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Home > Reference > Research and information: general > Research methods: general > On the Performance of Trellis Coded Modulation with Octal Phase Shift Keying Over the Tdrss Channel
On the Performance of Trellis Coded Modulation with Octal Phase Shift Keying Over the Tdrss Channel

On the Performance of Trellis Coded Modulation with Octal Phase Shift Keying Over the Tdrss Channel


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About the Book

As the National Aeronautics and Space Administration moves into the 21st century with programs like Space Station Freedom, a manned mission to Mars, and the new Landsat mission, transmission demands on the Tracking and Data Relay Satellite System (TDRSS) will very likely exceed the available bandwidth. The Manual Lujan, Jr. Center for Space Telemetering and Telecommunications Systems (CSTTS) at New Mexico State University (NMSU) is studying techniques for increasing the data rate capabilities of TDRSS. These techniques include the use of advanced bandwidth efficient modulation formats to increase the data rate that can be sustained in a TDRSS transponder and the use of lossless bandwidth compression of the data to be transmitted to lower the data rate required from the user spacecraft. Based upon current technology the most promising bandwidth efficient modulation technique is Trellis Coded Modulation (TCM) operating with Octal Phase shift Keying (8PSK). Trellis Coded Modulation coding with 8PSK carrier modulation has the capability to increase the data rate which can be transmitted through the TDRSS spacecraft by a factor of 2 to 2.5 times that available with todays coded QPSK systems with only a small penalty in link performance relative to the existing systems. However, before NASA can safely employ TCM coding it is necessary to prove that this complex format can perform on the real TDRSS link as it does in labs and simulation studies. This proof-of-concept test over a live satellite channel was the objective of the construction and testing performed under this task of the NMSU NASA grant referenced above. In conjunction with NASA, NMSU's CSTTS has constructed a system to test a new candidate TDRSS modulation scheme, TCM 8PSK, that can enhance the information throughput of the TDRSS spacecraft. The test system for this project which was constructed over a period of 18 months by NMSU consisted of two racks of commercial and univeristy-designed and -built equipment...


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Product Details
  • ISBN-13: 9781722678685
  • Publisher: Createspace Independent Publishing Platform
  • Publisher Imprint: Createspace Independent Publishing Platform
  • Height: 279 mm
  • No of Pages: 78
  • Spine Width: 4 mm
  • Width: 216 mm
  • ISBN-10: 1722678682
  • Publisher Date: 10 Jul 2018
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 204 gr


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On the Performance of Trellis Coded Modulation with Octal Phase Shift Keying Over the Tdrss Channel
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