ATM Over MPEG

The simulations of the IB and OOB downstream channels were performed using Matlab 5.1 with the Communications Toolbox from Mathworks Inc.The MPEG2-TS frames were sent over the IB downstream channel at 41.712 Mbps with carrier frequency f_c=100 MHz and the Extended Super Frames (ESF) were sent over the OOB downstream channel at two different bit rates, 3.088 Mbps and 41.712 Mbps, with carrier frequency f_c=100 MHz.

Two types of noise were added to the channels: Additive White Gaussian Noise (AWGN) and burst noise. The Bit Error Rate (BER) and the Cell Loss Ratio (CLR), (i.e. the ratio between the number of ATM cells that are lost due to unrecoverable bit errors and the total number of ATM cells sent over the channel), were computed in two separate cases for each framing method: In the first case only AWGN was added to the channel and in the other case only burst noise was added to the channel. This resulted in five BER functions and five CLR functions, which can be seen in Figure 31 and Figure 32.