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banibani
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re: Modulation roundup: error rates, noise, and capacity
banibani   4/25/2012 4:19:50 PM
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plz help me by giving me the formula of 16-APSK bit error rate or symbol error rate. i need only the equation of APSK bit error rate or symbol error rate.

old account Frank Eory
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re: Modulation roundup: error rates, noise, and capacity
old account Frank Eory   9/16/2011 10:13:45 PM
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The absolute most robust (error-free) settings would be QPSK, rate 1/2 FEC and 1/4 guard interval -- but that might not give you enough Mbps data capacity for what you're doing. Step one is figure out the data rate you need to transmit. Step two, dial in the most robust parameters that are just enough to meet that data rate. Step three, cross your fingers and hope there is enough signal to noise ratio for the receiver to catch all the data with an extremely low bit error rate.

dangermouse
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re: Modulation roundup: error rates, noise, and capacity
dangermouse   9/16/2011 9:11:37 PM
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So if I'm setting up a RF Central Microwave system for a reality TV show and my options are QPSK, 16QAM, or 64QAM. What should I set the transmitter to, to obtain the best quality in the microwave monitor/receiver? And does anyone know about the FEC: 1/2 2/3 3/4 5/6 7/8 Guard interval: 1/32 1/16 1/8 1/4 What are my optimum settings? PLEASE HELP

DerekJC
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re: Modulation roundup: error rates, noise, and capacity
DerekJC   9/4/2009 10:18:22 AM
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Good article. However, it would be useful to include some constellation plots.

tamdtvt
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re: Modulation roundup: error rates, noise, and capacity
tamdtvt   5/12/2009 5:08:23 PM
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please give me sourse code ??

wassouf_salahat
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re: Modulation roundup: error rates, noise, and capacity
wassouf_salahat   12/22/2008 10:51:18 PM
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thatsd great keep going:)



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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