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Radio Frequency Problem - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Below are all of the old forum threads, including all the responses to the original posts.

-- Amateur Radio
-- Antennas
-- Circuits & Components
-- Systems
-- Test & Measurement

 Post subject: Radio Frequency Problem
Posted: Sun May 18, 2008 4:20 am 
 
Lieutenant

Joined: Sun May 18, 2008 4:18 am
Posts: 1
Under noisy RF conditions, how would i expect network throughput to vary as the fragment size is increased from very short to very long


 
   
 
 Post subject:
Posted: Mon Jun 02, 2008 11:22 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm
Posts: 304
Location: London UK
This is a complex issue. The ITU-R subcommittees have addressed some aspects, particularly in relation to the carrier to noise ratio versus bit errors and block error rates. In the context of asynch framed bit streams the answer depends on what QAM constellation you use. However, the re-try rate for IP based systems, and hence the impact on latency, I do not believe has been covered. Perhaps you may know how one relates to the other. Check out the ITU Radio subcommittees.


 
   
 
 Post subject: Re: Radio Frequency Problem
Posted: Tue Nov 17, 2009 2:43 am 
 
Lieutenant

Joined: Mon Nov 16, 2009 2:11 am
Posts: 2
Hi lankapala,
When you encounter radio communication problems, the configuration of the Wlan devices can be the cause of the radio failure. You must configure certain parameters properly for the devices to communicate successfully. If you configure the parameters incorrectly, the problem that results appears to be a problem with the radio. These parameters include the Service Set Identifier, frequency, data rate, and distance.

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