4th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities

Research Article

A low SINR synchronization system for direct-sequence spread-spectrum communications: radio prototype, verification testbed and experimental results

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  • @INPROCEEDINGS{10.4108/tridentcom.2008.3137,
        author={Manish Amde and Jaewook Shim and Joel Marciano and Kenneth Yun and Rene Cruz},
        title={A low SINR synchronization system for direct-sequence spread-spectrum communications: radio prototype, verification testbed and experimental results},
        proceedings={4th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks \& Communities},
        publisher={ICST},
        proceedings_a={TRIDENTCOM},
        year={2010},
        month={5},
        keywords={synchronization direct-sequence spread-spectrum radio prototype asynchronous communication wireless testbed},
        doi={10.4108/tridentcom.2008.3137}
    }
    
  • Manish Amde
    Jaewook Shim
    Joel Marciano
    Kenneth Yun
    Rene Cruz
    Year: 2010
    A low SINR synchronization system for direct-sequence spread-spectrum communications: radio prototype, verification testbed and experimental results
    TRIDENTCOM
    ICST
    DOI: 10.4108/tridentcom.2008.3137
Manish Amde1,*, Jaewook Shim1,*, Joel Marciano2,*, Kenneth Yun1,*, Rene Cruz1,*
  • 1: Department of Electrical and Computer Engineering University of California, San Diego, USA
  • 2: Department of Electrical and Electronics Engineering University of Philippines
*Contact email: mamde@ucsd.edu, j4shim@ucsd.edu, joel@eee.upd.edu.ph, kyy@ucsd.edu, rcruz@ucsd.edu

Abstract

Ability to receive signals at low signal to interference and noise ratio (SINR) improves the spatial range and reliability of wireless networks. However, it is difficult to design a communication system that operates correctly in this type of environment. Our system uses a high spreading gain in the direct-sequence spread-spectrum (DSSS) modulation to combat the problems associated with low SINR. Undoubtedly, synchronization is a severe bottleneck for low SINR reception in DSSS.

In this paper, we present a prototype hardware implementation of a DSSS synchronization system, which was proposed in [1], a testbed, and experimental results. The synchronization system is implemented on a reconfigurable radio prototyping platform and verified on a hardware testbed. Controlled experiments are performed in the laboratory to calibrate its performance. Finally, over-the-air experiments are conducted at two outdoor test sites and the results are presented.