  PSR J1528-3146 is a 60.8 ms pulsar orbiting a heavy white dwarf (WD)
companion, with an orbital period of 3.18 d. This work aimed at characterizing
the pulsar's astrometric, spin and orbital parameters by analyzing timing
measurements conducted at the Parkes, MeerKAT and Nan\c{c}ay radio telescopes
over almost two decades. The measurement of post-Keplerian perturbations to the
pulsar's orbit can be used to constrain the masses of the two component stars
of the binary, and in turn inform us on the history of the system. We analyzed
timing data from the Parkes, MeerKAT and Nan\c{c}ay radio telescopes collected
over $\sim$16 yrs, obtaining a precise rotation ephemeris for PSR J1528-3146. A
Bayesian analysis of the timing data was carried out to constrain the masses of
the two components and the orientation of the orbit. We further analyzed the
polarization properties of the pulsar, in order to constrain the orientations
of the magnetic axis and of the line-of-sight with respect to the spin axis. We
measured a significant rate of advance of periastron for the first time, and
put constraints on the Shapiro delay in the system and on the rate of change of
the projected semi-major axis of the pulsar's orbit. The Bayesian analysis
yielded measurements for the pulsar and companion masses of respectively $M_p =
1.61_{-0.13}^{+0.14}$ M$_\odot$ and $M_c = 1.33_{-0.07}^{+0.08}$ M$_\odot$
(68\% C.L.), confirming that the companion is indeed massive. This companion
mass as well as other characteristics of PSR J1528$-$3146 make this pulsar very
similar to PSR J2222-0137, a 32.8 ms pulsar orbiting a WD whose heavy mass
($\sim 1.32$ M$_\odot$) was unique among pulsar-WD systems until now. Our
measurements therefore suggest common evolutionary scenarios for PSRs
J1528-3146 and J2222-0137.
