| 摘要 |
<p>Phase modulation control techniques and supporting apparatus are disclosed, which avoid phase discontinuity at the outset of RF signal generation. Such discontinuities might arise from phase control instabilities associated with transmit start up or from abrupt changes in phase at the beginning of transmit signal generation. A transmitter uses starting phase values in advance of transmit data phase values to initialize phase modulation control circuits or functions. Once phase control has been stabilized, and other possible criteria have been met, the transmitter transitions from using the starting phase values to using data phase values. The phase modulation control techniques described herein apply to transmitters which employ direct phase modulation for the generation of RF signals, and may have particular applicability to burst-type RF transmitters, such as a transmitter which enploys direct modulation of amplitude in an EDGE communication system.</p> |
