Advertisement

CDMA-Based Onboard Adaptive Digital Beamforming System for Data Relay Satellite

  • Dhaval UpadhyayEmail author
  • Pravin Patidar
  • Jignesh Shah
  • Pratik Mevada
  • Subhash Chandra Bera
  • Sumitesh Sarkar
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 618)

Abstract

Code Division Multiple Access (CDMA) based onboard adaptive digital beamforming (DBF) system is proposed and implemented on hardware. It is essentially required for Tracking, Telemetry and Tele-command (TTC) operations of multiple moving users (LEO) simultaneously through GEO stationary Data Relay Satellite System (DRSS). CDMA based multiple access scheme is proposed on S-band to provide services to multiple users simultaneously on same frequency and to meet power spectral density requirements on the ground. CDMA based adaptive DBF hardware for S-band nine elements axial mode helix antenna array is developed and performance of system is demonstrated in radiation mode conditions. New signal acquisition scheme based on processing of signal received through wide-receive beam using single antenna element is proposed and implemented on hardware. New scheme to generate reference signal by tracking carrier phase and code phase of incoming signal independently from adaptive DBF module is also proposed and implemented on hardware. End-to-end system simulation results are shown for typical DRSS and human space flight mission (LEO). It shows that system provides 0.8° accuracy in adaptive beam steering which is better than 10% of 3 dB beam-width of nine elements array antenna and provides 9 dB adaptive array gain. CDMA-based adaptive DBF hardware provides array gain of 7 dB in radiation mode under lab environment.

Keywords

CDMA Acquisition FLL PLL DLL Least mean square Reference signal generation 

References

  1. 1.
    Winterstein, A., and L. Greda. 2017. An Adaptive Calibration and Beamforming Technique for a GEO Satellite Data Relay. International Journal of Satellite Communications and Networking.Google Scholar
  2. 2.
    Ralph, Jr. T.C. 1978. An Adaptive Array in Spread Spectrum Communication System. Proceedings of the IEEE 66 (3).Google Scholar
  3. 3.
    Widrow, B., P.E. Mantey, L.J. Griffiths, and B.B. Goode. 1967. Adaptive Antenna Systems. Proceedings of the IEEE 55 (12).CrossRefGoogle Scholar
  4. 4.
    Gross, Frank. 2005. Smart antennas for wireless communications with MATLAB. McGraw Hill.Google Scholar
  5. 5.
    Elliott D. Kaplan, and Christopher J. Hegarty. 2006. Understanding of GPS principals and applications. Artech House.Google Scholar
  6. 6.
    Tiwari, Sidhant K, Swarna R, Babu and R. Kumar. 2011. Design of Baseband Processor for High Dynamic GPS Signals Using Higher Order Loops. International Journal of Machine Learning and Computing 1 (5).Google Scholar
  7. 7.
    Mongrédien, C., G. Lachapelle, and M.E. Cannon. 2006. Testing GPS L5 Acquisition and Tracking Algorithms Using a Hardware Simulator. In Proceedings of the 19th International technical meeting of the satellite Division of the ION GNSS, 2901–2913.Google Scholar
  8. 8.
    Carol L. Kory, Kevin Lambert, Roberto Acosta, and James Nessel. 2006. Comparative Study of Antenna Elements for TDRSS Enhanced Multiple Access System. IEEE Antennas and propagation society international symposium.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Dhaval Upadhyay
    • 1
    Email author
  • Pravin Patidar
    • 1
  • Jignesh Shah
    • 1
  • Pratik Mevada
    • 1
  • Subhash Chandra Bera
    • 1
  • Sumitesh Sarkar
    • 1
  1. 1.Space Applications Centre, Indian Space Research OrganizationAhmedabadIndia

Personalised recommendations