CPICH

AcronymDefinition
CPICHCommon Pilot Channel
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For the 3G, thanks to the use of software prediction, we expressed the BLER according to the CPICH [E.sub.c]/[N.sub.0].
- With xBLER = -0.0001932x3 + 0.02053x2 - 0.2894x 1.098 - With x for CPICH Ec N0/Goodness of fit:
COMPARISONS OF SUBJECTIVE AND PREDICTED VALUES Call Subjective MOS Percentage CPICH SIR BLER Number MOS Predict in 4G(%) RSCP (dB) (Worst -%) 1 4,166666667 3,315492958 85,91549296 -73.9 7.7 0 2 3,833333333 3,837837838 86,48648649 -66.4 8.3 0 3 3,333333333 2,996721311 83,60655738 -75 4 0.3 4 3,333333333 3,492307692 84,61538462 -77 6.2 0 5 3,166666667 3,4 75,6097561 -76,3 8.8 0 6 3,333333333 3,913043478 78,26086957 -74,4 8.9 0 7 3,833333333 3,497560976 75,6097561 -62,3 2.2 0.1 8 3,333333333 3,8 71,82857143 -69,5 8.2 0 9 4,166666667 2,981818182 84,84848485 -79,7 4.4 0.1
The first code of SF 256 is allocated to CPICH and other codes are randomly allocated to other channels.
The pilot information of CPICH is used because the receiver already knows the bit sequence of CPICH and the OVSF code of CPICH is always same.
All 20 bits of CPICH are detected and the detected bits are used as the reference bits when the parameter of all channels is estimated.
For the channels identified with the jth scrambling code at carrier c, the impulse response [h.sub.ck](r) of the channels observed in the kth CPICH frame is calculated as
Figure 3 depicts the comparison between the original PDP for the channel observed in a CPICH frame and that calculated from the reconstructed signals that are computed based on the estimated 10 specular paths.
In the case considered here, the decision with higher occurrence frequency among 49 CPICH frames per location is selected.
donde [P.sub.HS-DSCH] y [P.sub.CPICH] son la potencia del canal HS-DSCH y CPICH respectivamente, [P.sub.tot,HDSPA] es la potencia total de la celda utilizando HSDPA, [I.sub.o] es la interferencia total que actua sobre el usuario y es posible encontrarla como se indica en (8)
La definicion de las caracteristicas de los nodos B debe relacionar todos los parametros que intervienen en la interaccion con el movil, entre los principales se encuentran la potencia maxima de transmision de los canales CPICH, HSDPA y control, la ganancia, el ancho de banda y el ancho del haz de la antena, entre otros.
Por ejemplo, para la celda de estudio, la potencia total es de 43 dBm, al CPICH se le asignan 33 dBm, la potencia de otros canales es de -7 dBm.