| 主权项 |
1. A method of channel estimation for symbol positions of a channel finger in a wireless communication system, the method comprising:
receiving a sequence of symbols arranged in slots, correlating the sequence of symbols with a plurality of reference symbols at reference symbol positions per slot using finger information associated with the channel finger to obtain pluralities of Nsym reference symbol correlation values per slot, wherein for each slot:
filtering the respective plurality of reference symbol correlation values using a first reference symbol filter to obtain a first filtered output per slot, the first reference symbol filter having a set of Nsym first reference symbol coefficients,filtering the respective plurality of reference symbol correlation values using a second reference symbol filter to obtain a second filtered output per slot, the second reference symbol filter having a set of Nsym second reference symbol coefficients, wherein for a plurality of anchor symbol positions:
filtering a predetermined number of Nslots first filtered reference outputs using a first slot filter with first slot-specific filter coefficients to obtain a first slot filter result, the first slot-specific filter coefficients being established in dependence on at least the first reference symbol filter, the second reference symbol filter, the reference symbol positions, the anchor symbol position, a Doppler velocity measure, a length of an equivalent channel filter, a parameterization of an auto-correlation of the channel, and, optionally, a channel noise estimate,filtering a predetermined number of Nslots second filtered reference outputs using a second slot filter with second slot-specific filter coefficients to obtain a second slot filter result,the second slot-specific filter coefficients being established in dependence on at least the first reference symbol filter, the second reference symbol filter, the reference symbol positions, the anchor symbol position, the Doppler velocity measure, the length of the equivalent channel filter, the parameterization of the auto-correlation of the channel, and, optionally, the channel noise estimate,summing the first slot filter result and the second slot filter results to obtain the channel estimate for the anchor symbol position; and wherein for symbol positions different from the anchor symbol positions:
determining two closest anchor symbol positions, anddetermining a channel estimate for the symbol position from interpolating the channel estimates for two closest anchor symbol positions. |
