Adaptive Data Recovery

• US 20160006467A1
• Filed: 09/14/2015
• Published: 01/07/2016
• Est. Priority Date: 12/12/2011
• Status: Active Grant

• Current Assignee: John W. Bogdan
• Original Assignee: John W. Bogdan
• Inventors: Bogdan, John W.
• Granted Patent: US 9,584,171 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H03H 17/0251 Comb filters
• CPC Class Codes: H03H 17/04 Recursive filters
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0091 arrangements specific to receivers, e.g. format detection detection of data rate H04L25/0262; detection of coding rate H04L1/0046
• CPC Class Codes: H04L 25/023 with extension to other symbols
• CPC Class Codes: H04L 25/03012 operating in the time domain H04L25/03165, H04L25/03178 take precedence
• CPC Class Codes: H04L 25/0398 Restoration of channel reciprocity
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2695 with channel estimation, e.g. determination of delay spread, derivative or peak tracking channel estimation H04L25/0202
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 7/0079 Receiver details

Abstract

This application presents an adaptive data recovery (ADR) of original data symbols from intervals or parameters of tone signals derived from a received OFDM signal, conducted without compensating distortions or noise introduced to the received OFDM signal by an OFDM transmission channel. Such ADR is implemented by converting back the derived intervals or parameters into original data symbols corresponding to distinctive sets of the intervals or parameters which the derived intervals or parameters belong to.

Claims

1. A method for adaptive data recovery (ADR) from a received orthogonal frequency division multiplexing (OFDM) signal, produced by a circuit for an original data coding converting transmitted data symbols into a transmitted OFDM signal and a transmission system transforming the transmitted OFDM signal into the received OFDM signal wherein the transformation introduces distortions and noise to the received OFDM signal, by an adaptive data decoding of the transmitted data symbols from intervals of tone signals of the received OFDM signal wherein the intervals of the tone signals correspond to cycles or half-cycles of the tone signals;

wherein the ADR method comprises the steps of;

defining distinctive sets of the intervals of the tone signals wherein each of the distinctive sets comprises the intervals of the tone signals representing a one of the transmitted data symbols;

defining the adaptive data decoding by specifying the transmitted data symbols corresponding to the distinctive sets, in order to enable a reversal of both the original data coding and the transformation of the transmitted OFDM signal into the received OFDM signal without compensating effects of the distortions or the noise on the tone signals;

producing, using a received signal processor, the intervals of the tone signals from the received OFDM signal;

applying the adaptive data decoding to the produced intervals of the tone signals by identifying the distinctive sets of the intervals of the tone signals which the produced intervals of the tone signals belong to and recovering the transmitted data symbols which have been specified as corresponding to the identified distinctive sets.

2. A method for adaptive data recovery (ADR) from a received orthogonal frequency division multiplexing (OFDM) signal, produced by a circuit for an original data coding converting transmitted data symbols into a transmitted OFDM signal and a transmission system transforming the transmitted OFDM signal into the received OFDM signal wherein the transformation introduces distortions and noise to the received OFDM signal, by an adaptive data decoding of the transmitted data symbols from parameters of tone signals of the received OFDM signal;

wherein the ADR method comprises the steps of;

defining, using a background processor, distinctive sets of the parameters wherein each of the distinctive sets comprises the parameters representing a one of the transmitted data symbols;

defining, using the background processor, the adaptive data decoding by specifying the transmitted data symbols corresponding to the distinctive sets, in order to enable a reversal of both the original data coding and the transformation of the transmitted OFDM signal into the received OFDM signal without compensating effects of the distortions or the noise on the tone signals;

producing, using a real time processor, the parameters from the received OFDM signal wherein the produced parameters correspond to amplitudes or phases of the tone signals, wherein operations of the real time processor are controlled by the background processor;

applying the adaptive data decoding to the produced parameters by identifying the distinctive sets of the parameters which the produced parameters belong to and recovering the transmitted data symbols which have been specified as corresponding to the identified distinctive sets.

3. A method for adaptive data recovery (ADR) from a received orthogonal frequency division multiplexing (OFDM) signal, produced by a circuit for an original data coding converting transmitted data symbols into a transmitted OFDM signal and a transmission system transforming the transmitted OFDM signal into the received OFDM signal wherein the transformation introduces distortions and noise to the received OFDM signal, by an adaptive data decoding of the transmitted data symbols from parameters of tone signals of the received OFDM signal;

wherein the ADR method comprises the steps of;

defining distinctive sets of the parameters wherein each of the distinctive sets comprises the parameters representing a one of the transmitted data symbols;

defining the adaptive data decoding by specifying the transmitted data symbols corresponding to the distinctive sets, in order to enable a reversal of both the original data coding and the transformation of the transmitted OFDM signal into the received OFDM signal without compensating effects of the distortions or the noise on the tone signals;

producing, using a received signal processor, the parameters from the received OFDM signal wherein the produced parameters correspond to amplitudes or phases of cycles or half-cycles of the tone signals;

applying the adaptive data decoding to the produced parameters by identifying the distinctive sets of the parameters which the produced parameters belong to and recovering the transmitted data symbols which have been specified as corresponding to the identified distinctive sets.