Base-band Coding

Can someone tell me what type of Base-band Coding is in Canopy system?

For example,in 802.11 series product,It use DSSS. In canopy system,its modulation used 20MHz RF bandwidth(in 10Mbps and 20Mbps),what techonolgy is it used?

Canopy uses a proprietary coding based on a Time Division Duplex modulation (TDD) scheme.