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This Application Note describes the HSDPA and HSUPA uplink channel structure. Challenges for UE power amplifier design are outlined, and guidelines how to use R&S measurement equipment for testing UE power amplifiers are provided.

High Speed Downlink Packet Access (HSDPA) is part of 3GPP release 5 of WCDMA and is currently being deployed in 3G networks worldwide. HSDPA makes downlink data rates of up to (theoretically) 14 Mbps possible and significantly increases the capacity of the mobile network.

With HSDPA, new physical and transport channels are introduced on the air interface. Besides 2 new downlink physical channels for transmission of user data and control information, the High Speed Dedicated Physical Control Channel (HS-DPCCH) was introduced as a new uplink code channel for control purposes.

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•Application Note: High-Speed Downlink Packet Access (HSDPA): Challenges For UE Power Amplifier Design