Rangers have been linked with Hearts winger Walker for much of the transfer window to date, but doing a deal has been difficult.
Rangers have struggled to meet Hearts’ asking price for the 24-year-old attacker, with multiple bids being rejected.
And when asked whether Rangers did want to sign Walker, Caixinha said: “I said previously that I’m not going to talk about players from other teams.
“We know what we want and we know the hard work and sacrifice that the chairman and the board are making. We know our targets and we know we still have a month until the end of the transfer window.”
Rangers have made a number of alterations to their squad this summer and after a disastrous defeat in the Europa League, Caixinha’s plan finally appears to be coming together.
Rangers have started to improve in pre-season, and beat Sheffield Wednesday 2-0 in their most recent outing.
Confidence is starting to build again at Ibrox, as the new season edges closer.
Rangers begin their league campaign next weekend, when they take on Motherwell at Fir Park.