Process for estimating the channel from the PSS signal in a LTE communication network, and receiver for the same

Abstract

A Method for estimating the channel in a Long Term Evolution (LTE) communication system, said method involving the step of extracting a Primary Synchronization Signal (PSS) from a received signal and further involving the step of spanning said PSS based Least Square (LS) channel estimation on the 64 sub-carriers so as to facilitate the MMSE channel estimation. Preferably, the spanning is performed by means of an interpolation of the particular sub-carriers which are not allocated to said PSS (#-32, d.c.) The method involves the steps of: —Perform LS channel estimation on the 62 sub-carriers containing the PSS (40) —reconstruct the LS channel estimation on the 64 central sub-carriers by interpolating (41) on subcarriers not allocated to said PSS; —Apply (42) an Inverse DFT or Inverse Fast Fourrier Transform —Extract (43) the L first samples, with L corresponding to the length of the channel; —multiply (44) by (FLHFL+σ2Ch−1)−1 —Zero-pad (45) the resulting signal to length 64; —Apply (46) a DFT or an FFT.

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