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    Wireless communication unit, linearised transmitter circuit and method of linearising therein
    71.
    发明专利
    Wireless communication unit, linearised transmitter circuit and method of linearising therein 未知

    公开(公告)号：GB2459990A

    公开(公告)日：2009-11-18

    申请号：GB0913952

    申请日：2007-11-01

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  GAILUS PAUL H ,  GROSSMAN OVADIA ,  ROZENTAL MARK

    IPC: H04B1/04

    Abstract: A wireless communication unit (300) comprises a linearised transmitter (325) having a forward path and a feedback path, respectively comprising at least one up- mixer and down-mixer, and forming two loops in quadrature. A phase training signal is applied to the at least one down-mixer in the feedback path in an open loop mode of operation to identify a loop phase adjustment to be applied. At least one of the two loops is switched to a closed loop mode of operation and the loop phase adjustment is applied to at least one up-mixer located in the forward path.

    72.
    发明专利
    未知

    公开(公告)号：DE602004023291D1

    公开(公告)日：2009-11-05

    申请号：DE602004023291

    申请日：2004-04-30

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  BEN-SALMON AVI ,  ROZENTAL MARK

    IPC: H03F1/34 ,  H03F1/32 ,  H03F3/24 ,  H04L27/36

    Abstract: In accordance with the present invention there is those provided a Cartesian loop transmitter having an isolator eliminator circuitry comprising a set of low pass and band pass filters for each of an I- and Q-channels, root mean square detectors and a divider connected to a comparator are received by a microprocessor which controls attenuation setting. There is also provided a method of adjusting an output level of such transmitter. Said method comprises the step of measuring an on-channel signal level and a noise level and then calculating a ratio of said noise to said on-channel signal. If the ratio exceeds a defined threshold an attenuation of the input attenuators is increased.

    73.
    发明专利
    未知

    公开(公告)号：DE602004021245D1

    公开(公告)日：2009-07-09

    申请号：DE602004021245

    申请日：2004-03-11

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  NOCHAM GABRIELA ,  ROZENTAL MARK

    IPC: H04L27/36 ,  H03F1/32 ,  H03F1/34 ,  H04L27/00

    Abstract: A wireless communication unit ( 300 ) comprises a linearised transmitter ( 325 ) having a forward path, a power amplifier ( 324 ) and a feedback loop, operably coupled to the power amplifier ( 324 ) and the forward path. The feedback loop comprises a loop adjustment function ( 442 ), and the forward path and feedback loop comprise quadrature circuits. A processor ( 322 ) applies a first training signal to a first quadrature circuit loop for routing through the forward path, power amplifier and feedback path to determine at least one first parameter setting of the loop adjustment function ( 442 ). The processor ( 322 ) also applies a second training signal to a second quadrature circuit loop to determine at least a second parameter setting of the loop adjustment function ( 442 ).

    76.
    发明专利
    未知

    公开(公告)号：DE60213439T2

    公开(公告)日：2006-12-21

    申请号：DE60213439

    申请日：2002-06-03

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  ROZENTAL MARK ,  PASTERNAK ROMAN

    IPC: H03G3/30 ,  H03G3/20

    Abstract: An automatic gain control (AGC) circuit including: a forward transmission path ( 214 ) having applied at its input an input RF signal and to provide at its output an output signal; a variable gain AGC amplifier ( 210 ) in the forward transmission path for processing the input RF signal, which amplifier has a control input 240 and is responsive to a control signal applied at its control input to vary its gain; a feedback loop ( 220 to 240 ), coupled from the output of the forward transmission path and to the control input of the AGC amplifier; an integrator ( 230, 232 ), coupled to the control input of the amplifier; a voltage source ( 234 ), coupled to the integrator and to the control input of the amplifier; and a further variable gain device ( 215 ) for varying the gain or attenuation of a signal applied to the control input of the AGC amplifier.

    ANTENA HELICOIDAL.
    77.
    发明专利
    ANTENA HELICOIDAL. 未知

    公开(公告)号：ES2260461T3

    公开(公告)日：2006-11-01

    申请号：ES02748837

    申请日：2002-07-01

    Applicant: MOTOROLA INC ,  MOTOROLA LTD

    Inventor： GROSSMAN OVADIA ,  BEN-AYUN MOSHE ,  ROZENTAL MARK

    IPC: H01Q1/36 ,  H01Q9/36 ,  H01Q11/08

    Abstract: Una antena (1) para su uso en un dispositivo de radiocomunicaciones, teniendo la antena una longitud no mayor de 100 mm, e incluyendo una primera parte (3) que comprende una bobina helicoidal o espiral conductora, que se extiende a lo largo de un eje (2), y situada y conectada eléctricamente entre dos partes adicionales, es decir una segunda parte (5) para la conexión a un conductor del dispositivo de radio, y comprendiendo una parte adaptadora lineal conductora, y una tercera parte (7) que comprende una parte capacitiva conductora, en donde las partes están dispuestas mutuamente para proporcionar a una frecuencia operativa del dispositivo de radio, una estructura de resonancia eléctrica, en la que la tercera parte (7) comprende un cilindro hueco que se extiende a lo largo del eje de la bobina, caracterizada porque el cilindro hueco comprende una placa curvada, y porque la tiene un espacio libre (7c) entre sus bordes laterales (7a, 7b).

    Receiver for use in wireless communications
    80.
    发明专利
    Receiver for use in wireless communications 未知

    公开(公告)号：GB2415846A

    公开(公告)日：2006-01-04

    申请号：GB0414459

    申请日：2004-06-29

    Applicant: MOTOROLA INC

    Inventor： BEN-AYUN MOSHE ,  CORSE NIR ,  GROSSMAN OVADIA ,  ROZENTAL MARK

    IPC: H03D3/00

    Abstract: A wireless receiver for receiving and demodulating a frequency modulated RF signal by direct conversion includes, a circuit 107,109,113 producing in-phase and quadrature components of the received signal, and an estimator 204 periodically estimating an imbalance in amplitude between the in-phase and quadrature components and applying a relative adjustment in amplitude to compensate for the detected imbalance 205. The estimator 204 (i) divides samples I i of the in-phase component I (t) and corresponding samples Q i of the quadrature component Q (t) into blocks; (ii) calculates for each block a block power value I n corresponding to a summation of values of squares of the samples I i and a block power value Q n corresponding to a summation of values of squares of the samples Q i; (iii) calculates from the block power values I n and Q n a block amplitude imbalance value and (iv) calculates for a set of the block amplitude imbalance values an average value.

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