The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2017
Filed:
Feb. 15, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Timothy J. Talty, Beverly Hills, MI (US);
Emilio A. Sovero, Thousand Oaks, CA (US);
Mohiuddin Ahmed, Moorpark, CA (US);
Cynthia D. Baringer, Piedmont, CA (US);
James Chingwei Li, Simi Valley, CA (US);
Yen-Cheng Kuan, Los Angeles, CA (US);
Hsuanyu Pan, Los Angeles, CA (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A cellular radio architecture that includes an RF transmitter having a digital signal processor, a digital-to-analog converter (DAC) module that converts digital bits from the processor to an analog signal, a tunable bandpass filter that removes frequencies in the analog signal outside of a frequency band of interest, and a power amplifier that amplifies the filtered analog signal. The architecture also includes a calibration feedback device that receives the amplified analog signal and provides a feedback signal to the processor for calibrating the digital signal to provide amplified amplifier pre-distortion. The processor employs a noise-shaping operation to shape the analog signal from the DAC to remove quantization noise in an immediate vicinity of the signal to improve signal-to-noise ratio, performs an infinite impulse response process to lower a noise floor in the analog signal, and provides pre-distortion of the digital signal to compensate for non-linearties of the power amplifier.