Patents by Inventor Balachander Narasimhan

Balachander Narasimhan 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).

  • Patent number: 9912499
    Abstract: An electronic device for a wireless communication system is described. The electronic device comprises: a receiver configured to receive a modulated signal on a communication channel; and a processor, coupled to the receiver and configured to: process the received modulated signal; identify a communication channel characteristic based on the processed received modulated signal; select an equalizer having a first set of equalization coefficients based on the identified communication channel characteristic, wherein the first set of equalization coefficients is selected from a plurality of equalization coefficients, each of the plurality of equalization coefficients being associated with different communication channel characteristics; equalize the processed received modulated signal on the communication channel using the selected equalizer; and detect the equalized received modulated signal.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: March 6, 2018
    Assignee: MediaTek, Inc.
    Inventors: Balachander Narasimhan, Charles Chien, Qiang Zhou, Chih-Yuan Lin, Cheng-Chou Zhan, Bao-Chi Peng
  • Patent number: 9768984
    Abstract: An electronic device for a wireless communication system is described. The electronic device comprises: a receiver configured to receive a modulated signal on a communication channel; and a processor, coupled to the receiver and configured to: process the received modulated signal; identify a communication channel characteristic based on the processed received modulated signal; select an equalizer having a first set of equalization coefficients based on the identified communication channel characteristic, wherein the first set of equalization coefficients is selected from a plurality of equalization coefficients, each of the plurality of equalization coefficients being associated with different communication channel characteristics; equalize the processed received modulated signal on the communication channel using the selected equalizer; and detect the equalized received modulated signal.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: September 19, 2017
    Assignee: MediaTek, Inc.
    Inventors: Balachander Narasimhan, Charles Chien, Qiang Zhou, Chih-Yuan Lin, Cheng-Chou Zhan, Bao-Chi Peng
  • Publication number: 20170104613
    Abstract: An electronic device for a wireless communication system is described. The electronic device comprises: a receiver configured to receive a modulated signal on a communication channel; and a processor, coupled to the receiver and configured to: process the received modulated signal; identify a communication channel characteristic based on the processed received modulated signal; select an equalizer having a first set of equalization coefficients based on the identified communication channel characteristic, wherein the first set of equalization coefficients is selected from a plurality of equalization coefficients, each of the plurality of equalization coefficients being associated with different communication channel characteristics; equalize the processed received modulated signal on the communication channel using the selected equalizer; and detect the equalized received modulated signal.
    Type: Application
    Filed: December 20, 2016
    Publication date: April 13, 2017
    Inventors: Balachander Narasimhan, Charles Chien, Qiang Zhou, Chih-Yuan Lin, Cheng-Chou Zhan, Bao-Chi Peng
  • Publication number: 20160261436
    Abstract: An electronic device for a wireless communication system is described. The electronic device comprises: a receiver configured to receive a modulated signal on a communication channel; and a processor, coupled to the receiver and configured to: process the received modulated signal; identify a communication channel characteristic based on the processed received modulated signal; select an equalizer having a first set of equalization coefficients based on the identified communication channel characteristic, wherein the first set of equalization coefficients is selected from a plurality of equalization coefficients, each of the plurality of equalization coefficients being associated with different communication channel characteristics; equalize the processed received modulated signal on the communication channel using the selected equalizer; and detect the equalized received modulated signal.
    Type: Application
    Filed: January 7, 2016
    Publication date: September 8, 2016
    Inventors: Balachander Narasimhan, Charles Chien, Qiang Zhou, Chih-Yuan Lin, Cheng-Chou Zhan, Bao-Chi Peng
  • Patent number: 9118535
    Abstract: A method of configuring at least one frequency dependent (FD), in-phase/quadrature (I/Q), imbalance compensation filter within a radio frequency (RF) module is described. The method includes applying an input signal to an input of the RF module, receiving a filtered I-path signal for the RF module and deriving at least one I-path filtering estimate value therefrom, receiving a filtered Q-path signal for the RF module and deriving at least one Q-path filtering estimate value therefrom, and configuring the at least one FD I/Q imbalance compensation filter based at least partly on at least one ratio between the derived I-path and Q-path filtering estimate values.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: August 25, 2015
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Balachander Narasimhan, Charles Chien, Sheng-Hong Yan, Paul Cheng Po Liang
  • Publication number: 20140376420
    Abstract: A communications apparatus has a transmitter path and a training signal generator. The transmitter path is arranged for transmitting a transmission signal. The training signal generator is arranged for generating a training signal in a receiver band, and injecting the training signal to the transmitter path. The training signal is utilized to obtain an accurate estimation of the channel which helps to suppress transmission noise comprised in at least one received signal of the communications apparatus, and the transmission noise is generated by the transmitter path. Specifically, the communications apparatus further has a receiver path and a transmission noise suppression device. The receiver path is arranged for receiving a received signal. The transmission noise suppression device is arranged for receiving the training signal, and processing the received signal to suppress transmission noise comprised in the received signal according to at least the training signal.
    Type: Application
    Filed: December 19, 2013
    Publication date: December 25, 2014
    Applicant: MediaTek Singapore Pte. Ltd.
    Inventors: Qiang Zhou, Balachander Narasimhan, Charles Chien, Jonathan Richard STRANGE, Paul Cheng Po Liang
  • Publication number: 20140273907
    Abstract: A method of configuring at least one frequency dependent (FD), in-phase/quadrature (I/Q), imbalance compensation filter within a radio frequency (RF) module is described. The method includes applying an input signal to an input of the RF module, receiving a filtered I-path signal for the RF module and deriving at least one I-path filtering estimate value therefrom, receiving a filtered Q-path signal for the RF module and deriving at least one Q-path filtering estimate value therefrom, and configuring the at least one FD I/Q imbalance compensation filter based at least partly on at least one ratio between the derived I-path and Q-path filtering estimate values.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: MediaTek Singapore Pte. Ltd.
    Inventors: Balachander Narasimhan, Charles Chien, Sheng-Hong Yan, Paul Cheng Po Liang