WINNER II pdf - Final Report - Cept
WINNER II pdf - Final Report - Cept
WINNER II pdf - Final Report - Cept
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<strong>WINNER</strong> <strong>II</strong> D1.1.2 V1.2<br />
account several aspects – e.g. channel sounder setup, measurement route, link budget. Channel<br />
measurements are done according to the campaign planning and documented accurately. Measurement<br />
data is stored onto a mass memory (e.g. magnetic tape or hard disk).<br />
The second phase of the channel modelling process concentrates on data analysis. Depending on the<br />
required parameters, different analysis methods and items are applied. Output of data post-processing<br />
could be, e.g., a set of impulse responses, path-loss data, or extracted multidimensional propagation<br />
parameters. For the post-processed data, statistical analysis is done to obtain parameter PDFs.<br />
The third phase of the channel modelling process covers the items required in simulation. Parameters are<br />
generated according to the PDFs, by using random number generators and suitable filters. MIMO transfer<br />
matrix is obtained by using the generated parameters, and information about the antennas. In our<br />
approach MIMO transfer matrices are generated by using the sum-of-rays method. Generated impulse<br />
responses are called channel realisations, which are then used in simulations.<br />
1<br />
generic<br />
model<br />
Campaign<br />
planning<br />
Channel<br />
measurements<br />
measurement<br />
measurement<br />
measurement<br />
data data<br />
data<br />
2<br />
data postprocessing<br />
/<br />
analysis<br />
parameter<br />
parameter<br />
parameter<br />
PDFs<br />
PDFs<br />
PDFs<br />
3<br />
parameter<br />
generation<br />
array<br />
responses<br />
MIMO transfer<br />
matrix<br />
generation<br />
parameter<br />
parameter<br />
channel<br />
PDFs<br />
realisations<br />
PDFs<br />
Simulations<br />
Figure 3-2 <strong>WINNER</strong> channel modelling process<br />
3.3 Network layout<br />
<strong>WINNER</strong> MIMO radio channel model enables system level simulations and testing. This means that<br />
multiple links are to be simulated (evolved) simultaneously. System level simulation may include<br />
multiple base stations, multiple relay stations, and multiple mobile terminals as in Figure 3-3. Link level<br />
simulation is done for one link, which is shown by blue dashed ellipse. The short blue lines represent<br />
channel segments where large scale parameters are fixed. System level simulation consists of multiple<br />
links. Both link level and system level simulations can be done by modelling multiple segments, or by<br />
only one (CDL model).<br />
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