Even if you could get asymmetry it wouldn't help much since voice is a symmetric application.Ĭranking up TX power will hurt the reliability of your hardware and increase congestion/interference with your neighbors. Asymmetry is only an optional feature for 802.11ac. That is the downlink speed always matches the uplink speed even though the downlink path usually has a better SINR. That point about possibly amplifying before the amplifier is interesting. In short, I have no idea what you measured, but I don't think it means what you think it means. Maybe you were measuring some sort of integrated noise over a bandwidth, but even then your numbers dont make sense unless the -22dBm is with 150mw (21dBm) output power (because remember, noise increases with increased gain) which is only 43dB SNR compared to 56dB SNR at 42mw output power. Furthermore, because its negative, your signal is lower than your noise. 22 dBm versus -40įirst, SNR is a ratio, so your units should be dB if you are talking about the right thing. In this case, it is perfectly safe to do what he mentioned, but to post a "PSA" saying everyone should turn up their router's Tx power shows a significant lack of understanding on your part and IS POTENTIALLY DANGEROUS TO THE HARDWARE OF OTHERS. With that information, he can SAFELY turn up the output power and have little to no repercussions (its a bit rude to any other wireless networks in the area, but i'll assume he's working on an isolated channel). His examples cite a specific model of router with a specific Tx amplifier and then finds the datasheet for that amp, crunches the numbers and determines that the setting he is using is within the design limits of the amplifier being used. Lets stop the misinformation train right here. He is mixing two terms and treating them as the same thing and then you pick this up and run with it. Now, what I think he was getting as is that the increased gain of the amplifier outweighs the input noise amplification, which results in increased SNR. In most applications, however, the noise of the amplifier itself is the major factor and is not linear w.r.t. When you increase gain in an amplifier, the output noise of the amplifier also increases (you "gain up" the input noise, which comes from any number of sources). Can I say bullshit one more time? Good, its bullshit.īy increasing your output power, what you are really doing is increasing the gain of the Tx amplifier. The writer of this post is assuming that noise=SNR, which is bullshit. This is also nonsense.Ĭomplete and utter BULLSHIT. By the way, SNR means "Signal to Noise Ratio."Īnd that is, that increasing power above the tomato defaults adds NOISE. Unless you start gain compressing due to huge output powers, your SNR will improve with higher output power. No one was mentioning SNR, you were talking about noise.
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