公开(公告)号：AT443941T

公开(公告)日：2009-10-15

申请号：AT04741499

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.

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.

公开(公告)号：GB2403086A

公开(公告)日：2004-12-22

申请号：GB0313928

申请日：2003-06-17

Applicant: MOTOROLA INC

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

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

Abstract: When an isolator is not provided between a power amplifier 126 and an antenna 128, reflected power can increase amplifier distortion. Because an isolator is bulky, narrowband and expensive, it is preferred to use instead an isolator eliminator 106 which attenuates the input baseband signals when excessive adjacent channel power is detected in the Cartesian loop error signals. Attenuation is increased in steps, allowing time for settling of the loop, until the ratio of the adjacent channel and on-channel signal amplitudes falls below a threshold. The on-channel and adjacent channel amplitude signals are produced respectively by low-pass 138,142 and bandpass filters 140,144 coupled to root-mean-square detectors 146,148.

公开(公告)号：GB2466072B

公开(公告)日：2011-03-23

申请号：GB0822730

申请日：2008-12-12

Applicant: MOTOROLA INC

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

IPC: H03F1/32

Abstract: An integrated circuit includes a linearizer circuit in which excessive delay is compensated. The linearizer circuit includes a power amplifier, forward and feedback paths, and a microprocessor. A signal from the power amplifier is routed by the forward path to be transmitted while a portion of the signal to be transmitted is routed back to the power amplifier via the feedback path. The microprocessor applies phase training signals to the forward path. The microprocessor uses the phase training signals to determine the amount of delay in the linearizer circuit and alters the frequency position of poles and zeros in the linearizer circuit to compensate for the delay. The gain of the linearizer circuit is also altered by the microprocessor depending on the measured delay.

公开(公告)号：GB2466072A

公开(公告)日：2010-06-16

申请号：GB0822730

申请日：2008-12-12

Applicant: MOTOROLA INC

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

IPC: H03F1/32

Abstract: Loop delay in a Cartesian feedback linearised transmitter is computed during a training episode from the settings of the phase shifter 242 required to achieve phase quadrature balance at two frequencies. The pole and zero frequencies of the loop filters 206,209, and the DC loop gain, are then adapted in dependence on the loop delay to maintain stability of the Cartesian loop while minimizing adjacent channel power. If the delay is found to be excessive the transmitter bandwidth may be reduced or the transmitter may be operated in an open loop mode. Improved loop stability allows a Cartesian loop transmitter to be used for broadband signals such as LTE (Long Term Evolution), WiMax, WCDMA and EDGE.

公开(公告)号：GB2403086B

公开(公告)日：2005-07-20

申请号：GB0313928

申请日：2003-06-17

Applicant: MOTOROLA INC

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

IPC: H03F1/32 ,  H03F1/34 ,  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.

公开(公告)号：WO2010068604A3

公开(公告)日：2010-10-21

申请号：PCT/US2009067051

申请日：2009-12-08

Applicant: MOTOROLA INC ,  BEN-AYUN MOSHE ,  BEN-SALMON AVI ,  GROSSMAN OVADIA ,  ROZENTAL MARK

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

IPC: H03L7/08

CPC classification number: H03F1/32 ,  H03F1/34 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/57 ,  H04B1/0475 ,  H04B2001/0433

Abstract: An integrated circuit includes a linearizer circuit in which excessive delay is compensated. The linearizer circuit includes a power amplifier, forward and feedback paths, and a microprocessor. A signal from the power amplifier is routed by the forward path to be transmitted while a portion of the signal to be transmitted is routed back to the power amplifier via the feedback path. The microprocessor applies phase training signals to the forward path. The microprocessor uses the phase training signals to determine the amount of delay in the linearizer circuit and alters the frequency position of poles and zeros in the linearizer circuit to compensate for the delay. The gain of the linearizer circuit is also altered by the microprocessor depending on the measured delay.

Abstract translation: 集成电路包括其中补偿过度延迟的线性化电路。 线性化电路包括功率放大器，正向和反馈路径以及微处理器。 来自功率放大器的信号由正向路径路由被发送，而待传输的信号的一部分经由反馈路径被路由回功率放大器。 微处理器向前向路径施加相位训练信号。 微处理器使用相位训练信号来确定线性化电路中的延迟量，并改变线性化电路中的极点和零点的频率位置以补偿延迟。 线性化电路的增益也由微处理器根据测量的延迟而改变。