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W-CDMA for the third generation (typically referred to as 3GPP, 3rd Generation Partnership Project ) evolved fromthe technical proposals from Japan and Europe for third-generation wireless communications. The convergence of3GPP specifications is based on inputs from global contributors. 3GPP offers service rates up to 2 Mbps. 3GPP is acomplete protocol stack covering issues ranging from the physical layer to network control aspects.
This 3GPP design library focuses on the physical layer, which includes the following functionalities.Macro diversity distribution/combining and soft hand-over executionError detection on transport channels and indication to higher layersForward error control (FEC) encoding/decoding of transport channelsMultiplexing of transport channels and demultiplexing of coded composite transport channelsRate matching:
data multiplexed on dedicated channels (DCHs)Mapping of coded composite transport channels on physical channelsPower weighting and combining of physical channelsModulation and spreading/demodulation and de-spreading of physical channelsFrequency and time (chip, bit, slot, frame) synchronizationRadio characteristic measurements including frame error rate (FER), signal-to-interference (SIR), interferencepower level, and indication to higher layersClosed-loop power controlRadio frequency processing
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