"We are looking worldwide to try and improve the squad in the January window," said Pardew.
"It is difficult because we have not got the sums that other teams in the Premier League have got.
"The spending in the summer has probably depleted funds to an extent and I was aware of that when I joined, so I have no problem with that.
"We are going to have to try and be clever - and perhaps a bit left field."
Source: Sky Sports