On Mar 31, 5:34*pm, Ubaid Abdullah <ubaidabdul...@gmail.com> wrote:
> ckian...@gmail.com wrote:
> > Hi, any insight to these queries?
>
> > 1) Which come first at the transmitter - cyclic prefix or pulse
> > shaping? Reason I ask this is if cyclic prefix is done first, won't
> > the pulse shaping destroy the structure?
>
> pulse shaping comes first at the transmitter and then comes CP(always
> the last step).
>
> > 2) Which pulse shapes are used - RC or RRC? Is a corresponding matched
> > filtering required at the receiver?
>
> RRC. Yes a corresponding matched filter is required to maximize the
> SNR and make use of the "information in the pulse shape" i.e. which
> sample to weight more or less.
>
> > Reason I ask this is some
> > literature seem to imply that a matched filter is not necessary at the
> > receiver.
>
> Mention the literature you are referring to or the context in which
> they said so.
>
> Ubaid Abdullahhttp://dspdotcomm.blogspot.com

For example, there isn't a matched filter in Figure 1 of "Peak-To-
Average Power Ratio of Single Carrier FDMA Signals with Pulse
Shaping". I thought maybe there is but not shown. In section 3 of the
paper, it is mentioned that RC pulse is used. Since PAPR should be
computed before any matched filtering (am I right?), it seemed to
imply that RC pulse is used at the transmitter pulse shaping and hence
no matched filtering at the receiver.