Programmable switched delay encoder

A method of operating a programmable switched delay encoder as both a carrier signal generator and as an associated matched filter is disclosed. A user input specifies which carrier signal is to be generated by a transmitting programmable switched delay encoder and also specifies that the same selected carrier signal to be passed by the receiving programmable switched delay encoder. This user input renders the same feedback waveguides of the transmitting and receiving programmable autoregressive waveguide structures as transmissive, and also renders the same other feedback waveguides above the structures as absorbing, thus configuring both structures in the same way.