"WINNER II Channel Models", ver 1.1, Sept
"WINNER II Channel Models", ver 1.1, Sept
"WINNER II Channel Models", ver 1.1, Sept
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<strong>WINNER</strong> <strong>II</strong> D<strong>1.1</strong>.2 V<strong>1.1</strong><br />
Above it has been assumed that the CIR samples are taken for each MIMO channel separately and that<br />
the angle information has been vanished in this process. This is the case, when using the model e.g.<br />
with the WIM implementation [WIN2WIM].<br />
5.4.2.2 Down-scaling in frequency domain<br />
If desired, the down-scaling can also be performed in the frequency domain. Then the starting point<br />
will be the original CIR specified in the delay domain. This CIR is transformed in the frequency<br />
domain for each simulation block. Then the transformed CIR can be filtered as desired, e.g. by<br />
removing the extra frequency samples, and used in the simulation as normally.<br />
The maximum frequency sampling interval is determined by the coherence bandwidth<br />
1<br />
B c<br />
= , (5.4)<br />
Cσ τ<br />
where σ τ is the rms delay spread and C is a scaling constant related to fading distribution.<br />
5.4.3 FDD modeling<br />
In next steps we explain how to obtain both uplink and downlink channel of an FDD system with<br />
bandwidths of 100 MHz. The center carrier frequencies are f c and f c + ∆f c :<br />
• Define BS and MS positions, calculate the channel for one link, e.g. BS to MS at certain<br />
carrier frequency<br />
• Save the small scale parameters<br />
• Exchange the positions of the BS and MS<br />
f<br />
c<br />
• Calculate the other link, in this example the MS to BS by:<br />
o Using saved small scale parameters<br />
o<br />
Randomizing the and initial phases of rays<br />
o Changing the carrier frequency to + ∆f<br />
5.5 Comparison tables of <strong>WINNER</strong> channel model <strong>ver</strong>sions<br />
This section shows the main differences between the different <strong>ver</strong>sions of <strong>WINNER</strong> channel models<br />
(Phase I (D5.4), Phase <strong>II</strong> Interim (D<strong>1.1</strong>.1), and Phase <strong>II</strong> Final (D<strong>1.1</strong>.2) models). Note! This section is<br />
aimed as comparison of the different <strong>ver</strong>sions, not as the primary source of channel model parameters.<br />
f c<br />
Table below shows which scenarios are available in the different <strong>ver</strong>sions. Note that all the scenarios<br />
of Phase I have been updated in Phase <strong>II</strong> models.<br />
Table 5-2:Availability of Generic and CDL models<br />
Phase I<br />
Phase <strong>II</strong><br />
Scenario D5.4 D<strong>1.1</strong>.1 D<strong>1.1</strong>.2<br />
Code<br />
Definition<br />
Generic<br />
model<br />
CDL<br />
Generic<br />
model<br />
CDL<br />
Generic<br />
model<br />
CDL<br />
A1 indoor office yes yes yes yes yes yes<br />
A2 indoor-to-outdoor yes yes yes yes<br />
B1 urban micro-cell yes yes yes yes yes yes<br />
B2 bad urban micro-cell yes yes yes yes<br />
B3 large indoor hall yes yes yes yes yes yes<br />
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