Radio receiver

Details Radio receiver Radio receiver

2006-11-21

2006-11-21

Kim, Kevin (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S347000

Reexamination Certificate

active

07139307

ABSTRACT:
A despreader106(107) provides despread processing to baseband signals based on timing from a searcher105to obtain a baseband signal of path1(path2). A complex correlation section115(116) provides complex correlation processing to the baseband signals from the despreader106(107) (baseband signals, which are not yet multiplied by an inverse characteristic of a channel estimation value from a channel estimating section108). A path combining section117combines the signals subjected to complex correlation processing by the complex correlation sections115and116.A phase estimating section118estimates a phase rotation amount caused by a frequency offset using the signal combined by the path combining section117.

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Supplementary European Search Report dated Dec. 1, 2004.
Mauss, O. C. et al., “Carrier Frequency Recovery for a Fully Digital Direct-Sequence Spread-Spectrum Receiver: A Comparison,” Personal Communication—Freedom Through Wireless Technology, Proceedings of the Vehicular Technology Conference, New York, IEEE, vol. CONF. 43, pp. 392-395, XP000393204, ISBN: 0-7803-1267-8, May 18, 1993.

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