Satellite Industry Assn. (SIA) submitted technical analysis to FC...
Satellite Industry Assn. (SIA) submitted technical analysis to FCC that it said further bolstered argument that ultra-wideband (UWB) devices would “irreparably harm” earth stations operating at 3.7-4.2 GHz. SIA has petition for reconsideration pending on UWB rules adopted in…
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Feb. 2002. Challenge argued UWB rules would put fixed satellite services (FSS) in 4 GHz band at risk of harmful interference from UWB. In Jan. 10 filing, SIA said its latest technical analysis provided more support that UWB devices would expose such FSS systems to interference and its analysis demonstrated harmful interference would occur in every transponder across 3.7-4.2 GHz. Analysis said point of SIA study was to estimate signal level from UWB device as received by “typical” earth station at certain distance from transmitter in 4 GHz band. SIA told FCC that study found UWB device would “cause harmful interference to the receiving earth stations if the device is visible to the earth station,” especially during peak emission times. Assn. also raised concerns about aggregate interference potential from UWB devices. Analysis said harmful interference occurs not only at peak pulse period of UWB devices but also “in the interval due to multipath reflection of the UWB signal as received at the earth station.” If that were taken into account, SIA said, “the effective harmful interference interval could be many times the actual UWB peak-pulse interval.”