US 9,813,089 B2
Digital predistortion linearization for power amplifiers
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); and Hsuanyu Pan, Los Angeles, CA (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Feb. 15, 2017, as Appl. No. 15/433,964.
Application 15/433,964 is a continuation in part of application No. 15/103,256, previously published as PCT/US2015/059583, filed on Nov. 6, 2015.
Claims priority of provisional application 62/076,324, filed on Nov. 6, 2014.
Prior Publication US 2017/0187401 A1, Jun. 29, 2017
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/0475 (2013.01) [H04B 2001/0425 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An RF transmitter module, said transmitter module comprising:
a digital signal processor (DSP) providing a digital signal to be transmitted;
a digital-to-analog converter (DAC) responsive to the digital signal from the DSP and a clock signal from a clock circuit, said DAC converting the digital signal to an analog signal;
a tunable bandpass filter responsive to the analog signal from the DAC and removing frequencies in the analog signal outside of a frequency band of interest; and
a power amplifier responsive to the filtered analog signal from the bandpass filter and amplifying the filtered analog signal, wherein the DSP employs a noise-shaping operation to shape the analog signal from the DAC to remove quantization noise in an immediate vicinity of the analog signal so as to improve signal-to-noise ratio.