公开(公告)号：US20130272175A1

公开(公告)日：2013-10-17

申请号：US13747339

申请日：2013-01-22

Applicant: QUALCOMM INCORPORATED

Inventor： Masoud ZARGARI ,  Shahram ABDOLLAHI-ALIBEIK

IPC: H04L5/14

CPC classification number: H04L5/14 ,  H04B1/50 ,  H04B17/11 ,  H04B17/14 ,  H04B17/21 ,  H04L27/368

Abstract: A frequency-division duplexing (FDD) transceiver includes a first mixer to up-convert a transmit signal and a first switch, coupled to the first mixer, to selectively provide a transmit local oscillator signal or a receive local oscillator signal to the first mixer. The transmit local oscillator signal has a first frequency and the receive local oscillator signal has a second frequency distinct from the first frequency. The FDD transceiver also includes a second mixer to down-convert a receive signal and a second switch, coupled to the second mixer, to selectively provide the transmit local oscillator signal or the receive local oscillator signal to the second mixer.

Abstract translation: 频分双工（FDD）收发器包括耦合到第一混频器的发送信号上变频的第一混频器和第一开关，以选择性地向第一混频器提供发送本地振荡器信号或接收本地振荡器信号。 发送本地振荡器信号具有第一频率，并且接收本地振荡器信号具有与第一频率不同的第二频率。 FDD收发器还包括第二混频器以对接收信号进行下变频和耦合到第二混频器的第二开关，以选择性地向第二混频器提供发送本地振荡器信号或接收本地振荡器信号。

公开(公告)号：US20140099893A1

公开(公告)日：2014-04-10

申请号：US13645346

申请日：2012-10-04

Applicant: QUALCOMM INCORPORATED

Inventor： Alireza KHEIRKHAHI ,  Shahram ABDOLLAHI-ALIBEIK ,  Lalitkumar NATHAWAD ,  Ke GONG ,  Ali AGAH

IPC: H04W4/00

CPC classification number: H04W4/80 ,  H04B1/525 ,  H04J11/0023

Abstract: This disclosure describes techniques for providing active interference cancellation in a wireless communication system having a Bluetooth transmit chain and a WLAN receive chain. A signal sampled from the Bluetooth transmit chain is gain and phase adjusted to offset interference in the WLAN receive chain. A quadrature phase shifter may be used to generate quadrature components of the sampled signal that are selectively combined to achieve a desired phase adjustment. The phase shifter may be stabilized by a variable capacitor. These techniques may be extended to MIMO systems.

Abstract translation: 本公开描述了在具有蓝牙发射链和WLAN接收链的无线通信系统中提供主动干扰消除的技术。 从蓝牙发射链采样的信号是增益和相位调整以抵消WLAN接收链中的干扰。 正交移相器可以用于产生被选择性地组合以获得期望的相位调整的采样信号的正交分量。 移相器可以由可变电容器稳定。 这些技术可以扩展到MIMO系统。