Patents by Inventor Pingzhi Fan

Pingzhi Fan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of receiving a transmitted signal over a time-varying channel and receiver thereof
    Patent number: 11943081
    Abstract: There is provided a method of receiving a transmitted signal over a time-varying channel. The method includes: obtaining a received symbol signal in frequency domain based on the transmitted signal; performing a first channel estimation based on the received symbol signal to obtain a plurality of first estimated BEM coefficients; performing a first equalization based on the received symbol signal and the plurality of first estimated BEM coefficients to obtain a plurality of first detected source symbols; and performing one or more rounds of a second channel estimation and a second equalization.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: March 26, 2024
    Assignees: Nanyang Technological University, Southwest Jiaotong University
    Inventors: Xiaobei Liu, Kushal Anand, Yong Liang Guan, Pingzhi Fan
  • METHOD OF RECEIVING A TRANSMITTED SIGNAL OVER A TIME-VARYING CHANNEL AND RECEIVER THEREOF
    Publication number: 20220368569
    Abstract: There is provided a method of receiving a transmitted signal over a time-varying channel. The method includes: obtaining a received symbol signal in frequency domain based on the transmitted signal; performing a first channel estimation based on the received symbol signal to obtain a plurality of first estimated BEM coefficients; performing a first equalization based on the received symbol signal and the plurality of first estimated BEM coefficients to obtain a plurality of first detected source symbols; and performing one or more rounds of a second channel estimation and a second equalization.
    Type: Application
    Filed: October 22, 2020
    Publication date: November 17, 2022
    Inventors: Xiaobei LIU, Kushal ANAND, Yong Liang GUAN, Pingzhi FAN
  • Method for two-level variable chip rate spreading and despreading used in CDMA system
    Patent number: 7272163
    Abstract: This invention involves a two-level variable chip rate spreading and despreading method used in CDMA systems. The total spreading gain is the product of the two level spreading factors. Orthogonal sequences, ZCZ sequences and Pseudo-Noise (PN) sequences can be employed as the first- and second-level spreading codes. By employing the two-level spreading method, the interference existing in the systems can be suppressed efficiently and the system performance can be improved significantly.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: September 18, 2007
    Assignees: The Research Institute of Telecommunications Transmission, Southwest Jiao Tong University
    Inventors: Li Hao, Pingzhi Fan
  • Adaptive interference-free spread-spectrum system employing binary code sequence sets with zero correlation zone properties
    Patent number: 6963600
    Abstract: A direct sequence spread spectrum system consisting of modulator and demodulator wherein the spreading sequence with zero correlation zone properties, and the despreading consists of multiplying the received signal with the same spreading sequence, followed by a low pass filter, decoder and deinterleaver. The bit rate of the spreading sequence for each user is normally much higher than the input encoded data bit rate, and therefore it spreads the system spectrum.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: November 8, 2005
    Assignees: Toyo Communication Equipment Co., Ltd., Daiei Electronics Co., Ltd.
    Inventors: Pingzhi Fan, Naoki Suehiro, Noriyoshi Kuroyanagi
  • Method for two-level variable chip rate spreading and despreading used in CDMA system
    Publication number: 20020154680
    Abstract: This invention involves a two-level variable chip rate spreading and despreading method used in CDMA systems. The total spreading gain is the product of the two level spreading factors. Orthogonal sequences, ZCZ sequences and Pseudo-Noise (PN) sequences can be employed as the first- and second-level spreading codes. By employing the two-level spreading method, the interference existing in the systems can be suppressed efficiently and the system performance can be improved significantly.
    Type: Application
    Filed: February 27, 2002
    Publication date: October 24, 2002
    Applicant: The Research Institute of Telecommunications Transmission
    Inventors: Li Hao, Pingzhi Fan