Communication method for an adaptive direct sequence CDMA commun

Details Communication method for an adaptive direct sequence CDMA commun Communication method for an adaptive direct sequence CDMA commun

1993-06-07

1994-10-04

Gregory, Bernarr E.

Pulse or digital communications

Repeaters

Testing

380 34, 370 18, 375 11, 375 12, 375 14, H04L 2730

Patent

active

053533003

ABSTRACT:
A communication method in an adaptive CDMA communication system (100) capable of communicating a direct sequence spread spectrum communication signals which comprise bit sequences coded with spreading chip sequences. The method includes the steps of transmitting a DS-SS communication signal (30) having a training bit sequence (31) coded with spreading chip sequence. The method includes the step of despreading the DS-SS communication signal based on the training bit sequence (31) during a training interval. The DS-SS communication signals is despread by adaptively determining a despreading chip sequence. Then, following the training interval determining chip timing offset during a chip timing interval. Finally, bit timing offset is determined during a bit timing interval following the chip timing interval.

REFERENCES:
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
U. Madhow et al, "Error Probability and Near-Far Resistance of Minimum Mean Squared Error Interference Suppression Schemes for CDMA"; Proc. S of the First Intl. Conf. on Universal Personal Communication; Dallas, Sep. 1992; pp. 1339-1343; IEEE No. 0-7803-0608-Feb. 1992, $3.00.
Cook, C. E., Marsh, H. S., "An Introduction to Spread Spectrum," IEEE #0163-6804-83/-300-0008, Mar. 1983, pp. 8-16.

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