Systems and methods for providing timing tracking loops in a communication system

摘要

Various embodiments are disclosed for providing timing tracking loops in a communication system. A communication system includes a delay locked loop (DLL) comprising a maximum region detector configured to identify a target channel profile comprising at least a portion of the multipath signals based on the timing information, the maximum region detector further configured to apply a weight vector to each channel tap in the target channel profile and determine a tap with a maximum power level relative to remaining channel taps in the channel profile. The system further comprises a window timing loop (WTL) adjuster configured to track a position of a channel estimation window (CEW) within an observation window corresponding to the maximum channel energy level, where the maximum channel energy level corresponds to the sum of the energy of all the taps for a given window.

主权项

1. A method for performing channel tap estimation in a communication device, comprising:
receiving multipath signals from a transmitter and determining timing information based on the multipath signals; based on the timing information, identifying a target channel profile comprising at least a portion of the multipath signals; applying a weight vector to each of a plurality of channel taps in the target channel profile; determining a regional power level of each respective channel tap of the plurality of channel taps, the regional power level of one of the plurality of channel taps being determined based at least on a sum of a power level of a channel tap located before the one of the plurality of channel taps in the target channel profile and a power level of a channel tap located after the one of the plurality of channel taps in the target channel profile; determining one of the plurality of channel taps having a largest regional power level relative to the plurality of channel taps in the target channel profile; and generating a timing reference based on the determined one of the plurality of channel taps having the largest regional power level, the time reference for estimating delays associated with the multipath signals.