| 摘要 |
<p>A mobile wireless communication device (10) having a direct conversion receiver (20) reduces spurious mixer response by predicting blockers on the received RF signal. The chopping frequency of the mixer is changed dynamically in response to the prediction of blockers on the input signal to avoid mixing the blockers with chopper spurs, thereby improving the receiver response. In some embodiments, the mixer is disabled momentarily to verify that poor signal quality results from mixing chopper spurs with blockers. In hopping mode applications, the chopper frequency is changed only on channels having a low confidence factor.</p> |
