Patent ID: 8873504

Claim:
A method for channel estimation in a baseband integrated circuit (BBIC), the method comprising: receiving information signals comprising reference signals and at least one of control signals provided by physical control channels and data signals provided by physical data channels; wherein the information signals correspond to resource elements indexed at a base-station using a resource grid having a frequency direction and a time direction, wherein, within the resource grid, resource elements are identified by subcarrier number in the frequency direction and symbol number in the time direction; determining a latency requirement for each of a physical channel having resource elements for which channel response estimates are required; filtering available reference signals in the frequency direction of the resource grid to obtain initial channel response estimates at each subcarrier frequency for symbols containing reference signals; selecting, using the latency requirement and a symbol number corresponding to each of the available reference signals, a number of initial channel response estimates from among the filtered available reference signals; identifying, for each resource element, a corresponding set of pre-optimized filter coefficients to be used to compute a second channel response estimate utilizing at least one of (a) the latency requirement, (b) a channel condition, and (c) an availability and position of reference signals within the resource grid; and filtering the number of initial channel estimates in the time direction by performing a complex multiply of the number of initial channel estimates by a corresponding set of pre-optimized filter coefficients for each resource element in order to compute the second channel response estimate.