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.
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