公开(公告)号：US20160080119A1

公开(公告)日：2016-03-17

申请号：US14484523

申请日：2014-09-12

Applicant: QUALCOMM Incorporated

Inventor： Rema Vaidyanathan ,  Prasad Srinivasa Siva Gudem ,  Vijay Chellappa ,  Chalin Chac Lee ,  Li Gao ,  David Coronel

IPC: H04L1/20 ,  H04L1/24 ,  H03L7/06 ,  H04B1/10 ,  H04W72/04 ,  H04L7/033 ,  H04B3/46

CPC classification number: H04L1/206 ,  H03L7/06 ,  H04B3/46 ,  H04B17/102

Abstract: A method and apparatus for self-testing a GSM/EDGE communications device. An embodiment provides a method of measuring transmit power. A receive phase locked loop (PLL) is inserted into a feedback receiver local oscillator mixer. The receive PLL is then tuned to a local oscillator frequency. Once the tuning is complete, an I and a Q signal are captured using a channel of the feedback receiver. After capture, a I2+Q2 sum is computed, measuring the transmit power. The feedback receiver automatic gain control (AGC) may be used to determine transmit power in place of I2+Q2. The apparatus includes: a modem assembly, a power control assembly, a power amplifier, a duplexer, a coupler and a switch. The power control assembly further includes a first PLL and first and second mixers. The second mixer is connected to a feedback low noise amplifier and receives input from a feedback receiver PLL.

Abstract translation: 一种用于自测试GSM / EDGE通信设备的方法和装置。 实施例提供了一种测量发射功率的方法。 接收锁相环（PLL）插入到反馈接收机本地振荡器混频器中。 然后将接收PLL调谐到本地振荡器频率。 调谐完成后，使用反馈接收器的通道捕获I和Q信号。 捕获后，计算I2 + Q2和，测量发射功率。 反馈接收机自动增益控制（AGC）可用于确定发射功率代替I2 + Q2。 该装置包括：调制解调器组件，功率控制组件，功率放大器，双工器，耦合器和开关。 功率控制组件还包括第一PLL和第一和第二混频器。 第二混频器连接到反馈低噪声放大器，并从反馈接收机PLL接收输入。