公开(公告)号：AR050538A2

公开(公告)日：2006-11-01

申请号：ARP050103601

申请日：2005-08-29

Applicant: MOTOROLA INC

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

IPC: H04B1/16 ,  H04B7/26 ,  H04M19/08 ,  H04W52/02 ,  G08C17/00 ,  H04B7/216

Abstract: Un método para operar una estacion movil en un sistema de radioteléfonos de acceso multiple por division de codigos (CDMA) que incluye una pluralidad de estaciones de base que transmiten una secuencia de ruido pseudoaleatorio (PN) corta que incluye un indicador de sincronizacion del sistema que comprende un límite de retorno de PN de la secuencia de PN corta, el método comprende los pasos de: (a) determinar un balance entre un reloj de resolucion fina y un reloj de resolucion gruesa; (b) ingresar en un modo de inactividad de baja potencia; (c) sincronizar una duracion de la inactividad usando el reloj de resolucion gruesa; (d) sincronizar el reloj de resolucion fina de la estacion movil con el límite de retorno de PN de la secuencia de PN corta correlacionando una secuencia de PN corta generada en la estacion movil; determinar un equilibrio entre la senal del reloj de referencia y la senal de reloj inactivo basado en la precision de sincronizacion; ajustar la sincronizacion de la senal de reloj inactivo combinando la precision de sincronizacion de la senal de reloj inactivo y el equilibrio; e ingresar en un modo de inactividad de baja potencia durante una duracion de tiempo que está basada en la senal de reloj inactivo ajustada.

公开(公告)号：PL188807B1

公开(公告)日：2005-04-29

申请号：PL32508798

申请日：1998-02-27

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D ,  LAROSA CHRISTOPHER PETER

IPC: H03K5/00 ,  H04B1/16 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/26 ,  H04L7/00 ,  H04Q7/20 ,  H04B7/216 ,  H04Q7/32 ,  H04J13/00

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：FR2760312B1

公开(公告)日：2003-09-05

申请号：FR9716353

申请日：1997-12-23

Applicant: MOTOROLA INC

Inventor： CALLICOTTE MARK ,  STORM BRIAN D

IPC: H04B7/26 ,  H04B1/16 ,  H04W52/02 ,  H04W52/42 ,  H04Q7/32

Abstract: Prior to entry into a low-power sleep mode, a radiotelephone (104) in a radiotelephone system (100) calculates in advance the timing required to wake up selected portions of the radiotelephone and stores the calculated wakeup times in registers (216). Also prior to entry into sleep mode, local timing of the radiotelephone is synchronized to received PN roll boundaries from the radiotelephone system. In the sleep mode, the radiotelephone uses a sleep timer (210) to simulate system timing. When the sleep timer (210) matches the stored wakeup times, the radiotelephone re-activates the selected portions of the radiotelephone, such as an oscillator (116) and a radio frequency portion (109) of an analog front end (108), to exit the sleep mode and reacquire communication with the system. This also permits an early exit from sleep mode, for example to service an interrupt, while maintaining system timing.

公开(公告)号：HU221388B1

公开(公告)日：2002-09-28

申请号：HU9800230

申请日：1998-02-04

Applicant: MOTOROLA INC

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

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

Abstract: A radiotelephone (104) in a radiotelephone system (100) enters a low power sleep mode and times the duration of the sleep mode using a sleep clock generator (205) having a coarse resolution. The radiotelephone synchronizes timing of the radiotelephone to system timing using an oscillator (116) having a fine resolution. The radiotelephone then exits the low power sleep mode synchronized with system timing.

