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  • Research Article
  • Open Access

A Real-Time GPP Software-Defined Radio Testbed for the Physical Layer of Wireless Standards

EURASIP Journal on Advances in Signal Processing20052005:484375

  • Received: 30 January 2004
  • Published:


We present our contribution to the general-purpose-processor-(GPP)-based radio. We describe a baseband software-defined radio testbed for the physical layer of wireless LAN standards. All physical layer functions have been successfully mapped on a Pentium 4 processor that performs these functions in real time. The testbed consists of a transmitter PC with a DAC board and a receiver PC with an ADC board. In our project, we have implemented two different types of standards on this testbed, a continuous-phase-modulation-based standard, Bluetooth, and an OFDM-based standard, HiperLAN/2. However, our testbed can easily be extended to other standards, because the only limitation in our testbed is the maximal channel bandwidth of 20 MHz and of course the processing capabilities of the used PC. The transmitter functions require at most 714 M cycles per second and the receiver functions need 1225 M cycles per second on a Pentium 4 processor. In addition, baseband experiments have been carried out successfully.

Keywords and phrases

  • software-defined radio
  • testbed
  • baseband
  • physical layer
  • HiperLAN/2
  • Bluetooth

Authors’ Affiliations

The Signals and Systems Group, Department of Electrical Engineering, Faculty of EEMCS, University of Twente, P.O. Box 217, Enschede, 7500 AE, The Netherlands


© Schiphorst et al. 2005