Hi,
Just finishing my BSc in I.T. and have chosen to write my 8000 word project report on HSPA technology.
Wikipedia has a great section on the past/present and future surrounding technologies such as W-CDMA.
Here is a brief list of the pages I found useful on Wikipedia.
http://en.wikipedia.org/wiki/CDMA
http://en.wikipedia.org/wiki/Enhanced_Data_Rates_for_GSM_Evolution
http://en.wikipedia.org/wiki/HSDPA
http://en.wikipedia.org/wiki/High-Speed_Packet_Access
http://en.wikipedia.org/wiki/HSUPA
http://en.wikipedia.org/wiki/QPSK
http://en.wikipedia.org/wiki/16QAM
http://en.wikipedia.org/wiki/Spread_spectrum
A great book by a couple of Nokia employees also adds some real technical material to the mix:
#15 Tolma Harri; Toskala Antii; (2006) HSDPA/HSUPA for UMTS – High Speed Radio Access for Mobile Communications, John Wiley & Sons Ltd, Wiltshire. [Available from Waterstones – priced ~£65.00 ISBN 0-470-01884-4]
I will be writing some more soon.