Transmitting facility and receiving facility for a...

Multiplex communications – Communication over free space – Combining or distributing information via code word channels...

Reexamination Certificate

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C370S441000

Reexamination Certificate

active

07016335

ABSTRACT:
The object of the invention is to provide an acquisition method for a multipoint-to-point CDMA network (NET) that minimizes the influence of the acquisition procedure on the information transmission. The acquisition signals are encoded in a specific acquisition code that differs from the CDMA communication code of the information signals. In addition, the acquisition signals are transmitted with an amplitude smaller than that of the information signals. At the receiving end, the acquisition signals are detected by correlation (11) and subsequent accumulation (12). This method maximizes the transmission capacity of the information signals. In addition, the acquisition time is reduced since adaptive contention-resolving techniques can be employed taking account of the estimated number of colliding terminals (2, 3, 4, 5).

REFERENCES:
patent: 5299236 (1994-03-01), Pandula
patent: 5563883 (1996-10-01), Cheng
patent: 5577025 (1996-11-01), Skinner et al.
patent: 5715521 (1998-02-01), Fukasawa et al.
patent: 5841768 (1998-11-01), Ozluturk et al.
patent: 5914943 (1999-06-01), Higuchi et al.
patent: 6061359 (2000-05-01), Schilling et al.
patent: 0678991 (1995-10-01), None
patent: WO 97/08861 (1997-03-01), None

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