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Re: [Discuss-gnuradio] Problem with OFDM_tx OFDM_rx
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From: |
Michael Dickens |
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Subject: |
Re: [Discuss-gnuradio] Problem with OFDM_tx OFDM_rx |
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Date: |
Thu, 23 May 2019 11:14:11 -0400 |
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User-agent: |
Cyrus-JMAP/3.1.6-550-g29afa21-fmstable-20190520v1 |
Hi farid mihoub - The GR-provided digital OFDM Tx -> Rx is prone to packet losses as any real wireless system will be, but especially in the first packet Tx'd for whatever reason. This OFDM is unsynchronized, so the Rx is continually searching for the OFDM preambles, which with more noise becomes less likely to correctly detect; as the environment gets noisier, more packets will be lost. Also, no FEC is used to protect the packet data, though a least CRC is used to verify the whole Rx packet's integrity. Hope this is useful! - MLD
On Thu, May 23, 2019, at 11:03 AM, farid mihoub wrote:
Hello,
I am using OFDM_tx and OFDM_rx examples in gr-digital, at the reception
I am always loosing "1x packet_len" of bytes that I have transmitted.
thank you.
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