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| WiMAX Wars |
| Posted: January 2009 | ||||||
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Page 1 of 8
The downlink C-band, both extended (3.4 – 3.7 GHz) and standard (3.7 – 4.2 GHz), is of great importance to satellite operators especially in countries with high rain rates since, at these frequencies, there is almost no signal attenuation due to rain. WRC-07 added footnotes for some countries designating bands in the extended C-band for International Mobile Telecommunications (IMT).WiMAX is a broadband wireless access (BWA) technology comprised of both fixed and mobile standards. Fixed WiMAX systems can be deployed under the fixed service allocations in the ITU Table of Frequency Allocations and mobile WiMAX can be deployed under the mobile service allocations. Mobile WiMAX is an IMT system and can therefore also be deployed in the IMT designated bands. Whether fixed or mobile, these BWA systems operating in the C-band can cause harmful interference into FSS operation even when there is a separation of frequencies. This type of interference has been widely studied and is well documented and acknowledged even by the WiMAX proponents. This report will examine the following questions: 2.What happened at WRC-07 with respect to allocations for BWA? 3.Where does IMT fit with respect to 3G and 4G networks? 4.Where does WiMAX fit in the BWA picture? 5.What are the differences and similarities between Wi-Fi and WiMAX? 6.What kind of interference can satellite operators expect from WiMAX operation? 7.What can Asian satellite operators expect in terms of future deployment of BWA systems?
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