<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>215</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>90</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>bachelorthesis</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2018-04-09</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>2017-04-28</thesisDateAccepted>
    <title language="eng">Hardware Design and RF Performance Evaluation of a Long Range 2.4 GHz Radio Module</title>
    <abstract language="eng">Low–power, long–range wireless solutions are needed for transmission of environmental and industrial monitoring data from remote, battery–driven sensors. Chirp spread spectrum (CSS) modulation techniques are able to meet these requirements. A CSS–based radio module was designed to operate in the 2.4 GHz frequency band, whose advantages are worldwide availability, lack of duty–cycle restrictions and a broad spectrum. The module’s power consumption is satisfactory, but its range has to be improved. The accuracy of time-of-flight (ToF) distance estimation, an extra feature of the module, has not been evaluated. Impedance matching, transmission lines and printed circuit board design are among the practical aspects discussed, while ToF ranging and orthogonality of CSS signals are considered from a theoretical point of view.</abstract>
    <identifier type="urn">urn:nbn:de:hbz:1383-opus4-2158</identifier>
    <licence>CC BY-SA 4.0 International - Namensnennung-Weitergabe unter gleichen Bedingungen</licence>
    <author>Marcel Dogotari</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Long–range radio module</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Printed circuit board design</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Transmission lines and impedance matching</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Chirp spread spectrum</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Time-of-flight ranging</value>
    </subject>
    <collection role="ddc" number="51">Mathematik</collection>
    <collection role="ddc" number="53">Physik</collection>
    <collection role="ddc" number="60">Technik</collection>
    <collection role="ddc" number="62">Ingenieurwissenschaften</collection>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">Fakultät Kommunikation und Umwelt</collection>
    <thesisPublisher>Hochschule Rhein-Waal</thesisPublisher>
    <thesisGrantor>Hochschule Rhein-Waal</thesisGrantor>
    <file>https://opus4.kobv.de/opus4-rhein-waal/files/215/B.Sc.Thesis_Dogotari.Marcel_Publish_WS2016.pdf</file>
  </doc>
</export-example>
