Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Situational Awareness
Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented
Environment - Non Weather Related; Human Factors
On the arrival into MIA we started picking up strong wake from the aircraft in front of us which I believe was a heavy.  There was no wind and looked as if we were going to be in the wake for an extended period of time.  So I went to vertical speed to stay above the wake.  Taking a quick glance at the arrival they were all at or above altitude constraints.  A couple minutes later thinking I was well above all constraints I noticed on the navigation display an amber circle.  At that moment I realize I was below an 8;000 feet altitude constraint and was at 7;600 feet.  I disconnected the autopilot to level off. About the same time ATC asked about our attitude and gave us a heading and lower altitude.  Fortunately; there was no traffic below us.[Caused by] wrongfully thinking by slowing my descent I was going to be at or above all my altitude constraints and some weather near the arrival that created a distraction.
A321 pilot reported overshooting a crossing restriction on arrival into MIA; citing concern about possible wake turbulence as a contributing factor.