By J. C. Bic, E. Bonek
An in-depth overview of the common cellular Telecommunication process (UMTS) for telecommunications teachers, researchers, and communications experts.
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Extra info for Advances in UMTS Technology
Moreover, we evaluated, based on laboratory experiments, the forward link performance using four-antenna AAA-TD with SIR based fast TPC. The average BE performance of a MS using AAA-TD when fast TPC was used in the forward link plotted in Figure 27 as a function of the average transmit E b /N 0 . The experimental configuration of AAA-TD is described in . The number of users was four (3-interfering users) and the DOAS of the desired and interfering users were set to θD = - 50 degrees and θU = -20, + 15, + 45 degrees.
The CPICHS with the same spreading code, but different data modulation patterns, are transmitted from two antennas in the same carrier phase. Two open-loop type transmit diversity schemes were adopted in the3GPPstandardization: TSTD  and space-time transmit diversity (STTD) [5, 34]. STTD, which is used for the CCPCH, transmits two data sequences in parallel after coding from two antennas using different channelization codes. Since the fading correlation between the two antennas is low, the fluctuation in the received signal level due to fading is mitigated.
In the first stage, the received signal of each antenna is directly embedded into the CEIGU as well as the conventional MF-based Rake receiver. For the CEIGU input signal of the b-th antenna of the k-th user in the p-th stage, (p 2), the estimated interference replicas of all other users, , user's own channel, Σ and other multipaths of the ), which are estimated in the p vious stage, are weighted by the interference rejection weight control (IRWC) value, ap , and removed from the signal received.