Affiliation:
1. University of South Florida, USA
Abstract
Software-defined radios (SDR) are gradually becoming a practical option for implementing RF communication systems due to their low cost, off-the-shelf availability, and flexibility. Although the analog limitations of the hardware devices in these systems create barriers to some applications, creative algorithms in digital signal processing (DSP) can improve the results. In some cases, this improvement is essential to establishing a robust and reliable communication. The universal software radio peripheral (USRP) is a popular hardware that can be used alongside the SDR. Among many capabilities of USRP and its changeable daughter boards is receiving GPS signals. The GPS satellites transmit data on two main frequencies, L1 (1575.42 MHz) and L2 (1227.60 MHz). In this chapter, the focus is on describing a detailed implementation of the real-time DSP-based algorithm for USRP to detect GPS signal, namely the L1 band that transmits at 1575.42 MHz.
Reference27 articles.
1. Badombena-Wanta, S., & Sheybani, E. O. (2010). Mobile communications for development: Enabling strategic and low-cost e-applications for rural and remote areas. Proceedings of Wireless Telecommunications Symposium (WTS), 1 – 7.
2. Dupleich, D., Grimm, M., Schlembach, F., & Thomä, R. (2013). Practical aspects of a digital feed forward approach for mitigating non-linear distortions in receivers, Telecommunication in Modern Satellite Cable and Broadcasting Services (TELSIKS) 2013 11th International Conference on, 170-177.
3. The Universal Software Radio Peripheral (USRP) Family of Low-Cost SDRs
4. Ettus.com. (2014). UHD - USRP2 and N2x0 Series Device Manual. Retrieved July 1, 2014, from http://files.ettus.com/uhd_docs/manual/html/usrp2.html#use-the-card-burner-tool-windows
5. Engineering Senior Design Course: New and Improved.;S.Garcia-Otero;Proceedings of ASEE National Annual Conference,2011