Downlink channel handling within a spread spectrum communication

Details Downlink channel handling within a spread spectrum communication Downlink channel handling within a spread spectrum communication

1997-08-29

1999-09-21

Bochure, Tesfaldet

Pulse or digital communications

Repeaters

Testing

370342, H04K 100

Patent

active

059563680

ABSTRACT:
With respect to a direct sequence, code division multiple access spread spectrum transmitter, symbol information relating to dedicated/common channels (such as the traffic or control channels) is spread to generate a plurality of corresponding dedicated/common channel intermediate signals. These intermediate signals are then summed to generate an output signal that is scrambled by a selected scrambling code. Symbol information relating to acquisition-related channels (such as synchronization information or the pilot or long code group code channels) is also spread to generate a plurality of corresponding acquisition-related intermediate signals. These acquisition-related intermediate signals are then selectively added to the scrambled output signal producing a downlink signal for multi-channel transmission over a communications medium sharing one transmission communications frequency.

REFERENCES:
patent: 5345467 (1994-09-01), Lomp et al.
patent: 5799010 (1998-08-01), Lomp et al.
patent: 5805584 (1998-09-01), Kingston et al.
EPO Standard Search Report No. RS 100267 US, dated Mar. 2, 1998.
Baier, Alfred, et al., "Design Study for a CDMA-Based Third-Generation Mobile Radio System", IEEE Journal on Selected Areas in Communications, vol. 12, No. 4, May 1994, pp. 733-743.
Higuchi, Kenichi, et al. "Fast Cell Search Algorithm using Long Code Masking in DS-CDMA Asynchronous Cellular System", Technical Report of IEICE, Jan. 1997, pp. 1-6 (with translation).

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