发明名称 |
Technique for Searching for a Preamble Signal in a Spread Spectrum Signal Using a Fast Hadamard Transform |
摘要 |
In one embodiment, a method for demodulating and searching for a preamble signal containing a complex phasor signal is disclosed. The complex phasor is demodulated using a phasor-rotated fast transformer. A received signal is correlated with a spreading code to produce a correlated signal. The correlated signal is coherently accumulated to produce a coherently accumulated signal. A first phasor-rotated signal transformation is performed on a real component of the coherently accumulated signal, and a second phasor-rotated signal transformation is performed on an imaginary component of the coherently accumulated signal. Finally, the signal power of the transformed real and imaginary components of the coherently accumulated signal is determined. |
申请公布号 |
US2012250732(A1) |
申请公布日期 |
2012.10.04 |
申请号 |
US201213494076 |
申请日期 |
2012.06.12 |
申请人 |
ARVIV ELIAHOU;BRIKER DANIEL;ZILBERMAN GENNADY;AGERE SYSTEMS INC. |
发明人 |
ARVIV ELIAHOU;BRIKER DANIEL;ZILBERMAN GENNADY |
分类号 |
H04B1/707 |
主分类号 |
H04B1/707 |
代理机构 |
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地址 |
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