Pulse or digital communications – Testing
Patent
1996-05-30
1999-08-10
Le, Amanda
Pulse or digital communications
Testing
375347, 375349, 375351, 455 673, 455137, 4552261, 455272, 371 51, H04B 346
Patent
active
059370050
ABSTRACT:
An error rate measurement apparatus for a mobile radio communications system, which quickly and accurately measures the error rate of received signals on a real-time basis with simple hardware. The apparatus is equipped with a plurality of receivers for receiving signals from a single transmission source with antennas spaced apart from each other. A bit comparator compares the received signals bit by bit and sends an error detection pulse signal to an error rate calculator if it has detected a bit error. The error rate calculator counts the number of error detection pulse signals sent from the bit comparator for a predetermined period. The error rate calculator then divides this pulse count by the number of incoming bits received during the predetermined period, and further divides the quotient by the number of reception signals that are compared by the bit comparator, thereby obtaining the error rate of the reception signal.
REFERENCES:
patent: 5483542 (1996-01-01), Nguyen
patent: 5563909 (1996-10-01), Nakazawa
patent: 5732089 (1998-03-01), Negi
Kubo Tokuro
Minowa Morihiko
Obuchi Kazuhisa
Fujitsu Limited
Le Amanda
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