| 摘要 |
<p>A method of characterising a modulated carrier signal comprising: (a) repetitively sampling at time spaced intervals the in band amplitude dispersion of the signal; (b) accumulating first counts of numbers of occurrences of respective in band dispersion values over a range of said values; (c) monitoring a parameter indicative of signal quality of a signal obtained by decoding said modulated carrier signal; (d) accumulating second counts of numbers of occurrences of respective in band amplitude dispersions of values within said range, and which last mentioned in hand amplitude dispersions at least substantially coincide with the value of said parameter crossing a predetermined level; and (e) dividing the second counts for each said in band amplitude dispersion value by the first count therefor, to obtain respective divided counts each representative of the probability that, at the respective in band amplitude dispersion value, the value of said parameter will cross said predetermined level.</p> |
