
Matched filter in digital communications
In this scenario, a pulse is sent and shall be detected at the receiver. It might represent a symbol for digital transmission or a radar pulse. The received pulse might be ...

Twopath channel
A direct path and a reflected path set up a simple multipath propagation environment. Determine the channel impulse response and transfer function!

QAM BER for AWGN channel
Analyse the bit error rate of MQAM over an AWGN channel. Adjust E_{b}/N_{0} and the constellation size. Compare the measured BER to the analytical bit error probability.

QPSK BER  equivalent baseband
Measure the bit error rate for QPSK in high accuracy. Use this experiment to handson verify the analytical bit error probability as a function of E_{b}/N_{0}. This app is optimized for high simulation speed.

OFDM transmission stepbystep
Understand OFDM and process each step using example values. A pilot sequence initializes the equalizer. Transmit an OFDM symbol and detect ISIfree.

Guard interval and ISIfree OFDM transmission
Explore how OFDM implements an ISIfree transmission and verify the required guard interval length for a multipath channel. Modify the delay spread of a fading channel and check the received signal points for ISI.

OFDM BER vs Eb/N0 in AWGN channel
Verify the theoretical BER of IEEE 802.11ac OFDM setups with simulation results! Why does OFDM show an increased BER compared to single carrier systems in AWGN channel?

Peaktoaverage power ratio of OFDM systems
Why do OFDM systems show a high peaktoaverage power ratio? How does the PAPR depend on the number of subcarriers? Has the underlying MQAM constellation size any impact?

Fast Fourier transform (FFT)  power invariant
The power of the FFT output signal differs from the input signal power due to an asymmetry in the FFT / IFFT definitions. This FFT variant keeps input and output signal powers equal.

Inverse fast Fourier transform (IFFT)  power invariant
The power of the IFFT output signal differs from the input signal power due to an asymmetry in the FFT / IFFT definitions. This IFFT variant keeps input and output signal powers equal.
See also:  Digital baseband transmission  QAM  QAM equalized  Tworay multipath propagation  Fast fading demonstration  Extended Pedestrian A model  Doppler shift in wireless communications  2 paths  Doppler spread  10 paths  Jakes' spectrum  Timevariant multipath propagation  FFT calculator (power invariant)  IFFT calculator (power invariant)  OFDM BER for AWGN 