And here's my LTE thought of the day:
One of the fascinating things about the 3G/WCDMA/HSPA uplink is the 1500 power control commands per second to ensure all devices transmitting at the same time are received with a similar power level. This is necessary as only this way the base stations can retrieve the individual data streams that are stacked on each other in the code/power domain.
With LTE, however, such a fast power control is no longer required as each mobile sends at a different time or uses different subcarriers (i.e. different time / frequency domains). While it is still necessary that all transmitting devices are received by the base station with "more or less" the same power in order not to overload the A/D converters it is by no means as essential as before. A lot less work and signaling involved that way.