WLAN System Toolbox - Channel Model with Path Loss.

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Kofi
Kofi 2017-8-11
回答： Mike Dachui 2020-5-15
In the WLAN channel models what exactly is the difference between tgacChannel.LargeScaleFadingEffect='Pathloss' and tgacChannel.LargeScaleFadingEffect = 'none'? The documentation apparently says essentially nothing about it. I'd like to run simulations which reflect packet error rates versus Tx-Rx distance - which probably should require some setting for Tx transmit power. I see that getting non-unity packet error rates with setting tgacChannel.LargeScaleFadingEffect='Pathloss' requires SNRs that are unrealistically high (70 dB+ for MCS 4 using channel model 'B'). I know I'm missing something.
Thanks
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Saurabh Gupta
Saurabh Gupta 2017-8-18
I don't have background in WLAN, so I don't have an answer. But it probably is a concept not considered in scope of the toolbox documentation. It might be worth visiting the research papers referenced in the WLAN Channel Models documentation.
[1] Erceg, V., L. Schumacher, P. Kyritsi, et al. TGn Channel Models. Version 4. IEEE 802.11-03/940r4, May 2004.
[2] Breit, G., H. Sampath, S. Vermani, et al. TGac Channel Model Addendum. Version 12. IEEE 802.11-09/0308r12, March 2010.

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Mike Dachui
Mike Dachui 2020-5-15
I have exactly the same question,but with TGah channel！！！
Do you have any solutions?
I use this to compute signal power:
preChSigPwr_dB = 10*log10(mean(abs(preChS1G)));
sigPwr = 10^((preChSigPwr_dB-tgahChan.info.Pathloss)/10);

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