Interference detection and avoidance technique
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United States of America Patent
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-
Oct 16, 2001
Grant Date -
N/A
app pub date -
Jul 27, 1998
filing date -
Jul 27, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The presence of interfering continuous-wave signals are automatically detected in the demodulated output of a quadrature amplitude modulation data communications receiver. The transmitter is re-tuned in order to avoid the detected interferer. Statistical information concerning the received signal is accumulated at a receiver and is analyzed to determine whether a reduction in the received bit-error-rate is due to the presence of an interferer. If an inteferer is determined to be present within the signal transmission bandwidth, then the potentially available transmission band is spectrum analyzed to find a new portion of that band in which the signal can be transmitted free of the interferer. The results of the statistical analysis and the spectral analysis are conveyed back to the transmitter which then readjusts the transmission parameters and forwards the new parameters to the receiver. The system resumes operation in the new transmission band with no interference and with the bit-error-rate restored to its required level.
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