公开(公告)号：DE19806684C2

公开(公告)日：2002-05-23

申请号：DE19806684

申请日：1998-02-18

Applicant: MOTOROLA INC

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

IPC: H04B7/26 ,  H04Q7/36 ,  H04Q7/20

公开(公告)号：GB2364487B

公开(公告)日：2002-03-13

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

公开(公告)号：MX9801612A

公开(公告)日：1998-11-30

申请号：MX9801612

申请日：1998-02-27

Applicant: MOTOROLA INC

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

IPC: H04B7/26 ,  H04Q7/36 ,  G11B03/00

Abstract: Un radioteléfono (121) emplea un circuito de deteccion de servicio (125) que comprende al menos un detector de velocidad de chips (109) que mide la energía de la autocorrelacion de una señal de CDMA compuesta recibida y emplea un retardo diferente para cada medicion de la energía. Un circuito de deteccion de umbral (127) combina las energías medidas y determina que el servicio está disponible si las energías combinadas exceden el umbral y de lo contrario, determina que el servicio no está disponible. Los detectores de velocidades de chips (109) pueden conectarse en paralelo para proporcionar mediciones simultáneas de la energía de la autocorrelacion de la señal de CDMA compuesta recibida, o un solo detector de velocidad de chips (109) puede medir en serie la energía de la autocorrelacion de la señal de CDMA compuesta recibida.

公开(公告)号：GB2317077B

公开(公告)日：1998-11-11

申请号：GB9716298

申请日：1997-08-04

Applicant: MOTOROLA INC

Inventor： KRAUSE DAVID J ,  STORM BRIAN D ,  TARANOWSKI WILLIAM F ,  EBERHARDT MICHAEL A

IPC: H04W36/18 ,  H04W48/16 ,  H04Q7/38 ,  H04B7/26

Abstract: An apparatus (100) maintains a Pilot Set in a digital communication system that utilizes Code Division Multiple Access. The apparatus comprises a logic and control circuit (113) for providing instructions to a searcher receiver (109). The searcher receiver, in response to the instructions, sequentially scans active pilots, then candidate pilots, and then pre-candidate pilots. The scan of the pre-candidate pilots continues until all but a predetermined number of pre-candidate pilots have been promoted or demoted. Then the searcher receiver alternately scans the predetermined number of pre-candidate pilots and the neighbor pilots. The searcher receiver terminates alternate scans of the predetermined number of pre-candidate pilots and the neighbor pilots when a one of the neighbor pilots is promoted, and resumes the scan of the pre-candidate pilots.

公开(公告)号：GB2324681A

公开(公告)日：1998-10-28

申请号：GB9801285

申请日：1998-01-21

Applicant: MOTOROLA INC

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

IPC: H04B1/16 ,  H04B7/26 ,  H04M19/08 ,  H04W52/02 ,  H04Q7/32 ,  H04M1/72

Abstract: A CDMA radiotelephone 104 enters a low power sleep mode and times the duration of the sleep mode using a sleep clock generator (205, fig. 2) having a coarse resolution (32KHz). The radiotelephone synchronises timing of the radiotelephone to the system timing using an oscillator 116 having a fine resolution (16.8MHz). The radiotelephone then exits the low power sleep mode synchronised with the system timing. The fine resolution clock is de-activated when the sleep mode is entered but re-activated before the telephone exits from the sleep mode to allow sufficient time for the fine resolution clock to stabilise. An offset between the coarse resolution clock and the fine resolution clock and an offset between the timing of the coarse resolution clock and the timing of the system timing are determined and used in the process. The system timing indicator comprises a pseudorandom noise (PN) roll boundary of a short PN sequence transmitted by a system base station.

公开(公告)号：GB2316836B

公开(公告)日：1998-10-28

申请号：GB9717381

申请日：1997-08-18

Applicant: MOTOROLA INC

Inventor： STORM BRIAN D ,  KRAUSE DAVID J

IPC: H04B1/7075 ,  H04B1/7077 ,  H04B1/7117 ,  H04B7/216 ,  H04W36/30 ,  H04W36/36 ,  H04W72/08 ,  H04Q7/38 ,  H04B7/26

Abstract: A wireless communication device 100 acquires a pilot channel before an assigned slot when the wireless communication device is operating in the slotted mode of a CDMA system. The wireless communication device comprises a searcher receiver 107 that determines the short-term average pilot strength of active and neighbor pilot channels. Finger receivers 107 determine the long-term average pilot strength of the active and neighbor pilot channels. A logic and control circuit 113 assigns the finger receivers to the pilot channels according to their short-term average pilot strength, determines if the long-term average pilot strength of a neighbor channel is greater than the active pilot channel's pilot strength, and determines to hand off to the neighbor pilot channel with the greater long-term average pilot strength. Moreover, an early detection correlation length can be dynamically adjusted according to the pilot strength of the active pilot channel to shorten the pilot acquisition process.