Here is a step by step 'how to' for OpenWRT Luci enabled systems.
https://app.box.com/s/6hx9qhi84hr9l3kqxc3m (pdf)
It includes the establishment of a 150n wireless LAN link between two TP-Link 703n routers loaded with an Open WRT version ROOter.
It includes a throughput test of the link, over 10m separation in a domestic situation, with 80Mbps transfer speeds achieved.
A pretty cheap wireless LAN.