Transmission and reception of reference preamble signals in OFDMA or OFDM communication systems
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United States of America Patent
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Feb 14, 2012
Grant Date -
Mar 9, 2006
app pub date -
Jul 27, 2005
filing date -
Jul 27, 2004
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Expired
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Abstract
Techniques for generating preamble sequences for OFDM and OFDMA communication systems based on CAZAC sequences with desired properties of constant amplitudes (CA) and zero autocorrelation (ZAC). Such preamble sequences may be used for synchronization and identification of individual transmitters. For example, the OFDMA symbol is constructed using a CAZAC sequence in the frequency-domain and the resulting time-domain waveform is a near-CAZAC sequence.
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