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Re: [Discuss-gnuradio] GRC 3.6 / 802.11 a/g test signal

From: Bastian Bloessl
Subject: Re: [Discuss-gnuradio] GRC 3.6 / 802.11 a/g test signal
Date: Mon, 06 Oct 2014 08:12:38 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.2

On 10/05/2014 01:37 PM, Ernest Szczepaniak wrote:

Ok, got this. After some test's i think that the problem is with my
descrambler (de-interleaver and Viterbi seems to be ok). Currently, im using
Matlab's one provided by comm. toolbox.

Is it correct to use 127-bit length pre-defined scrambling/descrambling seq?

No, this is an example output if you initialize the scrambler with 0b1111111.

(i found it in 802.11 standard). Or it sould be only implemented as a shift
register with poly 1+x4+x7?


And last one question:

In any of frames generated by your grc script, there sould be 16x"0" in
SERVICE field (as it a part of PLCP Header)


- becouse a typical wlan card is
able to decode it, it is following the 802.11 standard - am I right?

No. It's following the standard and, thus, a normal card can decode it :-)


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