Changes between Version 120 and Version 121 of Other/Summer/2015/aSDR1

Timestamp:

Aug 17, 2015, 3:47:59 PM (9 years ago)

Author:

krajput96

Comment:

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Other/Summer/2015/aSDR1

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 Signal to noise ratio is an important part in this localization process. To maintain a high SNR at higher distances means a greater chance of better localization data since there is more signal to collect and analyze. Even in the real world, people look for gadgets and devices with a higher SNR since that provides them with greater aural experience. Due to these reasons, it is very important to analyze SNR to validate the results and conclusions of the experiments.<br>
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 As mentioned above, signal to noise ratio is very important since it relates signal quality as distance between receiver and transmitter increases. Therefore, it is important to gain points at smaller distance increments to certify that accurate data and best fit results are obtained. We obtained signal power and noise amplitude at certain distances that were not accounted before and graphed the data again.
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 <b> Analysis: </b> Each receiver has its own characteristics. Keeping this in mind, we used a new approach (pictured on left) where we move the outdoor node(pictured on right) down the grid and receive the signals at three set receivers at known distances. Using this, we made propagation curves for each receiver to figure out how the receivers receive signals differently. After this, we can efficiently run our experiments and expect better results. Before this can be done, however, calibration of the transceivers is necessary.
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+<font color="red"><b> Experiment Seven: </b></font> Transmitter Calibrator <br><br>
+Calibration of the nodes is an important step if we are to get better localisation data and results. We have to make sure that the transmitters are transmitting the signals at the set frequency; any other frequency would offset the data. Therefore, we decided to see the difference in signal transmitting when connecting the node to a spectrum analyzer versus antenna to antenna transmission.
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