Receiver of a CDMA system with a path alignment circuit

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C375S148000

Reexamination Certificate

active

07839917

ABSTRACT:
A receiver of a CDMA system, receiving a signal transmitted through a multi-path channel, with a path alignment circuit is disclosed. The path alignment circuit has a pack-based memory device serially inputting samples of low over-sampling rate than that required by the CDMA system and outputting data packs pack by pack to reduce access rate of the memory device. In addition, the path alignment circuit has an interpolation device which reads the data packs from the memory device and performs interpolation to raise the resolution of the low over-sampling samples and generate interpolated samples of high resolution for de-spreading requirement of the CDMA system.

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Kawamura et al., Adaptive Transmission Timing Control Using Reservation Packet in Reverse Link for Broadband DS-CDMA Wireless Access,2003, 58th IEEE Vehicular Technology Conference, vol. 2, pp. 877-881.

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