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authorsara <sara.halter@gmx.ch>2021-12-23 23:35:13 +0100
committersara <sara.halter@gmx.ch>2021-12-23 23:35:13 +0100
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+In our semeter thesis, we have built a multipath fading demonstration platform using a software defined radio.
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+Multipath fading is common problem that affects today's wireless devices. Multipath refers to the fact that, when a transmitter radiates a signal, some of the electromagnetic waves do not go straight to the receiver. What happens instead, is that some waves get reflected in the channel, thus taking a longer path to the receiver, and interfere destructively with eachother.
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+This is a block diagram of our platform. The transmitter modulates the data using either QPSK or QAM. We have simulated a channel model with additive white gaussian noise, and multipath fading. The receiver's signal processing chain demodulates the data and computes the empirical bit error rate.
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+Here we have a few pictures of our setup for the measurements. We used two USRP B210 software defined radios with a Rubidium clock generator each.
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+And here's a screenshot of the graphical interface we built to demonstrate the effect of multipath fading. \ No newline at end of file