We will present a simple overall system level block diagram that is used to demonstrate
the proposed methodology and identify critical areas (defined as bottlenecks) in the overall
design (see Fig. 9.20).
We have traced the data/control flows through the receiver for three cases. The first case is the traditional
voice application which is outlined by the line with the long dashes. Generally the data samples
flow through the CP, for example, the RAKE transport channel (TrCh) demultiplexing and then
to the vocoder. In the WCDMA case this will consist of a single-code despreader with a high spreading
factor. The second case is the simultaneous service scenario of both voice and data, which are outlined
as the short- and long-dashed lines. In the WCDMA space this would consist of receiving not
only the DPCH but also the HS-DSCH. Here a higher data throughput through the CP is required
(possibly mandating advanced receiver architectures as previously discussed in the earlier chapters)
and then entering a multimedia device. This application can be surfing the world wide web (WWW)
while maintaining a conversation. The last case simply involves using the UE as a multimedia device
such as gaming, video, still picture camera and/or audio player (shown by the solid line) while using
another Layer 1 interface (e.
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