| 摘要 |
This publication discloses a radiosonde system, a radiosonde system receiver and a signal processing method for use in a radiosonde system. The radiosonde system comprises at least one radiosonde ( 1 ) with means for acquisition of position and/or weather data and means for downstream transmission of the data over a radio-frequency path, signal capture means ( 2, 3 ) for reception of the weather and/or position data, and receiver means ( 4 ) for processing the received signals, the receiver means including RF circuit elements ( 11 ) for downconversion of the received signal frequency to a lower frequency known as the first intermediate frequency. According to the invention, the receiver means ( 4 ) include sampling means ( 12 ) performing sampling at the intermediate frequency, at least two digital mixer means ( 13 ) for selective filtration of desired frequency bands from the sampled signal, and processor means ( 14 ) for parallel signal processing at the desired frequency bands.
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