High Speed Downlink Packet Access, or HSDPA, is a packet based data service
feature of the in WCDMA standard which provides a
downlink with data
transmission up to 8-10 Mbps (and 20 Mbps for
MIMO systems) over a 5MHzbandwidth in WCDMA downlink. The high speeds of
HSDPA is achieved through techniques including; 16 Quadrature Amplitude
Modulation, variable error coding, and incremental redundancy. HSDPA is a
technology upgrade to current UMTS networks.
3G Americas Technology Center Beyond UMTS/WCDMA high-speed data technology await enhancements that provide even faster speeds and opportunities for an array of market applications.
