If one mixes ATDMA and S-TDMA, is it necessary to send duplicate maps in the downstream?
A. It depends on whether you wish to run ATDMA at a wider channel width than the TDMA signal. This would have ATDMA modems that run at 6.4 MHz and TDMA modems that run at 3.2 MHz on the same center frequency: a rather poor use of upstream spectrum, and the throughput is not than advantageous. If ATDMA and TDMA channels are the same channel width (3.2 MHz), then the A-LONG and A-SHORT grants have their own modulation profiles, and they can run within the same maps.
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