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公开(公告)号：ES2098185B1
公开(公告)日：1997-12-16
申请号：ES9450017
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：GB2272133B
公开(公告)日：1996-06-12
申请号：GB9222922
申请日：1992-11-02
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：AU664497B2
公开(公告)日：1995-11-16
申请号：AU5149493
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：HUT68149A
公开(公告)日：1995-05-29
申请号：HU9401972
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：RO119672B1
公开(公告)日：2005-01-28
申请号：RO00101241
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: The invention relates to a radiotelephony unit for the communication within a time division multiple access (TDMA) with resource distribution (trunked) within the time slots, of a radio channel comprising predetermined linearization intervals (120) for the transmission of some training signals necessary for the linearization, interspersed between other traffic or control time slots. According to the invention, the radiotelephony unit 5) which is located remotely relative to a base station (6) comprises a linearization circuit (10), a frequency increasing converter (11), a power amplifier (12), a reaction loop (13), a frequency lowering converter (14), a phase detector (15) and a phase adjusting circuit 16), the linearization circuit (10) and the phase adjusting circuit (16) being controlled by some signal generating means (20), namely a microprocessor. The radiotelephony unit (5) also comprising an antenna (21) connected to an antenna tuning switch (22) and a receiver (24) is provided with a linearization function which allows it to generate a training signal during a linearization interval (120), said training signal being necessary for the linearization of the power amplifier (12) during said interval, prior to the transmission of the signals during one of the other said time slots and independently of the transmission thereof.
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Patent Agency Ranking
公开(公告)号：SE516994C2
公开(公告)日：2002-04-02
申请号：SE9402325
申请日：1994-07-01
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：GR3032966T3
公开(公告)日：2000-07-31
申请号：GR20000400666
申请日：2000-03-16
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：FR2744318B1
公开(公告)日：2000-01-28
申请号：FR9700068
申请日：1997-01-07
Applicant: MOTOROLA INC
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公开(公告)号：GB2309854A
公开(公告)日：1997-08-06
申请号：GB9601772
申请日：1996-01-30
Applicant: MOTOROLA INC
Inventor： VALENTINE STEPHEN THOMAS , AITKENHEAD GARY , AFTELAK ANDREW JOHN , CHATER-LEA DAVID JOHN , FOGEL ELIEZER , SERFATY SALOMON
Abstract: A station RX1 communicating on a particular channel with a station TX1 transmits a periodic channel busy signal while it is receiving from TX1 so that a potentially interfering station TX2 is made aware that the channel is in use even if TX2 is out of range of TX1.
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公开(公告)号：DE4395427T1
公开(公告)日：1994-12-01
申请号：DE4395427
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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