Hi friend,
It is possible to deploy Mesh with single radio APs (AP 92/93), they will work on time sharing basis.
For your ref :
Here is how to provision Mesh portal and point.
Mesh APs need Mesh cluster and Mesh Radio profiles addition to other profiles(VAP,SSID and AAA)
Step 1 : Configure Mesh Cluster profile, specify MSSID and priority of the cluster
Step 2 : Configure Mesh Radio profile ( Default profile is enough)
Step 3 : Map these profiles to the AP-group which you want to provision
Step 4 : While provisioning the AP, select the Mesh role ( Portal/Point) as shown bellow.
You can refer Aruba User guide for complete feature configuration.
http://www.arubanetworks.com/techdocs/ArubaOS_63_Web_Help/Web_Help_Index.htm#ArubaFrameStyles/Mesh/Mesh.htm
Please feel free for any further help on this.