An ad-hoc network with a sender, a destination and a third station act-

ing as a relay is analysed. The channels are modelled containing thermal

noise, Rayleigh fading and path loss. Di® erent combining methods and di-

versity protocols are compared. The amplify and forward protocol shows a

better performance than the decode and forward protocol, unless an error

correcting code is simulated. To combine the incoming signals the chan-

nel quality should be estimated as well as possible. Information about the

average quality shows nice bene¯ ts, and a rough approximation about the

variation of the channel quality increases the performance even more.