Patent ID: 7965796

Claim:
Receiver apparatus for computing channel estimates from a received signal having a slotted structure, each slot comprising a sequence of data symbols and a sequence of pilot symbols, the receiving apparatus including: M summers for respectively summing the pilot symbols of each of M slots, where M is greater than 1 and the M summers produce respective M outputs x(i); J interpolation filters each arranged to receive the outputs x(i) as inputs, where J specifies a chosen number of time instances of one of the M slots; a computation module connected to each of the J interpolation filters for computing respective filter coefficients, Fj,i, therefor depending upon the chosen number of time instances Tj relating to said one of the M slots, time instances of the pilot symbols and a chosen polynomial interpolation order N greater than 2; whereby each of the J interpolation filters is configured to compute a channel estimate, ChanEst j = ∑ i = 0 M - 1 ⁢ F j , i ⁢ x ⁡ ( i ) for one of said chosen number of time instances Tj, where j takes a value 0, . . . , J−1.