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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] Fwd: Re: Transmission error |
Date: | Thu, 1 Oct 2015 12:49:25 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 |
Dave, you've been told this *several times* now: This is Radio communication. Every radio transmission has a certain probability of going right or wrong. You will never ever have a 0% bit error rate system under real world influences. It is *not* an indication of something being wrong when some packets are not ok=true. You need to understand that, really. You should brush up your theoretical basis; get a textbook, read up on "noise", "AWGN", the "binary channel model", and lastly, when you really understand all these concepts "channel capacity". You will realize that in every environment, each symbol transfered over the air will have a non-zero probability of being flipped. By improving the transmission parameters, you can reduce that symbol error probability, but you cannot reduce it to 0. Each packet contains a lot of bits of info, meaning that to get a successful packet transmission, each of the many symbols that make up that packet need to be correctly received; that is a very classical probability; for a memoryless channel, the probability that a packet is being transmitted without a single symbol error is relatively simple to calculate. I don't mean to be rude, but: You're wasting your (and our) time always asking "can somebody help me improve what I do with these ready-to-use scripts"; you will need to _understand_ at least roughly what you're doing; there's no way around that. I think these "how to use benchmark_tx/rx" threads have gone and I shall give them a bit of rest now. Best regards, Marcus On 30.09.2015 18:44, Rama V wrote:
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