Pearce pleased to be eligible for QPR
But the centre-back's red card was rescinded upon appeal earlier this week and Nigel Adkins will be able to call upon Pearce for this weekend's tough trip.
"You've got to give credit to the FA for reviewing it and coming up with the right decision," Pearce said before a training session earlier this week.
"Everybody's talking about video technology these days and I think it would help referees in instances like last weekend's. That decision could have been referred up to a panel watching on a screen up in the stands, and the question of whether I was the last man or not could have been answered there and then.
"It all happens at such a speed, referees have got a very hard job these days. So they could do with some help for decisions like that.
Harry Redknapp's side are in the hunt for a top two spot and the Royals go there looking to upset the odds. "It's a big game on Sunday against QPR, a good team with some really good players," Pearce told Sky Sports.
"We'll all have to be on our toes from start to finish, all on our game if we're to get a result. We need to focus on ourselves, get training right this week and go into the game with positivity.
"We want to move up the table, and be in and around it come the end of the season. Notoriously over the past number of years at this football club, we've come strong in the second half of the season.
"We got off to a decent start this year and if we can do the same again as we have done over the last few years here, we would get ourselves up to where we want to be in the table.