Communications Blockset

Signal Transmission

The AWGN Channel block, from the Channels library, simulates transmission over a noisy channel. The parameters for the block are set in the mask as follows:

• The Mode parameter for this block is set to Signal to noise ratio (Es/No) mode.
• The Es/No parameter is set to 4 dB. This value typically is changed from one simulation run to the next.
• The preceding modulation block generates unit power signals, so the Input signal power is set to 1 watt.
• The Symbol period is set to 0.75 seconds because the code has rate 3/4.

See Transmitting Along a Noisy Channel for details.

Puncturing

Demodulation