Qualcomm Incorporated

Alireza Kheirkhahi

Maarten Menzo Wentink

Vincent Knowles Jones, Iv

Didier Johannes Richard Van Nee

Albert Van Zelst

Ali Agah

Shahram Abdollahi-Alibeik

Todd Daniel Antes

Lalitkumar Nathawad

MeeLan Lee

Simon Jan Brand

Patrick Kelliher

Ke Gong

Ayse Yesilyurt

In an aspect a transceiver is provided. The transceiver may include a plurality of local oscillator (LO) generators configured to generate a plurality of LO signals, respectively, for mixing with one or more communication signals. The transceiver also includes a first synthesizer configured to generate a first reference signal and a second synthesizer configured to generate a second reference signal. The transceiver also includes a distribution circuit. The distribution circuit is configured to switch an input to at least one of the LO generators between the first and second reference signals for tuning each of the at least one of the LO generators between two different LO frequencies and to input to the other ones of the LO generators the first reference signal for tuning each of the other ones of the LO generators to an LO frequency.

Techniques for supporting multiple bandwidth modes

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.

Systems and methods for active interference cancellation to improve coexistence

Growing community of inventors

San Jose, CA, United States of America

Alireza Kheirkhahi