7.2 Diversity characteristics

25.1013GPPRelease 17TSUser Equipment (UE) radio transmission and reception (FDD)

A suitable receiver structure using coherent reception in both channel impulse response estimation and code tracking procedures is assumed. Three forms of diversity are considered to be available in UTRA/FDD.

Table 7.1: Diversity characteristics for UTRA/FDD

Time diversity

Channel coding and interleaving in both up link and down link

Multi-path diversity

Rake receiver or other suitable receiver structure with maximum combining. Additional processing elements can increase the delay-spread performance due to increased capture of signal energy.

Antenna diversity

Antenna diversity with maximum ratio combing in the Node B and optionally in the UE. Possibility for downlink transmit diversity in the Node B.