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Re: [Discuss-gnuradio] Some basic questions

From: Mike Jameson
Subject: Re: [Discuss-gnuradio] Some basic questions
Date: Tue, 8 Jun 2010 14:41:24 +0100

Hi Jack,
Answer to question 1:
I believe the whitening option randomises the data bits so that the PAPR (Peak-to-Average Power Ratio) is reduced.

On 3 May 2010 22:25, jack william <address@hidden> wrote:
Could someone please answer following questions of mine :
1) In
pkt = ofdm_packet_utils.make_packet(payload, 1, 1, self._pad_for_usrp, whitening=True)

what is whitening?

2) In gr.fft_vcc(fft_size,forward, window, shift=false)
     What is window vector?

3) in ofdm_mod there is a portion of code having comments:
Use freq domain to get doubled-up known symbol for correlation in time domain

Can you please explain this part.
Thank you in advance.

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