Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-03-20
2007-03-20
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000, C375S150000, C375S316000, C375S317000
Reexamination Certificate
active
10211416
ABSTRACT:
A multipath searching device includes a radio front-end for converting a received radio signal into a baseband signal and for outputting the baseband signal. A profile calculating unit is included for calculating and outputting the multipath profile of the baseband signal. A first detector determines whether or not the radio signal traveled along a multipath is having a short-delay path by comparing the peak value of the multipath profile with a profile value of a predetermined position time interval before or after the peak of the multipath profile. A path selector receives the multipath profile and the detection result of the first detector, generates time delay information for each path, and separates many paths along which the radio signal traveled. A receiving unit receives the time delay information of the paths, despreads the baseband signal, and combines despread signals.
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A New Multipath Searcher for Direct Sequence Spread Spectrum Systems in Short Delay Channels, 4 pages.
Eo Ik-soo
Han Kyung-tae
Jung Hae-bum
Kim Kyung-soo
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Ghebretinsae Temesghen
Torres Juan Alberto
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