Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

Abstract: Systems and methods for improving network performance. A method of transmitting packet data across a network includes a transmitting network device establishing a reservation to transmit traffic to a plurality of wireless receiving network devices across a network; the transmitting network device transmitting a sequence of packets across the network, wherein a packet of the sequence of packets includes data requesting the receivers acknowledge receipt of the packet; the transmitting network device waiting for a predetermined time to receive acknowledgement of receipt of the packet from the wireless receiving network devices; the transmitting network device retransmitting a packet across the network only if it does not receive an acknowledgement for that packet from any of the wireless receiving network devices within the predetermined time.

Abstract: A system, a wireless telecommunication device, a method and a computer program are provided. The system comprises: a frequency generator for supplying a frequency reference for the wireless telecommunication device, the frequency generator further being configured to generate a first frequency and a second frequency simultaneously, the first frequency having a first response to the temperature of the frequency generator and the second frequency having a second response to the temperature of the frequency generator, the second response being different from the first response; a temperature parameter generator, connected to the frequency generator, configured to generate a temperature parameter proportional to the temperature of the frequency generator by using the first frequency and the second frequency; and a frequency controller configured to adjust the frequency reference on the basis of the temperature parameter.