Contents
Glossary:
FDMA: In Frequency Division Multiple Access, each user is given a particular frequency which he can use at all times. Hence this technique requires very good filtering abilities and interference will be high if users are high.· TDMA: In Time Division Multiple Access, the entire bandwidth is available for use but only at particular times for one user. Therefore this demands high degree of synchronization between the users.
· Auto-correlation: The auto-correlation for a periodic signal of period T is defined as follow:
It defines how much a function correlates with a time shifted version of itself, with respect to that time shift.
· Cross-correlation The cross-correlation for periodic signals of period T is defined as:
It measures how much two different signals, Wi and Wj, one shifted in time with respect to the other, correlate as a function of that time shift.
Acknowledgements
We thank Prof V.M.Gadre, our course instructor, for giving us this opportunity to do this presentation, for encouraging us to explore the practical applications of this course. It was a learning experience and fun. We also thank the course associates for reviewing the material and extend our gratitude to all those who have helped us in making this presentation possible.References
· Wireless Digital Communications (Modulation and Spread Spectrum Applications)---Dr.Kamilo Feher.· Communication Techniques for Digital and Analog Signals --- Morton kanefsky.
· Wireless Networking Notes --- Techfest 2003
· http://www.sss-mag.com/ss.html#tutorial
· http://www.sss-mag.com/primer.html#vpintro
· http://www.cwt.vt.edu/faq/dsss.htm
