Nah, I don't think so... they were using Matrix in a vague sense they may as well copyright the word 'computer'
Seriously, though. Watch the Dr. Who Story 'The Deadly Assassin' and you will see what I mean. Also 'The Invasion of Time' and the last two episodes of 'Trial of a Time Lord'. The Gallifreyans central computer, called the Matrix, is amazingly similar. Only its function is different.