Pulse or digital communications – Repeaters – Testing
Patent
1989-09-29
1991-01-08
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04K 100
Patent
active
049842471
ABSTRACT:
A base station (BS) and mobile user stations (MS) each with a transmitter (S), a receiver (E) for multipath reception and a control unit (ST) are provided in each cell. Exactly one set of several sequence sets of the auxiliary function used for spectrum spreading is allocated to each cell. Sequences of several sets in pairs have the property that the absolute values of the normalized periodic cross-correlation functions are much smaller than one and for sequences within a set the cross-correlation function in pairs is optimally small around the zero point. Data synchronous generation of the transmission signals takes place in the base station (BS) for all simultaneous connections and the data clock of the received signal is used as data clock of the transmission signal of the user station (MS).
Application for digital data transmission in buildings and local areas for the configuration of a so called cordless LAN are considered.
REFERENCES:
patent: 4189677 (1980-02-01), Cooper et al.
patent: 4222115 (1980-09-01), Cooper et al.
patent: 4355399 (1982-10-01), Timor
patent: 4392231 (1983-07-01), Henry
patent: 4479226 (1984-10-01), Prabhu et al.
patent: 4554668 (1985-11-01), Deman et al.
Grob Urs
Kaufmann Hans
Kueng Roland
Welti Arnold
Ascom Zelcom AG
Cangialosi Salvatore
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