signal detection in doppler

Hello People

I have been scratching my head on this doppler problem:

Because of the doppler effect, the received signal will either be expanded
or compressed on time axis.

Now, the expansion or compression is sampling rate conversion. So, I tried
to use 'resample' function of matlab. The actual length of the signal is
30720 and sampling freq is 48000Hz.

Now, when I use y=resample(x,10010,10000) i can find the peak i.e. start
of my data by correlating the signal with training sequence.

But when I use y=resample(x,10007,10000) i can't find the peak.

So is there any better way to
1. model this exapnsion or compression
or 2. to find peak when the received is corrupted by severe doppler.

Help in this regard will be highly appreciated.

Chintan
.

Relevant Pages

  • Re: signal detection in doppler
    ... Because of the doppler effect, the received signal will either be expanded ... the expansion or compression is sampling rate conversion. ... But when I use y=resamplei can't find the peak. ...
    (comp.dsp)
  • Re: signal detection in doppler
    ... Because of the doppler effect, the received signal will either be ... the expansion or compression is sampling rate conversion. ... Now, when I use y=3Dresamplei can find the peak i.e. ...
    (comp.dsp)
  • Re: FCC To Restrict Loud TV Commercials
    ... even if the "peak" levels are the same. ... I don't think it's that kind of data compression they're talking about ... It's the same thing that's been driving the so-called "loudness ... sounds, except those already at maximum loudness, become louder. ...
    (rec.arts.tv)
  • Re: FCC To Restrict Loud TV Commercials
    ... even if the "peak" levels are the same. ... Why would commercials have more highly compressed soundtracks than ... I don't think it's that kind of data compression they're talking about ... It's the same thing that's been driving the so-called "loudness ...
    (rec.arts.tv)
  • Is compression necessary
    ... So I'm mixing down a song with a decent amount of dynamic range. ... The Ultramaximizer completely destroyed the intensity of the peak and gave it a super breathy, airy, gasping sorta sound. ... I really need that extra 7db of headroom at the top, not only to balance out the song, but also to balance with the rest of the songs on the album which are pretty heavily compressed and therefor sound really loud. ... Or should I use some other compressor or compression technique? ...
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