公开(公告)号：US20040127173A1

公开(公告)日：2004-07-01

申请号：US10331837

申请日：2002-12-30

Applicant: Motorola, Inc.

Inventor： Gustavo Leizerovich

IPC: H04B001/02 ,  H04B001/04 ,  H01Q011/12

CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/34 ,  H03F3/24 ,  H04B2001/0433 ,  H04B2001/045

Abstract: A system and method for providing a highly efficient linear transmitter compatible with a radio capable of operating in one of several modes. In a normal mode of operation, the radio frequency power amplifier (RFPA) runs in envelope tracking mode. Accordingly, the RFPA supply voltage follows the envelope of the linear modulation. In an alternate mode of operation, the supply modulator is locked to a fixed DC voltage. A high efficiency level is maintained in both the normal mode and the alternate mode by using a single agile DC-DC converter to supply the RFPA. The converter input voltage is switched depending on the mode of operation.

Abstract translation: 一种用于提供与能够以多种模式之一操作的无线电装置兼容的高效线性发射机的系统和方法。 在正常操作模式下，射频功率放大器（RFPA）以包络跟踪模式运行。 因此，RFPA电源电压跟随线性调制的包络。 在另一种工作模式下，电源调制器被锁定到固定的直流电压。 通过使用单个敏捷DC-DC转换器来提供RFPA，在正常模式和备用模式下保持高效率水平。 转换器输入电压根据操作模式进行切换。

公开(公告)号：US20040127161A1

公开(公告)日：2004-07-01

申请号：US10334619

申请日：2002-12-31

Applicant: Motorola, Inc.

Inventor： Gustavo Leizerovich ,  David Graham

IPC: H04B017/00

CPC classification number: H04W24/06 ,  H04B17/0085 ,  H04B17/19 ,  H04B17/20 ,  H04B17/318 ,  H04W24/00

Abstract: A method of diagnosing a subscriber unit 100. The method includes steps of generating a probe signal (412) at the subscriber unit (204), broadcasting the probe signal (412) from the subscriber unit (206), tuning a receiver (104) of the subscriber unit to receive the probe signal at the subscriber unit (208), establishing a signal metric for the probe signal (210) and determining whether the receiver (104) is functioning properly based upon the metric of the probe signal (218). In variations, the probe signal (412) includes several frequencies and a frequency generation unit (114) and a determination as to whether the frequency generation unit is operating properly is based upon whether the receiver 104 receives more than one of the several frequencies in the probe signal (220).

Abstract translation: 一种诊断用户单元100的方法。该方法包括以下步骤：在用户单元（204）处生成探测信号（412），从用户单元（206）广播探测信号（412），调谐接收机（104） 以在所述用户单元（208）处接收所述探测信号，建立所述探测信号（210）的信号度量，并且基于所述探测信号（218）的度量确定所述接收机（104）是否正常工作， 。 在变型中，探测信号（412）包括若干频率，频率产生单元（114）以及关于频率产生单元是否正常工作的确定是基于接收机104是否接收到多个频率中的多个频率 探测信号（220）。