Location History:
- Richardson, TX (US) (2009 - 2010)
- San Richardson, TX (US) (2011)
- San Jose, CA (US) (2011 - 2012)
Company Filing History:
Years Active: 2009-2012
Title: Innovations of Qingwen Liu in Wireless Communications
Introduction
Qingwen Liu is a prominent inventor based in San Jose, CA, known for his significant contributions to the field of wireless communications. With a total of 7 patents to his name, Liu has developed innovative technologies that enhance the efficiency and effectiveness of wireless networks.
Latest Patents
One of Liu's latest patents is titled "Hybrid time-spatial multiplexing for wireless broadcast messages through antenna radiation beam synthesis." This invention provides a hybrid time-spatial multiplexing technique for beamforming broadcast messages to mobile stations within a coverage region. The coverage region is divided into multiple segments, allowing mobile stations to be assigned to segments based on their locations. The base station computes beamforming antenna weights to produce a radiation beam pattern directed at each segment, enabling efficient transmission of broadcast messages.
Another notable patent is the "Method for estimating channel response in a wireless communications network based on pilot signals." This method involves estimating channel responses of pilot subcarriers carrying pilot signals, generating pseudo time instances for these subcarriers, and approximating channel responses at these instances. The invention calculates the rate of change in channel response and estimates the channel response of data subcarriers, significantly improving the accuracy of wireless communications.
Career Highlights
Qingwen Liu is currently employed at Cisco Technology, Inc., where he continues to innovate and develop cutting-edge technologies in wireless communications. His work at Cisco has positioned him as a key player in advancing the capabilities of wireless networks.
Collaborations
Liu collaborates with talented coworkers, including Hang Jin and Genyuan Wang, who contribute to the development of innovative solutions in the field.
Conclusion
Qingwen Liu's contributions to wireless communications through his patents and work at Cisco Technology, Inc. highlight his role as a leading inventor in the industry. His innovative techniques are paving the way for more efficient wireless communication systems.