That model supports both controller based and autonomous. Best way is to look at the download section to see what available images are listed. Here is a link to your model AP.
https://software.cisco.com/download/release.html?mdfid=284291905&flowid=79969&softwareid=284180979&release=15.3.3-JD&relind=AVAILABLE&rellifecycle=ED&reltype=latest
-Scott
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-Scott
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