System for the estimation of the complex gain of a transmission channel
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United States of America Patent
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Sep 2, 2003
Grant Date -
N/A
app pub date -
Feb 24, 2000
filing date -
Feb 26, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for the estimation of the complex gain of a transmission channel is designed for parallel type modulators/demodulators that can be used in digital radio broadcasting. The system includes a given number N of sets of interpolators to estimate the gain on a useful symbol from known symbols constituting gain references evenly positioned in the transmitted signal, each set of interpolators being adapted to a particular situation of reception, ranging from a stable single-path channel to a channel with high temporal dispersion and high instability. The outputs of the interpolators are coupled to a selection device programmed to choose the set of interpolators that gives the weakest estimated noise during a specified length of time. Such a system may find application to digital radio transmission.
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