RFMW Design
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HSDPA
High Speed Downlink Packet Access (HSDPA) is a packet-based data service in W-CDMA. The Technology improves the downlink preformance of WCDMA Networks supporting data transmission rates of up to 10 Mbps. HSDPA Uses 5 MHz Channels and is implimented using Adaptive Modulation and Coding (AMC), Multiple- Input Multiple- Output (MIMO), Hybrid Automatic Request (HARQ), fast cell search and Advanced receiver design.
     

Articles & Tutorials
HSDPA
from Wikipedia
Understanding HSPA: High-Speed Packet Access For UMTS 
from Qualcomm University
HSDPA Basics 
from GSM World
WCDMA evolved—High-speed packet-data services
from ericsson
High Speed Downlink Packet Access (HSDPA): Higher Data Rates for UMTS
by Naveen Shankpal from Munich University of Technology
HSDPA for Improved Downlink Data Transfer
from Qualcomm
HSDPA Technology and Applications Overview
An Overview of the technology and its Applications from www.gsmworld.com