North Queens TV White Space Trials




 Home PageTerrainCoverageTest Site 1 ResultsTest Site 2 ResultsLong Term TestSpecifications

 ThroughputSeasonal VariationInterferenceSpectrumRegulationsClimatic VariationComputer Modelling




  One of the major factors affecting the throughput of any wireless system is the amount of bandwidth allowed by regulation for a channel, with TVWS we have up to 200Mhz of spectrum available but under current rules in Canada are only allowed 6Mhz channel width limiting equipment to a throughput of ~16Mbs UDP or 32Mbs employing MiMo x2.


 All our test were conducted using a single 6Mhz channel and the test results pages indicate the data rata we connected at for various signal to noise ratios (SNR).

 After the bandwidth available the next significant factor determining the throughput is the SNR available which is why we have focus primarily on this in the trials. 


Most jurisdictions have already or are in the process of drawing up regulations that permit bonding two or more adjacent channels we understand Canada is amongst them. The radios we used in the trials are already capable of bonding 2 channels, increasing that to 3 would pose no major technical challenge and add very little to the cost.


 A radio using 3 adjacent channels or 18Mhz bandwidth and MiMo x2 would have a throughput approaching 100Mbs UDP given an adequate SNR. Designing such a radio presents no new technical challenges and we understand 2 Canadian manufactures already have prototypes awaiting the approval process.  


  Note most manufactures quote the UDP data rate which is the one way data rate, although some time sensitive and streaming communications employ this most data is TCP which employs a hand shake and error correction to ensure all the data is received correctly, this overhead results in the TCP data rate being 60-70% of the UDP rate.