公开(公告)号：JPH10257022A

公开(公告)日：1998-09-25

申请号：JP5017998

申请日：1998-02-16

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D ,  LAROSA CHRISTOPHER P

IPC: H03K5/00 ,  H04B1/16 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/26 ,  H04L7/00 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To provide a method and a CDMA receiver to acquire a pilot signal. SOLUTION: A retrieval receiver 114 is provided with a sample buffer 202 that uses a real time clock to store a loaded signal sample. A real time linear sequence generator (RT LSG) 206 stores an initial state and the time is counted by using a real time clock. The content of the RT SLG is loaded in a non-real time linear sequence generator (NRT LSG) 208 when sample processing is started. The sample is correlated by using the non-real time clock to make the signal processing independent of the chip speed. An analog front end reduces the power for the non-real time processing or is tuned to other frequency.

公开(公告)号：JPH10256942A

公开(公告)日：1998-09-25

申请号：JP5006698

申请日：1998-02-16

Applicant: MOTOROLA INC

Inventor： FRANK COLIN D ,  HONKISZ JENNIFER A ,  STORM BRIAN D

IPC: H04B7/26 ,  H04Q7/36 ,  H04B1/707

Abstract: PROBLEM TO BE SOLVED: To surely detect the availability of a CDMA(code division multiple access) service with a simple circuit constitution. SOLUTION: A radio telephone 121 uses a service detection circuit 125 which measures the energy of self-correlation of a reception composite CDMA signal and uses a different time delay for each measurement of the energy and is provided with at least one chip rate detector 109. A threshold detection circuit 127 couples measured energies, and the circuit 127 discriminates that the service is available of coupled energies exceed a threshold, but the circuit 127 discriminates that the service is not available if they don't exceed. Chip rate detectors 109 are coupled in parallel to be able to simultaneously measure the energy of self-correlation of the reception composite CDMA signal, or a single chip rate detector 109 can measure the energy of autocorrelation of the reception composite CDMA signal in series.

公开(公告)号：JPH10327101A

公开(公告)日：1998-12-08

申请号：JP5293898

申请日：1998-02-18

Applicant: MOTOROLA INC

Inventor： CALLICOTTE MARK J ,  STORM BRIAN D

IPC: H04B7/26 ,  H04B1/16 ,  H04W52/02 ,  H04W52/42 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To provide a method for low power for maintaining exact time at a mobile station while controlling the in/out of slotted paging mode by calculating time to wake up and the other intermediate time corresponding to a wake-up event before turning into a low power sleep state. SOLUTION: Based on the control of a call processor, a sleep time controller 200 turns a radio telephone into a low power sleep mode for a period based on the timing accuracy of a sleep clock generator 205. The call processor calculates the enable oscillator time, the warm-up time for restarting one part of RF part and the prewake time for restaring the reference timer of the modem. In the sleep mode, the sleep time controller 200 simulates system timing for getting out of the sleep mode to the end of sleep period determined by the call processor.

公开(公告)号：JPH10256984A

公开(公告)日：1998-09-25

申请号：JP6779098

申请日：1998-03-02

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D ,  CALLICOTTE MARK J ,  CAHILL STEPHEN V

IPC: H04B1/16 ,  H04B7/26 ,  H04M19/08 ,  H04W52/02 ,  H04J13/00 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To control entrance to/exit from a slotted paging mode in a mobile station like a radio telephone. SOLUTION: A radio telephone 104 in a radio telephone system 100 enters into a low power sleep mode and uses a sleep clock generator having a low resolution to measure the duration of the sleep mode. The radio telephone 104 uses an oscillator 116 having a high resolution to synchronize the timing of the radio telephone 104 with the system timing. The radio telephone 104 gets out of the low power sleep mode synchronously with the system timing.

公开(公告)号：FR2760157B1

公开(公告)日：2004-09-10

申请号：FR9716352

申请日：1997-12-23

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D ,  LAROSA CHRISTOPHER P

IPC: H03K5/00 ,  H04B1/16 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/26 ,  H04L7/00 ,  H04J13/02 ,  H04Q7/32 ,  H04B7/216

Abstract: A searcher receiver (114) includes a sample buffer (202) which stores signal samples loaded using a real time clock. A real time linear sequence generator (RT LSG) (206) stores an initial state and is clocked using the real time clock. The contents of the RT LSG are loaded into a non-real time linear sequence generator (NRT LSG) (208) when sample processing begins Samples are correlated using a non-real time clock to allow signal processing to be uncoupled from the chip rate. The analog front end (108) may be powered down or tuned to another frequency during non-real time processing.

