R&S®SMJ100A Vector Signal Generator
Versatility in signal generation
Full power in the baseband III
The IEEE 802.16 standard – also referred to as WiMAX – is of broad interest as a wireless bridge for the last mile. The R&S®SMJ100A supports 802.16e, including channel coding. Both versions, OFDM and OFDMA, are included. The R&S®SMJ100A offers various uplink and downlink duplex capabilities, including both FDD and TDD. The user interface provides separate operating menus for the OFDM and OFDMA modes. OFDM has a defined FFT length of 256, so that only one set of subchannels is used simultaneously; what’s of interest here are the different data bursts with the individual subcarrier modulations. On the other hand, OFDMA has a considerably larger FFT size of 2048, so that different subchannel groups can be assigned to different users, which is reflected in the subchannel map of the OFDMA configuration.
OFDM and OFDMA configuration in the WiMAX system
