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siddharth Shetty

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19 Mar 2010 UWB Fixed-Point Model (Multiband OFDM) Ultrawideband (UWB) multiband OFDM physical layer with fixed-point transmitter/receiver modeling. Author: Mike Mulligan

Reference: My comment on 20 Jul 2009.

I updated the Simulink files using command SLUPDATE... this solved my problem....

sid

21 Dec 2009 Simulink Model of the IEEE 802.11n PHY Layer model Simulink model of 802.11n wireless LAN physical layer (baseband), supporting many diff rates. Author: Tokunbo Ogunfunmi

Hi Arya

I am facing the same problem and I am using the same MATLAB version as you (R2008b 7.7). Did you resolve this problem?

Thanks
sid

26 Nov 2009 WiMAX 802.16e PHY and MAC (beta) WiMAX Physical and MAC Layer Author: Muhammad Nadeem Khan

Hi again

Think I have figured out the solution to the 2nd question (my post on 25Nov, 2009), and the required SNR has dropped to 12dB. This SNR is still much higher than published 802.16e spec for QPSK 1/2 (Table 266). Any ideas why the difference?

Cheers
sid

25 Nov 2009 WiMAX 802.16e PHY and MAC (beta) WiMAX Physical and MAC Layer Author: Muhammad Nadeem Khan

Hello Muhammad

Thanks very much for your helpful contribution.

Two questions:
- This seems to be QPSK with 5/6 rate coding. The SNR required to meet 10% PER comes out to be 15dB which is close to the published SNR for 16-QAM 3/4 in the 802.16e spec. Is this something you have observed? Or have I got this wrong?
- If I want to modify this model to look at convolution 1/2 coding, what changes need to be made? I am guessing there needs to be some changes before the Interleaver block which expects 384bits as input. Any model you can share?

Thanks and Regards
sid

20 Jul 2009 UWB Fixed-Point Model (Multiband OFDM) Ultrawideband (UWB) multiband OFDM physical layer with fixed-point transmitter/receiver modeling. Author: Mike Mulligan

Thanks very much for this contribution. I am running MATLAB verion 7.7 (R2008b) and enountering errors when I run the uwb.mdl:
Reference to non-existent field 'comm'.
Error in 'uwb/Scopes': Initialization commands cannot be evaluated

Anyone who faced similar problems? Please feel free to send me a response at shettysid@gmail.com

Thx...sid

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