The South Africa-born batsman was greeted with a barrage of tabloid criticism after arriving in Brisbane, venue for the first Ashes Test starting Thursday.
Pietersen told a news conference he enjoys the lively and combative cricket coverage but said his confidence has been confused with arrogance.
Pietersen says "I've got to be confident in my ability. As a South African coming to England, I had to really fight some tough battles and had to be single minded in achieving what I've had to achieve -- I can't help people thinking I'm arrogant."