| 摘要 |
<p>A digitally modulated signal is conditioned, such as to facilitate amplification. The digitally modulated signal is derived from an information signal (110, 115) which is mapped (120) onto a symbol constellation to generate a sequence of channel symbols (125). The sequence of channel symbols (125) is processed (410) to provide a conditioned signal (415) having a signal envelope that avoids signal envelope magnitudes below a threshold value (500). From a signal envelope representing the sequence of channel symbols, symbol interval minimum values are determined as the signal envelope transitions through successive channel symbols of the sequence (510). The conditioned signal (415) is represented by localized adjustment of the signal envelope, such as the insertion of an adjustment pulse, to increase a particular symbol interval minimum value, when that value is below the threshold value (520, 530, 540, 545, 555).</p> |
