Apply various RF impairments to a QAM signal. Observe the effects by using constellation diagrams, time-varying error vector magnitude (EVM) plots, and spectrum plots. Estimate the
Set the bit energy to noise density ratio (Eb/No) for communication links employing channel coding.
Creates a frequency-flat Rayleigh fading channel object and calls it to process a DBPSK signal consisting of a single vector. Bit error rate is computed for different values of the
Illustrates how to change the default Jakes Doppler spectrum of a constructed Rayleigh channel object to a flat Doppler spectrum.
Change the default Jakes Doppler spectrum of a constructed Rician channel object to a Gaussian Doppler spectrum with normalized standard deviation of 0.3, and subsequently display the
Typically, a path gain in a fading channel changes insignificantly over a period of 1/(100fd) seconds, where fd is the maximum Doppler shift. Because this period corresponds to a very large
Pass a QPSK signal through a Rayleigh multipath fading channel. Change the signal bandwidth to observe the impact of the fading channel on the QPSK constellation.
Illustrates how to change the default Jakes Doppler spectrum of a constructed three-path Rayleigh channel object to a cell array of different Doppler spectra, and then change the
Filters input data through a Rayleigh fading channel within a for loop. It uses the small data sets from successive iterations to create an animated effect. The Rayleigh fading channel has
The syntax for viewing and changing Doppler object properties is the same as for the case of channel objects (see Displaying and Changing Object Properties ).
Pass an FSK signal through a Rayleigh multipath fading channel. Change the signal bandwidth to observe the impact of the fading channel on the FSK spectrum.
Plots the power of a faded signal versus sample number. It illustrates the syntax of creating and calling a comm.RayleighChannel fading channel object and the state retention of the channel
This model applies RF impairments to a signal modulated by differential quadrature phase shift keying (DQPSK). To demonstrate and visualize the RF impairments, levels applied in this
Add a phase noise vector and frequency offset vector to a 16-QAM signal. Display the constellation.
The effects that spectral and phase noise have on a 100 kHz sine wave.