US 11,855,830 B2
Image rejection compensation method for I/Q down-conversion in radio frequency receivers, corresponding circuit, radio frequency receiver device and computer program product
Alessandro Barbieri, Pozzuolo Martesana (IT); and Fabio Dell'Orto, Lissone (IT)
Assigned to STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed by STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed on Dec. 15, 2020, as Appl. No. 17/123,003.
Claims priority of application No. 102019000024298 (IT), filed on Dec. 17, 2019.
Prior Publication US 2021/0194746 A1, Jun. 24, 2021
Int. Cl. H04L 27/38 (2006.01); H04L 27/36 (2006.01); H04L 27/26 (2006.01); H04L 27/20 (2006.01)
CPC H04L 27/364 (2013.01) [H04L 27/2089 (2013.01); H04L 27/26412 (2021.01); H04L 27/368 (2013.01); H04L 27/3863 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving an input signal comprising at least one sequence of input data samples separated by a sampling period therebetween, the input signal comprising a desired signal component and an interfering signal component superimposed thereon;
applying interfering component estimation processing to said input signal obtaining as a result a filtered signal comprising a sequence of filtered data samples; and
subtracting said filtered signal from said input signal and obtaining as a result an output signal comprising a sequence of output data samples,
wherein said interfering component estimation processing comprises:
a) applying conjugating processing to said input signal, providing a conjugated version of said input signal;
b) computing of at least one adaptive signal processing coefficient value; and
c) applying adaptive signal processing to said conjugated version of said input signal using at least one adaptive signal processing coefficient,
wherein said computing at least one adaptive signal processing coefficient value comprises:
i) performing correlation processing between said sequence of output data samples of the output signal and a conjugated version of said sequence of output data samples of the output signal and obtaining as a result a sequence of estimates of residual correlation; and
ii) applying integration processing to said sequence of estimates of residual correlation provided, said integration processing using an integration step parameter and at least one starting point parameter, obtaining at least one computed adaptive signal processing coefficient as a result of applying said integration processing.