In the past fifteen years CWINS has conducted numerous radio channel measurements for local wideband communication applications such as wireless LAN and PCS. The results are used to develop realistic radio channel models needed to simulate radio propagation when evaluating the performance of modem technologies and media access protocols.

Wideband Measurement Systems

• Frequency domain network analyzer system with IFFT capability
• Sliding correlator spread spectrum system
• All Digital Channel Sounder
• Direct RF pulse transmission

Office areas

Residential areas

Commercial areas (manufacturing floors, supermarket floors, )

Tunnel environments

• Ray Tracing technique for indoor and microcellular environment
• Finite difference time domain (FDTD) technique for small indoor areas
• Statistical time-domain model for indoor areas
• Autoregressive statistical frequency-domain model for indoor areas
• JTC model in block oriented SPW software