The former Rotherham United and Leicester City man joins as a free agent having left SkyBet League Two side Coventry City last month.
He had caught the eyes of Sky Blues management during a successful pre-season trial.
At ease either at the heart of defence or right-back, Pearson has also featured for Peterborough United and Wrexham.
He’s available for a debut, if selected, against Deeping in tomorrow’s Emirates FA Cup tie.
He commented: “I’m looking forward to it and it will be good to get playing again.
“The FA Cup is always something good to be a part of and we’re looking forward to going up there and, hopefully, coming away with a win to get into the next round.
“Everyone looks forward to the FA Cup, it’s a great competition”.