MMDS System Overview with Altera Solutions Figure 1 shows the MMDS network block diagram. For details of how an MMDS network operates, go to the MMDS System Overview page. The functional block diagram of the baseband signal processing carried out in the wireless access terminal and wireless modem is shown in Figure 2. Baseband Transceiver Click on the blue blocks in the diagram for more information. The data is piped to the baseband signal processing chain, which carries out the necessary signal processing to make it robust against noise from the air channel.
Reciprocal processing takes place on the receiver side to recover data from the received signal.
With Altera's programmable APEX II architecture, dedicated hardware functionality can be implemented to achieve the required speeds. Comprehensive Core Solution Altera provides comprehensive solutions for baseband signal processing as well as for network interfaces. Mercury devices can recover 8 or 18 clock channels at OC-12 speeds. CDR makes it easy to implement the PHY layer of the network interface. For IP, on the transmit side, PPP packets have to be placed into frames and frame headers added.