How Channel Mapping in WCDMA
Here I Write about how the mapping can be done between logical, transport and physical channels. Not all physical channels are represented because not all physical channels correspond to a…
Tag: umts
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…
How to LTE Radio Air Interface?
The state-of-the-art design of the LTE air interface is characterised by OFDMA (DL) and SC-FDMA (UL) together with MIMO. The downlink modulation is based on OFDMA (Orthogonal Frequency Division Multiple…
Time switching transmit diversity TSTD in UMTS
Time switching transmit diversity TSTD in UMTS is used only on UMTS SCH channel Time-switched transmit diversity (TSTD) can be applied to the UMTS SCH. Just like Space time block…
Space time block coding based transmit antenna diversity STTD in UMTS
The TX diversity methods in the open-loop mode are as below Space time-block coding-based transmit-antenna diversity (STTD) Time-switched transmit diversity (TSTD). In UMTS STTD the data to be transmitted is…