Direct Data Recovery
AssigneeJohn W. Bogdan
InventorJohn W. Bogdan
Life of this patent
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Abstract
The direct data recovery (DDR) uses adaptive data decoding (ADD) to combine a conventional reversal of data coding made on a transmit side with a reversal of received signal distortions introduced by a transmission channel; wherein both such reversals are achieved by the same conversion of a sub-range parameter or a referencing subspace (corresponding to said received signal) into data transmitted originally, by applying an ADD step comparing said sub-range parameter or referencing subspace with its reference or reference frame and using a result of such comparison for addressing a Content Addressed Memory (CAM) outputting recovered data.
Claims2
A method and system for direct data recovery using parameters of sub-band cycles (DDR PSBC) wherein such DDR PSBC recovers transmitted data symbols from a signal received from an OFDM transmission channel which includes a data coding circuit encoding transmitted symbols into transmitted OFDM frames, a transmission link transforming said transmitted frames into subspaces of received OFDM frame wherein the transmission link introduces deterministic or random distortions affecting said frame subspaces and a processor transforming said frame subspaces into subranges of amplitudes/phases of cycles or half cycles of sub-band signals of said received frame, wherein specific said amplitudes/phases subranges correspond to specific said transmitted symbols;
- wherein the DDR PSBC comprises:
- deriving an inverse transformation reversing a transfer function of said transmission channel, in order to enable said recovery of said transmitted symbols from said amplitudes/phases subranges;
- wherein such derivation includes producing references defining said amplitudes/phases subranges and an assignment of said specific transmitted symbols as corresponding to said specific amplitudes/phases subranges;
- processing a particular said received frame in order to estimate particular said amplitudes/phases of cycles or half cycles affected by the distortions introduced by the transmission link;
- using said references for identifying particular said amplitudes/phases subranges comprising the particular amplitudes/phases of cycles or half cycles,
- in order to utilize said assignment for recovering particular said transmitted symbols corresponding to the particular said received frame.
A method and system for direct data recovery using parameters of sub-bands (DDR PSB) wherein DDR PSB recovers transmitted data symbols from a signal received from an OFDM transmission channel which includes a data coding circuit encoding transmitted symbols into transmitted OFDM frames, a transmission link transforming said transmitted frames into subspaces of received OFDM frame wherein the transmission link introduces deterministic or random distortions affecting said frame subspaces and a processor transforming said frame subspaces into subranges of amplitudes/phases of sub-bands of said received frame, wherein specific said amplitudes/phases correspond to specific said transmitted symbols;
- wherein the DDR PSB comprises:
- deriving an inverse transformation reversing a transfer function of said transmission channel, in order to enable said recovery of said transmitted symbols from said amplitudes/phases subranges;
- wherein such derivation includes producing references defining said amplitudes/phases subranges and an assignment of said specific transmitted symbols as corresponding to said specific amplitudes/phases subranges;
- processing a particular said received frame in order to estimate particular said amplitudes/phases affected by the distortions introduced by the transmission link;
- using said references for identifying particular said amplitudes/phases subranges comprising the particular amplitudes/phases,
- in order to utilize said assignment for recovering particular said transmitted symbols corresponding to the particular said received frame.
Dependencies are inferred from the claim text.