公开(公告)号：GB2364487A

公开(公告)日：2002-01-23

申请号：GB0122909

申请日：1998-01-21

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D ,  LAROSA CHRISTOPHER COURT

IPC: H04B1/707 ,  H04B7/26

Abstract: The current invention aims to provide a fast and accurate pilot searching system. A receiver circuit for determining a timing of a pseudo random (PN) noise spreading code of a signal intended for a cellular telephone is disclosed. A first memory (202) stores digital samples of the signal at a first rate and at least one PN sequence generator produces at a second, higher rate a replica of the PN spreading code at a plurality of PN chip offsets. A multiplier (258) multiplies at the second rate, the signal, read from the first memory (202) with the replica of the PN spreading code at each of the plurality of PN chip offsets. A summing circuit (256) sums an output of the multiplier to produce correlation results and a second memory stores correlation results having highest correlation energies.

公开(公告)号：GB2352937B

公开(公告)日：2002-01-16

申请号：GB0011792

申请日：2000-05-16

Applicant: MOTOROLA INC

Inventor： LAROSA CHRISTOPHER P ,  STORM BRIAN D ,  CARNEY MICHAEL J ,  SCHIRTZINGER TRACIE A

IPC: H04B1/16 ,  H04B1/7075 ,  H04B7/26 ,  H04M1/00 ,  H04M1/73 ,  H04Q7/38

Abstract: A method of activating a radiotelephone operable in a spread-spectrum multiple access radiotelephone system. A searcher receiver ( 114 ) is activated, and the searcher receiver ( 114 ) acquires a PN sequence timing of a pilot signal. At least one demodulation branch ( 122 ) is activated after activation of the searcher receiver ( 114 ), and the demodulation branch synchronizes to the PN sequence timing of the selected pilot signal after the searcher receiver ( 114 ) has acquired the PN sequence timing.

公开(公告)号：GB2352937A8

公开(公告)日：2001-04-23

申请号：GB0011792

申请日：2000-05-16

Applicant: MOTOROLA INC

Inventor： LAROSA CHRISTOPHER P ,  STORM BRIAN D ,  CARNEY MICHAEL J ,  SCHIRTZINGER TRACIE A

IPC: H04B1/16 ,  H04B1/7075 ,  H04B7/26 ,  H04M1/00 ,  H04M1/73 ,  H04Q7/38

Abstract: A method of activating a radiotelephone operable in a spread-spectrum multiple access radiotelephone system. A searcher receiver ( 114 ) is activated, and the searcher receiver ( 114 ) acquires a PN sequence timing of a pilot signal. At least one demodulation branch ( 122 ) is activated after activation of the searcher receiver ( 114 ), and the demodulation branch synchronizes to the PN sequence timing of the selected pilot signal after the searcher receiver ( 114 ) has acquired the PN sequence timing.

公开(公告)号：BR9800744A

公开(公告)日：1999-06-29

申请号：BR9800744

申请日：1998-02-20

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D

IPC: H03K5/00 ,  H04B1/16 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/26 ,  H04L7/00 ,  H04Q7/32

Abstract: A searcher receiver (114) includes a sample buffer (202) which stores signal samples loaded using a real time clock. A real time linear sequence generator (RT LSG) (206) stores an initial state and is clocked using the real time clock. The contents of the RT LSG are loaded into a non-real time linear sequence generator (NRT LSG) (208) when sample processing begins Samples are correlated using a non-real time clock to allow signal processing to be uncoupled from the chip rate. The analog front end (108) may be powered down or tuned to another frequency during non-real time processing.

公开(公告)号：EP1661419A4

公开(公告)日：2009-07-22

申请号：EP04780603

申请日：2004-08-10

Applicant: MOTOROLA INC

Inventor： DORENBOSCH JHEROEN P ,  GIPSON JACK ANTHONY ,  HUFFERD LOWELL C III ,  HIRSBRUNNER ALEX P ,  BELKIN ANATOLY S ,  ALEN ANAND BERNARD ,  STORM BRIAN D

IPC: H04W36/14 ,  H04L12/28 ,  H04W88/06

CPC classification number: H04W36/32 ,  H04W24/00 ,  H04W36/14 ,  H04W60/00 ,  H04W84/12

Abstract: A system, wireless device (306) and method determine that a wireless device (306) is detecting a triggering event. The triggering event includes detecting a WLAN border cell (210), detecting a first signal from an egress portal (302), or detecting a degradation in signal quality. The wireless device (306) then detects at least one signal from an egress portal (302), determines that the wireless device (306) is moving from the coverage area of a first communications system to the coverage area of a second communications system according to the order of signals received from the egress portal (302), initiates a registration sequence with the second wireless communication system in response to determining that the wireless device (306) is moving from the coverage area of the first communications system to the coverage area of the second communications system, and conducts present and subsequent calls via the second wireless communication system.