Here is collection of links on HSDPA/HSUPA and related topics. Please let me know if you know of any additional links.
HSDPA
Introductory article: HSDPA introduces new level of complexity to 3G
Introductory Article: HSDPA Description
HSDPA Book - Antti Toskala, Harri Holma, Troels Kolding
Variable TTI proposal for HSDPA
Incremental Redundancy (IR) Schemes for W-CDMA HS-DSCH
What is HSDPA - Mukku Srinivasreddy
HSDPA/HSUPA Transmission
HSDPA/HSUPA Mobility
HSDPA/HSUPA Admission Control
HSDPA/HSUPA Packet Scheduling
HSDPA and HSUPA
Design and Implementation of HSDPA Equalizers Design and Implementation of HSDPA Equalizers
Mobile Network Evolution: A Revolution on the Move - IEEE
HSDPA: Higher Data Rates for UMTS
WCDMA evolved—High-speed packet-data services - Ericsson
HSDPA: WCDMA Evolution - Nokia
HSDPA and beyond - Nortel Networks
HSOPA
HSOPA: The Next Step For GSM?
OFDM:the future, but timing still unclear
HSOPA: Exploiting OFDM and MIMO to take UMTS beyond HSDPA/HSUPA - Nortel Networks
OFDM
OFDM for UMTS enhancement: Summary of the Feasibility Study
HARQ
Performance Comparison of Hybrid-ARQ Schemes
Performance Comparison of Chase Combining and Incremental Redundancy for HSDPA
Adaptive HARQ proposal for HSDPA
Report on Hybrid ARQ Type II/III
Physical-layer Hybrid-ARQ functionality
MIMO
MIMO Extension for UMTS
MIMO - Radio Channel
MIMO for Cellular Systems
Adaptive Modulation Schemes for MIMO HSDPA