Invention Grant
- Patent Title: Slow speed mute resistance via selective COFDM bin loading
- Patent Title (中): 通过选择性COFDM箱装载,缓慢的静音电阻
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Application No.: US12415648Application Date: 2009-03-31
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Publication No.: US08391132B2Publication Date: 2013-03-05
- Inventor: Carl Scarpa , Christopher Strolle
- Applicant: Carl Scarpa , Christopher Strolle
- Applicant Address: US NY New York
- Assignee: Sirius XM Radio Inc.
- Current Assignee: Sirius XM Radio Inc.
- Current Assignee Address: US NY New York
- Agency: Kramer Levin Naftalis & Frankel LLP
- Main IPC: H04J11/00
- IPC: H04J11/00 ; H04W4/00 ; H04B7/02

Abstract:
Systems and methods are presented for improving the ability to withstand slow speed mute via diversity transmission while avoiding loss in link level margin. In exemplary embodiments of the present invention, systems and methods are presented for improving resistance to slow speed muting by employing transmit diversity where a second signal is not a replica of the original signal. The second signal can be generated, for example, by using only a COFDM FFT bin that contained the cluster sync bit while setting all other bins to zero. That is, only the spectral portion of interest of the COFDM signal need be utilized. In such exemplary embodiments, the same frequency and time delay offset can be used as in current systems and methods, except that the replica COFDM signal can, for example, consist of only one populated FFT bin.
Public/Granted literature
- US20090245087A1 Slow Speed Mute Resistance Via Selective COFDM Bin Loading Public/Granted day:2009-10-01
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