Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-02-13
2007-02-13
Ha, Dac V. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S148000, C375S267000, C375S343000, C375S349000, C370S342000, C370S441000, C370S479000
Reexamination Certificate
active
10147974
ABSTRACT:
A demodulator of a W-CDMA base station comprises: a chip calculator for de-spreading signals received through sectors including antennas; a symbol calculator for using symbols of a control channel and a data channel from the de-spread signals, estimating a channel, and combining signals input through a multi-path; a frame calculator for combining the combined signals to perform transport format combination indicator decoding, feedback information decoding, frame sync estimation, SNR estimation, post-combining, and second de-interleaving; a storage unit for storing outputs of the chip calculator, symbol calculator, and frame calculator; a storage unit controller for controlling inputs/outputs between the chip calculator, symbol calculator, frame calculator, and storage unit; and a host interface for controlling inputs/outputs between the chip calculator, symbol calculator, frame calculator, and host.
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Kwang Soon Kim; A Data-Aided Channel Esimation Technique For Coherent DS/CDMA Systems Using Maximum Doppler Frequency Estimation and Blind Spreading Factor Detection; Research Paper of Radio and Broadcasting Technology Lab., Electronics and Telecommunications Research Institute;pp. 1-4.
Electronics and Telecommunication Research Institute
Ha Dac V.
Mayer Brown Rowe & Maw LLP
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