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diff --git a/video/Text b/video/Text new file mode 100644 index 0000000..972f442 --- /dev/null +++ b/video/Text @@ -0,0 +1,9 @@ +In our semeter thesis, we have built a multipath fading demonstration platform using a software defined radio. + +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. + +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. + +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. + +And here's a screenshot of the graphical interface we built to demonstrate the effect of multipath fading.
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