Code Orthogonality in 3G UMTS Mobile Wireless Systems

The spreading codes of 3G UMTS were designed to be mutually orhogonal. Ideally this would nullify the inter-cell interference. However due to the dispersive nature of the wideband UMTS channel, this orthognality is compromised and interference is generated. This book looks at quantifying code orthogonality for practical outdoor radio channels in SISO, MISO and MIMO antenna deployments. It further looks at various applications for utilizing this derived orthogonality factor. The book also contains an in-depth discussion about measureing the outdoor MIMO radio channels by adapting a SISO channel sounder. The measurements reported here were amoungst the first of its kind, to be conducted in an outdoor radio environment.

Autorentext

Mythri Hunukumbure holds PhD and MSc degrees in wireless communications systems from University of Bristol, UK. He is currently working as a Principal Researcher at Fujitsu Labs of Europe Ltd. He has conducted extensive research on 3G and 4G communication systems over the last decade, producing over 30 journal and conference papers and 18 patents.