| 摘要 |
<p>In a system for controlling for gain and phase errors due to mismatches between signal channels in direct conversion receiver having a pair of signal channels carrying I and Q baseband component signals which are in quadrature, new I min and Q min signals are generated (116,117) which may be viewed as analogs of the I and Q baseband components but which are related to twice the phase angle defined by the original I and Q baseboard components signal components. Phase angles theta A and theta B are determined (120,122) based on the original I and Q baseband components signals and the new I min and Q min signals. An error signal theta E is then formed (123) from these signals which can be analyzed (124) to determine the gain and phase errors g and p affecting the I and Q baseband components. These components can then be adjusted (101,102,103) to correct for gain and phase errors g and p in order to compensate for hardware mismatches between the signal channels in the receiver. <IMAGE></p> |
