Abstract: A ZIF radio compensation method is disclosed. The ZIF radio compensation method employs high gain setting compensation values, which are reliably calculated for low gain settings, during entry of the radio into a communications network. Once the network entry is complete, these coarse calibration values are refined during times when no interfering signal is present. The ZIF radio compensation method allows a receiver to use no additional circuitry to achieve isolation, for potential cost savings. The ZIF radio compensation method further speeds up initial calibration, allowing the radio to join the communications network more rapidly.

Abstract: A ZIF radio compensation method is disclosed. The ZIF radio compensation method employs high gain setting compensation values, which are reliably calculated for low gain settings, during entry of the radio into a communications network. Once the network entry is complete, these coarse calibration values are refined during times when no interfering signal is present. The ZIF radio compensation method allows a receiver to use no additional circuitry to achieve isolation, for potential cost savings. The ZIF radio compensation method further speeds up initial calibration, allowing the radio to join the communications network more rapidly.

Abstract: The invention includes a method and system for automatic gain compensation in an ultrasound imaging system. The method and system may be used in place of, or in addition to, gain compensation selected by an operator. Gain compensation may be in response to range, in response to cross-range, or in response to both. Ultrasound imaging data is partitioned into relatively small zones (such as regions selected in response to range and cross-range), and a zone intensity value representative of each zone is used to determine information, such as an average image intensity, about ultrasound signals reflected from objects being imaged in each zone. The zone intensity value can be determined during real-time image acquisition by special-purpose averaging hardware, so that a commercial programmable microprocessor may operate on the zone intensity values to generate a gain compensation curve, also in real-time.