A new transmultiplexer scheme
Gianfranco Cariolaro, Simona Cucchi, Francesco Molo · Proceedings of the IEEE · 1982
A conceptually simple scheme is derived for the digital TDM-FDM conversion (transmultiplexer) of N voice channels. It simply consists of 1) a polyphase filter, and 2) a modulator with carrier W2Nt2= exp(j2πt2/2N), where t is the discrete time.