An effective solution of wireless channel sounder and its channel modeling application

A real time wideband wireless channel sounder based on WCDMA system is introduced in this paper. After installing a baseband data, acquisition device to the base station and some modifications on test UE, a real time wideband wireless channel sounder is established with fairly high performance and low cost comparing to commercial channel sounders. The time resolution of this sounder is limited by the WCDMA system band width and chip rate; however it can provide an extremely high data storing rate up to 100M bytes/second which guarantees a high sampling speed up to 15000Hz of the time variant wireless channel and multi-channel measurement simultaneously. The high sampling rate make it available to have a close sight of time variant characteristic of wireless channel such as small scale fading and doppler effect. The performance of sounder is analyzed and summarized in detail; also the post-processing method of the measurement data is described briefly. Some measurement results corresponding to different wireless environment are presented as examples; wireless channel propagation characteristic analyzing and wireless channel modeling application are introduced finally.