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diff --git a/doc/poster/paragraphs.txt b/doc/poster/paragraphs.txt deleted file mode 100644 index e715e7b..0000000 --- a/doc/poster/paragraphs.txt +++ /dev/null @@ -1,37 +0,0 @@ -INTRODUCTION - -Nowadays smartphones, internet of things (IoT) and many other wireless -devices are carried around by everyone and have to work in environments -that from a technical perspective are very far from ideal. Wireless -channels have many complex problems that need to be solved to guarantee -a reliable communication link. - -Among the multitude of problems, a common issue that observed in -wireless channels is what is called "multipath fading effect". Multipath -refers to the fact electromagnetic waves (EMWs) radiated from a sender -antenna may take different paths by reflecting on multiple surfaces -before reaching the receiver (see figure). Because EMWs travel at a -constant speed, and some paths are longer than others, the receiver sees -multiple overlapped (superimposed) copies of the sent signal, each with -a different phase shift. In practice only one path is desirable, thus -the other delayed copies cause a degradation of the received signal -(fading). - -TASK DESCRIPTION - -The goal of the project is to develop a platform to illustrate the -impact of different fading effects on the received signal. The platform -is thus built for pedagogical purposes and ought to show the various -parts of the signal processing chain of a receiver. - -METHODS - -Two USRP B210 software defined radio (SDR) devices from Ettus Reasearch, -together with the open source software libraries GNU Radio and Dear -PyGUI were used to create a graphical user interface to display -waveforms from either a simulated or real wireless links affected by -multipath fading. The platform transmits a picture either using QPSK or -16ary QAM over a 2.4 GHz carrier and computes the empirical bit error -rate of the link. - - |