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WCDMA Network Architecture

WCDMA Network Architecture The Wideband Code Division Multiple Access (WCDMA) network architecture: 1. User Equipment (UE): The UE, often a mobile phone or data card, is the device used by the end-user to access the WCDMA network. 2. UMTS Terrestrial Radio Access Network (UTRAN): UTRAN is the radio access network in WCDMA, consisting of NodeB … Read more

Vocoder: A Voice Compression in CDMA

When we talk, we pause between syllables and words. CDMA takes advantage of these pauses in speech activity. Analog to digital conversion The voice signal is converted to a digital signal using PCM. Variable rate vocoder The vocoder (Voice Coder) is used to compress the digital signal from the Codec (Code/Decode). The vocoder, used in … Read more