FIELD: informing about changes in location of guarded objects relative to user guarding them.
SUBSTANCE: device intended to ensure simultaneous control of a number of objects and their identification, pre-warning about probable loss of contact with guarded objects depends for its operation on using noise-like signal and makes it possible to divide signals acting in same frequency band and within same time intervals using their selection by shape, that is to solve problem of channel frequency multiplexing actually excluding impact of such devices on each other and also impact of noise on other radio systems, to enhance quantity of objects controlled (guarded) simultaneously, for instance by varying pseudorandom sequence when generating noise-like signal.
EFFECT: enlarged functional capabilities.
1 cl, 1 dwg
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Authors
Dates
2004-08-10—Published
2003-02-27—Filed