US 12,323,174 B2
Amplitude-to-phase error correction in a transceiver circuit
Nadim Khlat, Cugnaux (FR)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Aug. 18, 2022, as Appl. No. 17/890,538.
Claims priority of provisional application 63/245,151, filed on Sep. 16, 2021.
Prior Publication US 2023/0079153 A1, Mar. 16, 2023
Int. Cl. H04B 1/04 (2006.01); H04B 1/525 (2015.01)
CPC H04B 1/0475 (2013.01) [H04B 1/525 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A transceiver circuit comprising:
a delay equalizer circuit configured to:
receive a time-variant input vector modulated for transmission in a plurality of transmission frequencies, the time-variant input vector is associated with a time-variant amplitude and a variable group delay that varies in accordance with the time-variant amplitude in each of the plurality of transmission frequencies;
equalize the time-variant input vector to thereby convert the variable group delay in each of the plurality of transmission frequencies into a respective constant group delay across the time-variant amplitude such that a respective variable phase error associated with the variable group delay in each of the plurality of transmission frequencies can become linearly related; and
generate a delay-equalized vector associated with the time-variant amplitude and having the respective constant group delay in a respective one of the plurality of transmission frequencies; and
a phase correction circuit configured to:
determine a reference phase offset corresponding to a reference frequency selected among the plurality of transmission frequencies;
superimpose the reference phase offset on the respective variable phase error of the respective one of the plurality of transmission frequencies to thereby determine a phase correction term configured to correct the respective variable phase error in the respective one of the plurality of transmission frequencies; and
apply the determined phase correction term to the delay-equalized vector to generate a delay-phase-equalized vector.