Communications Blockset

Channels

Communication channels introduce noise, fading, interference, and other distortions into the signals that they transmit. Simulating a communication system involves modeling a channel based on mathematical descriptions of the channel. Different transmission media have different properties and are modeled differently. In a simulation, the channel model usually fits directly between the transmitter and receiver, as shown below.

Channel Features of the Blockset

This blockset provides several channel models for binary, real, and complex signals. You can open the Channels library by double-clicking its icon in the main Communications Blockset library (commlib), or by typing

• commchan2
  

at the MATLAB prompt.

This section describes the capabilities of the Channels library's blocks, by considering these channels:

• Additive white Gaussian noise (AWGN) channel
• Rayleigh and Rician fading channels that model real-world mobile communication effects
• Binary symmetric channel (BSC)

Selected Bibliography for Digital Modulation

AWGN Channel