Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1974-12-02
1976-06-15
Griffin, Robert L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
325 40, 325304, 3401461AG, H04B 702
Patent
active
039639886
ABSTRACT:
A circuit arrangement in a data transmission system for selecting a diversity channel is described. The transmitted information and parity bits are applied in the receiver, over a channel switch and a code frame switch in serial fashion, to a parity bit register and an information bit register. Inputs to a first parity stage are connected to outputs of a number of cells of a first part of the parity bit register and to n1 cells of a first part of the information bit register. A code frame switch connects each channel to a second part of the parity bit register and a second part of the information bit register. A number of cells of the second part of the information bit register and the output of the first parity stage are connected to a further parity stage assigned to each diversity channel. The outputs of the further parity stages are connected to a quality evaluation stage which produces control signals with which the channel switch switches through one of the diversity channels.
REFERENCES:
patent: 3628149 (1971-12-01), Swan
patent: 3665395 (1972-05-01), Bochmann
patent: 3781794 (1973-12-01), Morris
patent: 3829777 (1974-08-01), Muratani et al.
Griffin Robert L.
Ng Jin F.
Siemens Aktiengesellschaft
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