US 12,003,352 B2
Techniques for generating a PAM eye diagram in a receiver
Peng Li, Palo Alto, CA (US); Masashi Shimanouchi, San Jose, CA (US); and Hsinho Wu, Santa Clara, CA (US)
Assigned to Altera Corporation, San Jose, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Sep. 23, 2020, as Appl. No. 17/029,445.
Prior Publication US 2021/0006439 A1, Jan. 7, 2021
Int. Cl. H04L 25/03 (2006.01); H03M 1/12 (2006.01); H04B 10/54 (2013.01); H04B 10/69 (2013.01); H04L 27/01 (2006.01)
CPC H04L 25/03031 (2013.01) [H03M 1/1215 (2013.01); H04B 10/541 (2013.01); H04B 10/6971 (2013.01); H04L 25/03267 (2013.01); H04L 27/01 (2013.01); H04L 2025/0349 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
transmitting a transmission signal from a transmitter;
receiving the transmission signal by a first receiver and a second receiver;
digitizing the transmission signal by the first receiver at a first sampling frequency;
digitizing the transmission signal by the second receiver at a second sampling frequency that is less than or equal to the first sampling frequency;
generating a pulse amplitude modulation (PAM) eye diagram for a plurality of transmission amplitudes of the transmission signal by the second receiver using digitized signals of the transmission signal digitized by the first and the second receivers; and
adjusting a first equalizer setting of a first equalizer of the first receiver using eye-opening information of the PAM eye diagram to compensate for transmission loss of the transmission signal.