The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2014
Filed:
Feb. 15, 2011
Issam Toufik, Juan les Pins, FR;
Andrea Ancora, Nice, FR;
Issam Toufik, Juan les Pins, FR;
Andrea Ancora, Nice, FR;
ST-Ericsson SA, Plan-les-Ouates, CH;
Abstract
Process for canceling Intercarrier Interference in a OFDM receiver receiving OFDM blocks in presence of Doppler, comprising the steps of: receiving a OFDM block comprising N samples; applying a FFT for the purpose of generating N frequency domain representations composing the received signal (R); multiplying said received signal (R) by the hermitian value of the channel (H), with H being the channel estimate; applying on said received signal a preconditioned conjugate gradient algorithm based on a N×N P preconditioner matrix; Characterized in that said preconditioner matrix is computed at follows: Formula (19) and formula (20), where formula (I) is a L×PN selection matrix obtained by extracting a predetermined number (L) of rows from the identity matrix I, LFIR being a predetermined integer inferior to PN, with p corresponding to the basis expansion order chosen and N is the FFT size; formula (II) is equal to HF, with H being the frequency-domain channel matrix and F being the N×N discrete-Fourier transform unitary matrix F; formula (III) is the N×N identity matrix; formula (IV) is the varience of the noise; formula (V) is being the 1×N vector containing 1 in n-th position and 0 elsewhere.