Methods, apparatus and computer program products for beacon generation and processing in an OFDM communications system
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United States of America Patent
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Aug 21, 2012
Grant Date -
Dec 6, 2007
app pub date -
May 29, 2007
filing date -
May 30, 2006
priority date (Note) -
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Abstract
An enhanced-range beacon signal transmitted from a wireless terminal in a frequency band used by the wireless OFDM communications system for OFDM communications. The beacon may be received at each of a plurality of base stations of the wireless OFDM communications system. A location of the wireless terminal may be determined responsive to reception of the beacon signal at the plurality of base stations. In some embodiments, the beacon signal includes a narrowband beacon signal, which may be centered at a frequency offset with respect to a set of subcarriers used in the wireless OFDM communications system, for example, between adjacent subcarriers of the wireless OFDM system and/or in a guard band of the OFDM frequency band.
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