公开(公告)号：DE4330054A1

公开(公告)日：1994-04-07

申请号：DE4330054

申请日：1993-09-06

Applicant: MOTOROLA INC

Inventor： CUDAK MARK C ,  HIBEN BRADLEY M ,  LO GALBO ROBERT D

IPC: H04H20/67 ,  H04B7/005 ,  H04B7/22

Abstract: A simulcast radio transmission system (250) transmits message signals (318) including selective call tones, originating from a message source (202), to a geographical area (115). The simulcast system includes a controller (204) coupled between the message source (202) and a plurality of remote transmitter sites (208, 210) for exchanging message signals (318) including selective call tones therebetween. Connecting the controller (204) to the plurality of transmitter sites (208, 210) are a plurality of interconnect links (224, 226), each having bounded propagation time delay characteristics. The simulcast system (250) employs phase numbers associated with the starting phase of the selective call tones to allow accurate reconstruction of the selective call tones. The controller (204) then combines (508) the message signals (318) with the launch time and the phase number to establish a message bundle and sends the message bundle to at least one of the plurality of transmitters (208, 210), via at least one of the plurality of interconnect links (224, 226).

公开(公告)号：GB2271248B

公开(公告)日：1997-04-02

申请号：GB9316803

申请日：1993-08-12

Applicant: MOTOROLA INC

Inventor： CUDAK MARK C ,  HIBEN BRADLEY M ,  LO GALBO ROBERT D

IPC: H04H20/67 ,  H04H3/00

Abstract: A simulcast radio transmission system (250) transmits message signals (318) including selective call tones, originating from a message source (202), to a geographical area (115). The simulcast system includes a controller (204) coupled between the message source (202) and a plurality of remote transmitter sites (208, 210) for exchanging message signals (318) including selective call tones therebetween. Connecting the controller (204) to the plurality of transmitter sites (208, 210) are a plurality of interconnect links (224, 226), each having bounded propagation time delay characteristics. The simulcast system (250) employs phase numbers associated with the starting phase of the selective call tones to allow accurate reconstruction of the selective call tones. The controller (204) then combines (508) the message signals (318) with the launch time and the phase number to establish a message bundle and sends the message bundle to at least one of the plurality of transmitters (208, 210), via at least one of the plurality of interconnect links (224, 226).

公开(公告)号：GB2271248A

公开(公告)日：1994-04-06

申请号：GB9316803

申请日：1993-08-12

Applicant: MOTOROLA INC

Inventor： CUDAK MARK C ,  HIBEN BRADLEY M ,  LO GALBO ROBERT D

IPC: H04H20/67 ,  H04H3/00

Abstract: A simulcast radio transmission system (250) transmits message signals including selective call tones, originating from a message source (202). The system includes a controller (204) which is connected to a plurality of remote transmitter sites (208, 210) by interconnect links (224, 226), each having bounded propagation time delay characteristics. The simulcast system (250) employs phase numbers associated with the starting phase of the selective call tones to allow accurate reconstruction of the selective call tones. The controller (204) then combines (508) the message signals (318) with the launch time and the phase number to establish a message bundle and sends the message bundle to the transmitters (208, 210), via interconnect links (224, 226). The controller (204) and each of the remote transmitters (208, 210) receive a precision reference signal (from a GPS Satellite 201).