Data Recovery using Gradients

A method and a system for data recovery using gradients (DRG) of sub-carriers of a received orthogonal frequency division multiplexing (OFDM) signal, using a Received Signal Processor (RSP) for deriving the gradients, a Programmable Control Unit (PCU) analyzing the received OFDM signal and controlling operations of an Adaptive Data Decoder (ADD) identifying subranges of the derived gradients and recovering data;

• wherein the DRG comprises the steps of:
• recovering, by using RSP, the sub-carriers;
• deriving, by using RSP, the gradients by using integrals of samples of the recovered sub-carriers surrounding a middle one of the samples;
• wherein amplitudes of previous the samples are subtracted from amplitudes of following the samples shifted forward by the same number of sampling periods as the previous samples are trailing such middle sample;
• wherein any one of the integrals of the samples is derived by adding all results of such subtractions made over a proper part of a sub-carrier cycle surrounding the middle sample;
• defining, by using PCU, an assignment of the transmitted data symbols to the subranges of the gradients;
• identifying, by using ADD, the defined subranges which the derived gradients belong to;
• recovering, by using ADD, the transmitted data symbols by applying the defined assignment of the data symbols to the identified defined subranges.