By Saqib Iqbal Ahmed

NEW YORK (Reuters) -The U.S. dollar edged higher against a basket of currencies on Tuesday as traders awaited a raft of central bank interest rate decisions this week, including one by the Federal Reserve on Wednesday.

The dollar index, which measures the currency against six major counterparts, was up 0.05% at 105.13, not far from the six-month high of 105.43 touched on Thursday. The index rose for its ninth straight week last week, its longest winning streak in nearly a decade.

Resilient U.S. growth has fueled a rebound in the dollar in recent weeks though the rally will likely be tested by a gauntlet of data and Wednesday's Fed interest rate decision.

The dollar came under pressure against the euro earlier on Tuesday following a report that indicated the European Central Bank may soon start discussing how to drain some of the excess liquidity in the banking system, while the yen wallowed near 10-month lows against the dollar.

A Reuters report on Monday citing six sources said the debate over the multi-trillion-euro pool of excess liquidity sloshing around banks was likely to start next month.

The excess cash dulls the impact of the ECB's rate hikes by reducing competition for deposits and results in hefty interest payments - and ensuing losses - by some central banks.

The euro was 0.1% lower at $1.06805, after rising as high as $1.0718 earlier in the session.

"If we look at the price action, it has generally been peripheral stories that have weighed on the dollar, like the minimum reserves leak out of the ECB yesterday," said Simon Harvey, head of FX analysis at Monex Europe.

"This will do little to weigh on the dollar when the more dominant narratives of U.S. exceptionalism and a more credible higher for longer message from the Fed come back into play," Harvey said.

Traders expect the Fed to keep rates on hold at its upcoming meeting, according to the CME FedWatch tool, though focus will be on the central bank's forward guidance.

Still, with the dollar having rallied over the last few weeks it may take a fresh catalyst to lift it higher.

"The Fed may not sound dovish but markets may need quite a lot more supportive evidence to push an expensive looking USD even higher at this point," Shaun Osborne, chief currency strategist at Scotia Bank, said in a note.

The Australian dollar was 0.31% higher after minutes of the Reserve Bank of Australia's latest policy meeting signaled that there would be more interest rate hikes to come.

The Canadian dollar was trading 0.35% higher after having strengthened to a six-week high against its U.S. counterpart on Tuesday, as investors raised bets on additional interest rate hikes by the Bank of Canada following hotter-than-expected inflation data.