tailieunhanh - Báo cáo hóa học: " A Real-Time GPP Software-Defined Radio Testbed for the Physical Layer of Wireless Standards"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Real-Time GPP Software-Defined Radio Testbed for the Physical Layer of Wireless Standards | EURASIP Journal on Applied Signal Processing 2005 16 2664-2672 2005 Hindawi Publishing Corporation A Real-Time GPP Software-Defined Radio Testbed for the Physical Layer of Wireless Standards R. Schiphorst The Signals and Systems Group Department of Electrical Engineering Faculty ofEEMCS University of Twente . Box 217 7500 AE Enschede The Netherlands Email F. W. Hoeksema The Signals and Systems Group Department of Electrical Engineering Faculty ofEEMCS University of Twente . Box 217 7500 AE Enschede The Netherlands Email C. H. Slump The Signals and Systems Group Department of Electrical Engineering Faculty ofEEMCS University of Twente . Box 217 7500 AE Enschede The Netherlands Email Received 30 January 2004 Revised 23 September 2004 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. 1. INTRODUCTION New wireless communications standards do not replace old