Patent ID: 8873681
Filing Date: 2014-10-28
Classification: H04L

Abstract:
1. A process for canceling Intercarrier Interference in a OFDM receiver comprising digital signal processing circuits, said OFDM receiver receiving OFDM blocks in presence of Doppler, said process comprising the steps of: receiving a OFDM block, said OFDM block comprising N samples; applying, by said digital signal processing circuits, a Fast Fourier Transform (FFT) on said OFDM block for the purpose of generating N frequency domain representations composing the received signal; multiplying said received signal by the hermitian value of the channel by said digital signal processing circuits, with H being the channel estimate; and applying on said received signal a preconditioned conjugate gradient algorithm based on a N×N P preconditioner matrix by said digital signal processing circuits; wherein said preconditioning matrix is computed as follows: And Where S I is the N×N identity matrix; σ is the varience of the noise; and 1