High-resolution spread spectrum channel sounder for wirelesscommunications systems

摘要

This paper presents a new commercial wide-band channel sounder(SARACOM). This instrument measures the complex envelope of the channelimpulse response by the use of a sliding correlator. The principles andbenefits of this technique are briefly reviewed. The hardwarearchitecture of the system is explained. The choice of key parameterssuch as chip rate, pseudonoise sequence length versus sounderperformance are discussed and verified by laboratory tests. Measurementresults in the 2.45 GHz band in a large indoor environment are thenpresented in order to demonstrate the performance of the equipment in arealistic situation. The capabilities of the post-processing softwareare then illustrated