Method of symbol index selection in code division multiple...

Details Method of symbol index selection in code division multiple... Method of symbol index selection in code division multiple...

2007-09-11

2007-09-11

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C375S141000, C375S142000, C375S147000, C375S148000, C375S150000, C375S151000

Reexamination Certificate

active

10359472

ABSTRACT:
A method and device for estimating a target chip index value in a code-division multiple access receiver. The receiver receives signals from a transmitter that uses a plurality of transmitted chips for data transmission through a plurality of multipath channels. As each channel is expressible as a channel impulse response at a given instant in time, the impulse response can be sampled and the samples indexed by a plurality of delay sample indices. The target chip index value can be determined based on the first moment of the delay sample indices over an impulse response.

REFERENCES:
patent: 4620192 (1986-10-01), Collins
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“Chip-Interleaved Block-Spread Code Division Multiple Access”; Zhou et al.; IEEE Transactions on Information Theory, vol. 50, No. 2; Feb. 200296; pp. 235-248.
“Simple MMSE Equalizers for CDMA Downlink to Restore Chip Sequence: Comparison to Zero-Forcing and Rake”; Krauss et al.; ICASSP; 2000; pp. 2865-2868.
“Downlink Channel Decorrelation in CDMA Systems with Long Codes”; Werner et al.; VTC 1999-Fall—50th IEEE International Vehicular Technology Conference, Amsterdam, Netherlands; Sep. 19-22, 1999; pp. 1614-1617.

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