

    公开(公告)日:2000-04-13

    申请号:DE19882299

    申请日:1998-04-03

    Abstract: In a multi-reuse level cellular communications system, a channel is assigned for use by a mobile unit by first determining whether the mobile unit is a non-enhanced mobile unit or an enhanced mobile unit. Then a determination is made as to the type of communication service being requested. A minimum link quality required by the mobile unit can then be established based on factors that include the mobile unit type and the type of communication service being requested. A base station that has the necessary receiver detection capabilities and transceiver processing capabilities is then selected, and a channel, corresponding to a highest reuse plan, available to the base station is assigned to the call.

    Access technique of channel hopping communications system

    公开(公告)号:AU5581598A

    公开(公告)日:1998-07-17

    申请号:AU5581598

    申请日:1997-12-19

    Abstract: Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock.

    Códigos ortogonales de longitud variable no contiguos

    公开(公告)号:ES2438532T3

    公开(公告)日:2014-01-17

    申请号:ES05757933

    申请日:2005-07-06

    Inventor: DENT PAUL

    Abstract: Un método de generar un código binario para su uso en el ensanchamiento de una señal de información, estando el método caracterizado por: seleccionar (2 - 1) un primer código de un conjunto de códigos de ensanchamiento binarios para servir como códigode pivotamiento, teniendo el código de pivotamiento un número distinto de cero de miembros de un primer valorbinario y un número distinto de cero de miembros de un segundo valor binario; seleccionar (2 - 2) posiciones del código de pivotamiento que tienen uno del primer valor binario y del segundo valorbinario para servir como primeras posiciones de objetivo; seleccionar (2 - 3) un segundo código del conjunto de códigos de ensanchamiento binarios para servir como uncódigo de derivación; reemplazar (2 - 4) chips del segundo código correspondientes a las primeras posiciones de objetivo del código depivotamiento con un valor no binario y formar por ello un primer código de ensanchamiento ternario.

    26.
    发明专利
    未知

    公开(公告)号:AT484124T

    公开(公告)日:2010-10-15

    申请号:AT01995644

    申请日:2001-11-21

    Abstract: A method and apparatus for enabling anonymous communications from a first Bluetooth device to a second Bluetooth device is disclosed wherein a temporary identification number associated with the first Bluetooth device is obtained and used in transmissions from the first Bluetooth device to the second Bluetooth device. A temporary identification number provides no clear indication of the particular Bluetooth communications device transmitting messages.

    FAST, HIGH RESOLUTION DIGITAL-TO-ANALOG CONVERTER

    公开(公告)号:HK1136907A1

    公开(公告)日:2010-07-09

    申请号:HK10103475

    申请日:2010-04-08

    Inventor: DENT PAUL

    Abstract: A fast, high resolution digital-to-analog converter (DAC) is described herein. The DAC comprises a pulse generator, decay circuit, controller, and sample circuit. The pulse generator serially outputs pulses representing digits of a digital word least significant digit first. Each pulse generates a response in the decay circuit that decays over time according to a known decay response. One exemplary decay circuit comprises an RC circuit having an exponential decay response. The controller controls the timing of the pulses output by the pulse generator such that the period of each pulse relates to a predetermined decay amount. The sample circuit samples an output of the decay circuit at a sample time after the decay circuit receives the pulse for the most significant digit. The sampled output represents the analog value corresponding to the input digital word. The digital word may have any length, radix, or format.

    28.
    发明专利
    未知

    公开(公告)号:AT264570T

    公开(公告)日:2004-04-15

    申请号:AT99972799

    申请日:1999-11-17

    Abstract: A receiver having a digital automatic gain control (AGC) circuit is disclosed for use in a cellular communication system, including a Hierarchical Cellular System. The receiver includes a controller which switches between gain control values depending on system operational mode. In this way, the AGC can be optimized for different types of receive processing operations, e.g., traffic reception and measurement of other channels.

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