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公开(公告)号：CA2050892A1
公开(公告)日：1990-12-27
申请号：CA2050892
申请日：1990-05-17
Applicant: MOTOROLA INC
Inventor： SCHWENDEMAN ROBERT J , KUZNICKI WILLIAM J , WILLARD DAVID F , DELUCA MICHAEL J , NELSON LEONARD E , JASINSKI LEON
Abstract: 2050892 9100655 PCTABS00003 This invention relates to selective call receivers (11), such as paging receivers, for receiving modulated data signals having a variable bit rate. A band pass filter (26), particularly an I. F. filter, is provided having an adjustable bandwidth. The bandwidth of the filter is adjusted in accordance with a code in the received signal which indicates the bit rate.
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12.发明公开
公开(公告)号：EP0639310A4
公开(公告)日：1999-04-28
申请号：EP93910832
申请日：1993-04-28
Applicant: MOTOROLA INC
Inventor： MUN KYUNG T , GANUCHEAU CHARLES J JR , NELSON LEONARD E
CPC classification number: H04W52/0229 , H04W88/022 , Y02D70/00
Abstract: A selective call receiver (30) for receiving selective call signals in a universal synchronization code operating mode receives signals having the conventional POCSAG sync code and signals having dual sync codes and decodes the signals appropriately to recover personal and information services messages. Whether the receiver (30) is operating in a conventional POCSAG system or a dual sync code system, the receiver (30) conserves battery power by activating the high battery draining receiver circuit (34) only during frames (106) of the signal (100) wherein personal message addresses or database information is likely to appear. The frames (106) where the personal message addresses are likely to appear and where the database information appear are indicated by a frame byte stored in a memory (48) with the corresponding address.
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公开(公告)号：SG43086A1
公开(公告)日：1997-10-17
申请号：SG1996003433
申请日：1990-12-18
Applicant: MOTOROLA INC
Inventor： NELSON LEONARD E , SCHWENDEMAN ROBERT , DELUCA MICHAEL J
Abstract: A selective call receiver receives a signal having a baud rate and comprising a number of phases. The number of phases are time division multiplexed to form the signal. The selective call receiver has selective call address information assigned thereto and includes a receiver for receiving and demodulating the signal and a memory for storing predetermined information. A demultiplexer is coupled to the receiver and the memory for demultiplexing the signal to recover one of the number of phases in response to the predetermined information and the baud rate. The selective call receiver also includes a decoder coupled to the demultiplexing means for decoding said one of said number of phases of said signal to derive a selective call message therefrom.
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公开(公告)号：AT158461T
公开(公告)日：1997-10-15
申请号：AT91902030
申请日：1990-12-18
Applicant: MOTOROLA INC
Inventor： NELSON LEONARD E , SCHWENDEMAN ROBERT J , DELUCA MICHAEL J , WILLARD DAVID F , SANDVOS JERRY LEE ALBERT , BRAUN WILLIAM V
Abstract: A selective call receiver receives a signal having a baud rate and comprising a number of phases. The number of phases are time division multiplexed to form the signal. The selective call receiver has selective call address information assigned thereto and includes a receiver for receiving and demodulating the signal and a memory for storing predetermined information. A demultiplexer is coupled to the receiver and the memory for demultiplexing the signal to recover one of the number of phases in response to the predetermined information and the baud rate. The selective call receiver also includes a decoder coupled to the demultiplexing means for decoding said one of said number of phases of said signal to derive a selective call message therefrom.
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Patent Agency Ranking15.发明专利
公开(公告)号：CA1292781C
公开(公告)日：1991-12-03
申请号：CA577738
申请日：1988-09-19
Applicant: MOTOROLA INC
Inventor： LEONARDO VICTORIA A , NELSON LEONARD E
Abstract: Apparatus and method is disclosed for storing, and subsequently transmitting later, messages for system pagers with acknowledge back capability that nevertheless fail to acknowledge back in the first instance. Addresses are retransmitted for pagers initially failing to acknowledge back on a continuous periodic basis until such acknowledge back is received, at which time the message intended therefor is sent, or a predetermined time period expires.
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公开(公告)号：CA2071207A1
公开(公告)日：1991-07-03
申请号：CA2071207
申请日：1990-12-18
Applicant: MOTOROLA INC
Inventor： NELSON LEONARD E , SCHWENDEMAN ROBERT J , DELUCA MICHAEL J , WILLARD DAVID F , SANDVOS JERRY L A , BRAUN WILLIAM V
Abstract: A selective call receiver receives a signal having a baud rate and comprising a number of phases. The number of phases are time division multiplexed to form the signal. The selective call receiver has selective call address information assigned thereto and includes a receiver for receiving and demodulating the signal and a memory for storing predetermined information. A demultiplexer is coupled to the receiver and the memory for demultiplexing the signal to recover one of the number of phases in response to the predetermined information and the baud rate. The selective call receiver also includes a decoder coupled to the demultiplexing means for decoding said one of said number of phases of said signal to derive a selective call message therefrom.
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17.发明专利
公开(公告)号：AU2794289A
公开(公告)日：1989-06-14
申请号：AU2794289
申请日：1989-11-07
Applicant: MOTOROLA INC
Inventor： LEONARDO VICTORIA A , NELSON LEONARD E
Abstract: Apparatus (10) and method is disclosed for storing and later retransmitting messages for system pagers (12) with acknowledge back capability that nevertheless fail to acknowledge back in the first instance. Addresses are retransmitted for pagers (12) initially failing to acknowledge back on a continuous periodic basis until such acknowledge back is received, at which time the message intended therefor is sent, or a predetermined time period expires.
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公开(公告)号：EP1344412A4
公开(公告)日：2007-01-24
申请号：EP01989910
申请日：2001-12-07
Applicant: MOTOROLA INC
Inventor： NELSON LEONARD E , AYERST DOUGLAS I
CPC classification number: H04W8/245 , H04W48/16 , H04W88/022
Abstract: A method is provided for background scanning in a selective call communication system (102) having a plurality of channels (110, 112, 114), wherein a selective call device (104) has designated thereto one of an odd and even frame compulsory decoding schedule. The selective call device (104) decodes system configuration information (SCI) on odd SCI frames during the odd compulsory decoding schedule, scans for even SCI frames of target channels while maintaining the odd compulsory decoding schedule, and releases or maintains the odd compulsory decoding schedule based on the system configuration information found on the target channels.
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公开(公告)号：EP0880861A4
公开(公告)日：2000-10-11
申请号：EP97906002
申请日：1997-02-11
Applicant: MOTOROLA INC
Inventor： AYERST DOUGLAS IRVING , KHAN MALIK J , MOORE MORRIS , NELSON LEONARD E , CHOI KWOK K
CPC classification number: H04W88/022
Abstract: A selective call receiver (106) has a frequency synthesizer (708) for scanning a plurality of frequencies to determine a control channel to receive a signal and a receiver (704) for receiving the signal representative of an available frequency associated with a geographic region. The signal includes a channel identifier (404), a frequency assignment (406) and an active channel indicator (408). A processor (712) associates the channel identifier (404) with the frequency assignment (406) in response to the active channel indicator (408) indicating an availabe frequency of the geographic region and a memory (720) stores channel identifiers (404) associated with frequency assignments (406) designating available frequencies (408). The receiver (704) receives an address (333) and the channel identifier (404) on the control channel, a decoder (714) decodes the channel identifier (404) associated with the frequency assignment (406) to determine the available frequency where a message will be transmitted and the frequency synthesizer (708) switches to the available frequency indicated by the channel identifier (404) for receiving the message.
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