US 12,431,926 B2
Cancellation of passive intermodulation from multiple sources
Zohaib Mahmood, Westwood, MA (US); Subramanian Anantharaman Chandrasekarapuram, Bangalore (IN); Srivathsa Acharya, Bangalore (IN); Gopala Krishna Murthy Vemula, Bangalore (IN); and Devika Sunilkumar, Bangalore (IN)
Assigned to MaxLinear, Inc., Carlsbad, CA (US)
Filed by MAXLINEAR, INC., Carlsbad, CA (US)
Filed on Apr. 3, 2023, as Appl. No. 18/295,263.
Claims priority of provisional application 63/362,407, filed on Apr. 3, 2022.
Prior Publication US 2023/0318648 A1, Oct. 5, 2023
Int. Cl. H04B 1/525 (2015.01); H04B 1/04 (2006.01); H04B 1/10 (2006.01); H04B 1/12 (2006.01); H04B 15/00 (2006.01); H04L 25/03 (2006.01)
CPC H04B 1/123 (2013.01) [H04B 1/0475 (2013.01); H04B 1/525 (2013.01); H04L 25/03 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A base station configured for enhanced receiver sensitivity, comprising:
a receiver (Rx) configured to receive an Rx output signal in an Rx band, wherein the Rx output signal has a first passive intermodulation (PIM) source in the Rx band and a second PIM source in the Rx band; and
a processing device configured to:
receive the Rx output signal from the receiver on an Rx path;
receive a crest factor reduction (CFR) output signal from a CFR on a transmit (Tx) path;
identify the first PIM source and the second PIM source based on the Rx output signal and the CFR output signal;
calibrate the CFR output signal based on the first and second PIM sources in the Rx output signal to generate a non-linear actuation (NA) input signal; and
generate an intermodulation distortion signal by using an NA function on the NA input signal.