公开(公告)号：CA2071207C

公开(公告)日：1996-08-20

申请号：CA2071207

申请日：1990-12-18

Applicant: MOTOROLA INC

Inventor： NELSON LEONARD EDWARD ,  SCHWENDEMAN ROBERT JOHN ,  DELUCA MICHAEL JOSEPH ,  WILLARD DAVID FRANK ,  SANDVOS JERRY LEE ALBERT ,  BRAUN WILLIAM VICTOR

IPC: H04L7/00 ,  H04W8/24 ,  H04W88/02 ,  H04W88/18 ,  H04Q7/08 ,  H04J3/12 ,  H04J3/22

Abstract: A signalling protocol (70) comprising a plurality of interleaved phases (90a, 90b, 90c and 90d) is transmitted at one of a plurality of baud rates, the plurality of baud rates being multiples of a base baud rate. The signalling protocol (70) allows a selective call receiver (FIG. 5) to decode at an operating baud rate equivalent to the base baud rate irrespective of the transmission baud rate by decoding only a portion (90a, 90b, 90c or 90d) of the transmitted signal, the portion decoded (90a, 90b, 90c or 90d) determined by the baud rate and the address of the selective call receiver.

公开(公告)号：AU6928274A

公开(公告)日：1975-11-27

申请号：AU6928274

申请日：1974-05-23

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE JOSEPH ,  GIACOMINO GERALD LEE ,  BRAUN WILLIAM VICTOR ,  PARTIPILO PHILIP ,  BRU WILLIAM VICTOR

IPC: H04B1/06 ,  G06F17/15 ,  H04L13/18 ,  H04L17/16 ,  H04W88/02 ,  G09C1/00 ,  H03K5/18

Abstract: A detector for detecting predetermined digital words within a train of signals wherein the digits in the words each have a predetermined time period. The detector continuously samples the train of signals coupled thereto. Samplings are taken a number of times during the interval of a digit time period, and a digital signal corresponding to the sampled signal for each sample taken is stored in a multi-stage storage register. Comparison circuitry compares the digital signals in the storage register with a first predetermined word in a memory circuit. If there is a correlation, the comparison circuit counts for a time period long enough to sample the train of signals and store a new series of signals corresponding to a second digital word. The comparison circuit compares these second digital signals with a second word in the memory circuit. A correlation between theset two words produces a detection signal.

公开(公告)号：DE2302229A1

公开(公告)日：1973-08-02

申请号：DE2302229

申请日：1973-01-17

Applicant: MOTOROLA INC

Inventor： BRAUN WILLIAM VICTOR ,  BROWN DANIEL PETER ,  LEITICH ALBERT JOSEPH

IPC: H04B1/40 ,  H03G3/34 ,  H04B1/10 ,  H04B7/26 ,  H04Q7/14 ,  H04Q7/02

公开(公告)号：IT1178426B

公开(公告)日：1987-09-09

申请号：IT4883084

申请日：1984-09-12

Applicant: MOTOROLA INC

Inventor： SHANLEY CHARLES W ,  BRAUN WILLIAM VICTOR

IPC: H04B20060101 ,  H04B

Abstract: A resovator part (42) of the piezoelectric device (40) provides the frequency determining component for the local oscillator (10) which controls the operating frequencies of the receiver (20) and transmitter (30). With the signal routing switch (60) set so that the wiper (62) contacts the terminal (60B), signal centred on 150 Mttz are passed by bondpass filter (44) to the mixer stage (22) of the receiver, from the aerial (50). The signal received is down-converted to 35 kHz, demodulated, amplified (24) and pressed to a speaker (26) which outputs the audio signal modulated on the RF input signal. In the transmit mode of operation, the push-to-talk line (32) is actuated which causes the output of the transmitter (30) to be connected to the filter through the switch stations (60A,60C). The microphone signal (34) is modulated (36) and up-converted by mixer (38) to 150 MHz. The oscillator resonator (42) and crystal filter (42) both operate at or near to 150 MHz.

公开(公告)号：DE2426179A1

公开(公告)日：1974-12-12

申请号：DE2426179

申请日：1974-05-29

Applicant: MOTOROLA INC

Inventor： BRAUN WILLIAM VICTOR ,  BRUCKERT EUGENE JOSEPH ,  GIACOMINO GERALD LEE ,  PARTIPILO PHILLIP

IPC: H04B1/06 ,  G06F17/15 ,  H04L13/18 ,  H04L17/16 ,  H04W88/02 ,  H04Q9/00

Abstract: A detector for detecting predetermined digital words within a train of signals wherein the digits in the words each have a predetermined time period. The detector continuously samples the train of signals coupled thereto. Samplings are taken a number of times during the interval of a digit time period, and a digital signal corresponding to the sampled signal for each sample taken is stored in a multi-stage storage register. Comparison circuitry compares the digital signals in the storage register with a first predetermined word in a memory circuit. If there is a correlation, the comparison circuit counts for a time period long enough to sample the train of signals and store a new series of signals corresponding to a second digital word. The comparison circuit compares these second digital signals with a second word in the memory circuit. A correlation between theset two words produces a detection signal.

公开(公告)号：AU6840987A

公开(公告)日：1988-07-27

申请号：AU6840987

申请日：1987-01-12

Applicant: MOTOROLA INC

Inventor： BRAUN WILLIAM VICTOR

IPC: H04B7/17

公开(公告)号：DE2419542A1

公开(公告)日：1974-11-07

申请号：DE2419542

申请日：1974-04-23

Applicant: MOTOROLA INC

Inventor： BRAUN WILLIAM VICTOR ,  HANDY EDWARD FRANK

IPC: G01S1/08 ,  G01C21/00 ,  G01S3/72 ,  G01S5/04

Abstract: 1446369 Radio position finding MOTOROLA Inc 1 April 1974 [23 April 1973] 14300/74 Heading H4D In a vehicle radio position finding system of the type wherein a vehicle 10, Fig. 1, radiates a signal which is received at three sites 12, 14, 16 and phase compared to give sets of hyperbolic path-difference loci for the vehicle, the determined position of the vehicle can be put in error by the reflection of the radiated signal from buildings 18, 20 &c. It is stated thet by radiating the signal in a plurality of successive different radiation patterns, e.g. a, b, c, d, Fig. 3, and determining the vehicle's position for each radiation pattern, that the location errors Fig. 6 for each respective pattern vary in a random manner with movement of the vehicle, and an averaging of the phase comparisons or positions produces a much more stable position determination.

公开(公告)号：DE2404116A1

公开(公告)日：1974-08-01

申请号：DE2404116

申请日：1974-01-29

Applicant: MOTOROLA INC

Inventor： BRAUN WILLIAM VICTOR

IPC: H04B7/15 ,  H04B1/48 ,  H04B1/54 ,  H04B3/60 ,  H04B7/17 ,  H04B7/20 ,  E21F17/18

Abstract: An asynchronous radio repeater system for providing radio coverage within a large building or the like employs a plurality of pulse repeaters distributed over the communications area. Each repeater receives oscillation pulses from a portable pulse transmitter or from another repeater and transmits pulses of oscillations having substantially the same frequency as the received oscillations. A blanking system is incorporated in each repeater to disable the repeater for a predetermined time duration following tee transmission of a pulse to prevent self-sustaining oscillation of the system.