RE: CA analysis between CSS and 11g
Rainer,
That should work for an AWGN channel. I we have some simulation
results that would even be better.
Steve
-----Original Message-----
From: Rainer Hach [mailto:R.Hach@nanotron.com]
Sent: Wednesday, May 31, 2006 3:33 AM
To: Shellhammer, Steve; Sheung Li
Cc: pat.kinney@ieee.org; stds-802-19@ieee.org;
Joseph.Levy@interdigital.com; Kyung-Kuk Lee
Subject: RE: CA analysis between CSS and 11g
Steve, Sheung,
Coming back to the question for a BER equation for 11g I wonder whether
the following would make sense:
Identify the modulation and code rate for the data rate in question (e.g
16QAM, R=1/2 for 24Mbit/s),
calculate the partial BER (for on subcarrier) by using the textbook
equation and reasonable coding gain for a convolutional code with k=7
and finally
calculate the BER by assuming the 53 subcarriers to transport
independent bit streams.
Would this approach be acceptable?
Best regards,
Rainer
> -----Original Message-----
> From: Shellhammer, Steve [mailto:sshellha@qualcomm.com]
> Sent: Tuesday, May 30, 2006 10:33 PM
> To: Rainer Hach; Sheung Li
> Cc: pat.kinney@ieee.org; stds-802-19@ieee.org;
> Joseph.Levy@interdigital.com; Kyung-Kuk Lee
> Subject: RE: CA analysis between CSS and 11g
>
>
> Rainer,
>
> I don't recall my statement about mid range, but that
> was two weeks ago. Yes, if one is trying to represent
> typical then 24 Mb/s seems like a reasonable choice.
>
> Steve
>
> -----Original Message-----
> From: Rainer Hach [mailto:R.Hach@nanotron.com]
> Sent: Tuesday, May 30, 2006 9:13 AM
> To: Sheung Li; Shellhammer, Steve
> Cc: pat.kinney@ieee.org; stds-802-19@ieee.org;
> Joseph.Levy@interdigital.com; Kyung-Kuk Lee
> Subject: RE: CA analysis between CSS and 11g
>
> Sheung,
> I am actually trying to get a better understanding of 11g. In
> the 802.11 handbook, it says that the mandatory data rates
> for OFDM are 6,12 and 24 Mbits/s. The 54Mbit/s is optional
> but required for Wi-Fi certification. Is this information correct?
>
> Steve, were you thinking of the 24Mbit/s OFDM mode when you
> suggested the mid range data rate in our discussion in
> Jacksonville? Best regards, Rainer
>
> > -----Original Message-----
> > From: Sheung Li [mailto:sheung@atheros.com]
> > Sent: Friday, May 26, 2006 3:54 PM
> > To: Rainer Hach
> > Cc: sshellha@qualcomm.com; pat.kinney@ieee.org;
> > stds-802-19@ieee.org; Joseph.Levy@interdigital.com
> > Subject: RE: CA analysis between CSS and 11g
> >
> >
> > Let me know what information you need. Most of it should
> > be on the IEEE802 CD-ROM.
> >
> > The optional 22Mbps rates don't use OFDM, and are not
> > widely supported, so CA analysis isn't required. You
> > should take a look at the extremes of the mandatory
> > CCK-OFDM rates such as 6Mbps and 54Mbps.
> >
> > ==S
> >
> > > -----Original Message-----
> > >From: Rainer Hach [mailto:R.Hach@nanotron.com]
> > > Sent: Fri 5/26/2006 1:18 AM
> > > To: Shellhammer, Steve
> > > Cc: pat.kinney@ieee.org; Kyung-Kuk Lee;
> > >stds-802-19@ieee.org; Sheung Li;
> > >Joseph.Levy@interdigital.com
> > > Subject: RE: CA analysis between CSS and 11g
> > >
> > > Steve,
> > > thank you for your email.
> > > Does it mean that there is no 22Mb/s using OFDM?
> > > If so, which data rate do you feel is the most relevant
> > >to assume for
> > > 11g?
> > > Also, could you please let me know the email address of
> > >Sheung Li?
> > > Best regards,
> > > Rainer
> > >
> > >
> > >> -----Original Message-----
> > >> From: Shellhammer, Steve [mailto:sshellha@qualcomm.com]
> > >> Sent: Wednesday, May 24, 2006 8:05 PM
> > >> To: Rainer Hach
> > >> Cc: pat.kinney@ieee.org; Kyung-Kuk Lee;
> > >>stds-802-19@ieee.org;
> > >> sli@sibeam.com; Joseph.Levy@interdigital.com
> > >> Subject: RE: CA analysis between CSS and 11g
> > >>
> > >>
> > >> Rainer,
> > >>
> > >> IEEE 802.11g is primarily based on OFDM. There is a 22
> Mb/s PHY
> > >>using PBCC. However, that PHY is optional and not
> > >> widely deployed. So my personal opinion is that
> > >>analysis of
> > >> the 22 Mb/s PHY is probably unnecessary. However,
> > >> consideration of the OFDM PHY would be very important.
> > >>
> > >> If you need some more details on the OFDM PHY you might
> be able
> > >>to get some assistance from Sheung Li our liaison to
> > >> 802.11. I believe BER curves should be available.
> > >>
> > >> Comment to TAG: In general, maybe if we can start to
> compile some
> > >>of this information we can put it in a common
> > >> place. How about the document that Joseph Levy started?
> > >>
> > >> Steve
> > >>
> > >> -----Original Message-----
> > >> From: Rainer Hach [mailto:R.Hach@nanotron.com]
> > >> Sent: Wednesday, May 24, 2006 7:09 AM
> > >> To: Shellhammer, Steve
> > >> Cc: pat.kinney@ieee.org; Kyung-Kuk Lee
> > >> Subject: CA analysis between CSS and 11g
> > >>
> > >> Steve,
> > >> thanks for your all your input in Jacksonville. Considering 11g
> > >>with 22MBPS I am looking for a BER or PER
> > >> equation. One approch could be to figure out how many
> > >>sub
> > >> carriers with which mdoulation and coding are used and
> > >>then
> > >> combine the BERs for each subcarrier. Is that
> > >>appropriate? If
> > >> so, can you help me with the assumptions on subcarriers
> > >>etc.
> > >> out or can you tell me somebody who could possibly do so
> > >>or
> > >> recommend some document besides the standard itself?
> > >>Thanks!
> > >> Best regards, Rainer
> > >>
> > >> www.nanotron.com
> > >>
> > >>
> > >
> >
> >
>