Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Patent
1992-04-27
2000-06-20
Chin, Stephen
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
34082544, 455382, 455383, 371 58, H04L 700
Patent
active
060786310
ABSTRACT:
A wireless communication system containing at least one transmission apparatus and at least one communication terminal. The transmission apparatus transmits a wireless signal representing a bit sequence containing at least a predetermined number of bit errors, to the communication terminal. The communication terminal receives the wireless signal to regenerate the bit sequence. The communication terminal then examines the bit sequence represented by a received wireless signal to determine whether or not the number of bit errors contained in the bit sequence is equal to or greater than a predetermined number. When it is determined that at least the predetermined number of bit errors are contained in the bit sequence represented by a received wireless signal, the operation of the communication terminal is made inactive. Further, the transmission apparatus may transmit a wireless signal representing a bit sequence containing no pattern coinciding with a predetermined frame synchronization pattern, to the communication terminal. The communication terminal receives the wireless signal to regenerate the bit sequence. The communication terminal then examines the bit sequence represented by a received wireless signal to determine whether or not the bit sequence contains the predetermined frame synchronization pattern. When it is determined that the bit sequence does not contain the predetermined frame synchronization pattern, the operation of the communication terminal is made inactive.
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Sasaki Norio
Yabe Toshihiro
Chin Stephen
Fujitsu Limited
Webster Bryan
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