OFDM LS Channel Estimation or Differential Modulation

This freescale appnote:

http://www.freescale.com/files/dsp/doc/app_note/AN3059.pdf

talks about all the different kinds of channel estimation schemes for
OFDM reception.  They discount differential modulation, but how does
it compare with the simplest channel estimation techniques: Least
Square (LS)?

Alan

On Jan 15, 4:07 pm, BlackMagic <alan_w_sim...@yahoo.com> wrote:
> This freescale appnote:
>
> http://www.freescale.com/files/dsp/doc/app_note/AN3059.pdf
>
> talks about all the different kinds of channel estimation schemes for
> OFDM reception.  They discount differential modulation, but how does
> it compare with the simplest channel estimation techniques: Least
> Square (LS)?
>
> Alan

Compare in terms of what, performance?  Differential will lose
due to noise doubling, and least-squares depends on the quality of
the estimate itself.  So it depends on your SNR.