Multiplexing Scheme for 4×2, 8×2 and 16×2 Adjustable Capacity Digital Microwave Links

In this paper we describe structure of digital multiplex suitable for variable capacity digital microwave links with QAM modulations. The multiplex should transmit, E1 tributaries, voice service channels, channel for remote monitoring and control and at least one V35/Ethernet data channel. Ethernet channels capacity could be enlarged at expense of E1 tributaries. Special attention is paid to cost effective usage of FPGA.