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Re: [Discuss-gnuradio] Packet Header Generator and Stream CRC32
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From: |
Martin Braun |
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Subject: |
Re: [Discuss-gnuradio] Packet Header Generator and Stream CRC32 |
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Date: |
Tue, 14 Jul 2015 10:02:06 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 13.07.2015 18:09, zs wrote:
> Hi Martin,
>
> Thank you.
>
> 1.Why the packet length should be larger than 32 bits?Can you explain it?
>
> 2.For example,I'm using the OFDM example in gnuradio.If i want to have a
> working CRC,I must set the length>=4?Is 4 OK?
The *header* needs to be 32 bits.
> 3.Is the packet length means that the original length(for example len=a)
> or the length of data pass through CRC(len+4)?
The header does not care what's in the payload (e.g. CRC). I recommend
going through the ofdm_tx example to understand how packet lengths are
set where. If you have specific questions about that, you can of course
post them here.
Cheers,
Martin