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QPSK signal generation
Comprehend how a QPSK signal is generated. Two bits are mapped to a symbol. Its phase shifts the carrier phase during the symbol duration.
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QPSK transmission
Explore hands-on how a QPSK signal is sent and demodulated. Check the transmission spectrum for different pulse shapers. Vary further parameters like carrier frequency etc.
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QPSK BER for AWGN channel
Explore the bit error rate for QPSK. Adjust Eb/N0 and measure the corresponding BER. Compare it to the analytical bit error probability. Vary the pulse shape - does it have effect on the BER?
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QAM BER for AWGN channel
Analyse the bit error rate of M-QAM over an AWGN channel. Adjust Eb/N0 and the constellation size. Compare the measured BER to the analytical bit error probability.
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QPSK BER - equivalent baseband
Measure the bit error rate for QPSK in high accuracy. Use this experiment to hands-on verify the analytical bit error probability as a function of Eb/N0. This app is optimized for high simulation speed.
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Eye pattern & constellation diagram
Explore how the Eb/N0 ratio affects the eye pattern and the constellation diagram. And how faulty is a transmission system where a terrible looking eye pattern is measured? Learn more about this topic and try the corresponding simulation experiment.
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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 ...
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Pulseshaping
How can transmission signals be kept within the assigned bandwidth? Find out with this tutorial and try out some filter settings on your own.
See also: | QPSK modulator | OQPSK | MSK | MSK (FSK konform) |