In a joint filing this past Wednesday, September 19, 2007, Sirius and XM rejected the WCS Coalition proposal to coexist in the 2.3 GHz band. On October 18, 2006, Sirius petitioned the FCC to established the final rules for repeaters. XM followed in January 2007 with its support of the petition. XM took the opportunity to remind the Commission of why the stringent rules were applied to the WCS band.
In its proposal, the Coalition offered a number of compromises. In their joint filling, XM and Sirius successfully refute the arguments put forth by the coalition. However, there were areas of agreement as quoted below:
• blanket licensing of satellite radio repeaters;
• exemption of very low power repeater transmitters from licensing restrictions;
• relying on 16 dB band pass filters in WCS transceivers to reduce potential interference from satellite radio repeaters;
• assessing interference levels via average power measurement;
• establishing inter-licensee coordination to share details about proposed new deployments; and
• commencement of a rulemaking proceeding that will formulate simultaneous changes to both Part 27 and Part 25 rules.
The main areas of concern to XM and Sirius are:
* The mobile services would "cause crippling interference to Satellite Radio"
* Limiting transmit power rather than power flux density would cause undue interference to satellite radio
* Refusal of the Coalition to accept the grandfathering of existing repeaters.
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