Abstract
TVWS (TV White Spaces) communication systems are expected as one of the promising technologies to support full-coverage and cost-effective vehicular and transportation communications because of its superior propagation characteristics. IEEE 802.22 that was standardized for point-to-multipoint fixed communications supports a wide coverage of 10–30 km. While the application of IEEE 802.22 to a vehicular network has attracted attentions, it is necessary to improve the receiver performance and to enhance its tolerance in a highly mobile multipath propagation environment. Thus, not only numerical evaluation by computer simulation with baseband signals but also experimental evaluation with RF (Radio Frequency) analog signal are vitally required. In this paper, we develop an SDR (Software Defined Radio)-based evaluation platform enabling a bench test of the PHY (Physical Layer) performance with the RF analog signal for a highly mobile IEEE 802.22 communication system. In this platform, RF signals are transmitted and received with flexibly reconfigurable hardware and software, and the received baseband signals are recorded and stored by the SDR device. The stored data are post-processed with a MATLAB-based program to evaluate transmission performance such as BER. As a measurement result, the SDR-based evaluation system achieves similar performance with computer simulation, and thus, the feasibility of the highly mobile IEEE 802.22 communication system is further demonstrated. In addition, the proposed evaluation platform is also available for the future field experiment and can encourage the development and evaluation of novel PHY algorithms.
Published Version
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