Abstract: The data recovery from gradients (DRG) of sub-carriers of a received OFDM signal affected by deterministic and random distortions introduced by a transmission link, contributes a method and a system for utilizing gradients characterizing shapes of OFDM sub-carriers comprised in such OFDM signal for recovering data symbols transmitted originally.

Abstract: The Digital Time Processing using Rational Number Filters (DTP RNF) disclosed herein is contributing methods, systems and circuits for using a Precision Time Protocol (PTP) such as IEEE 1588 for distributing a master time secured by a master unit to slave units by utilizing slave clocks, synchronous to referencing frames communicated with PTP messages or compatible with them data receiver clocks, for maintaining a local slave time which is increased to a local master time by adding to it an estimate of a transmission delay derived by processing PTP messages or by other means, wherein such distribution of the master time includes filtering out phase noise of the timing referencing signals with the Rational Number Filters in order to produce accurate and stable timing implementing signals such as the slave clock, local slave time and local master time.

Abstract: The Digital Time Processing using Rational Number Filters (DTP RNF) disclosed herein is contributing methods, systems and circuits for using a Precision Time Protocol (PTP) such as IEEE 1588 for distributing a master time secured by a master unit to slave units by utilizing slave clocks, synchronous to referencing frames communicated with PTP messages or compatible with them data receiver clocks, for maintaining a local slave time which is increased to a local master time by adding to it an estimate of a transmission delay derived by processing PTP messages or by other means, wherein such distribution of the master time includes filtering out phase noise of the timing referencing signals with the Rational Number Filters in order to produce accurate and stable timing implementing signals such as the slave clock, local slave time and local master time.

Abstract: This disclosure contributes a Unified Clock which utilizes frequency alignment throughout network nodes for accurate time stamping and direct elimination of nodes residence delays from times originated in Grand Master (GM) and propagated downstream with PTP messages, wherein downstream slave nodes are maintaining local slave time (LST) delayed to the GM time by downstream links delays only and such links delays are estimated separately and added to the LST in order to derive Local Master Time (LMT) corresponding to the GM time.

Abstract: The data recovery from sub-carriers gradients (DRSG) of a received OFDM signal affected by deterministic and random distortions introduced by a transmission link, contributes a method and a circuit for utilizing gradients characterizing shapes of OFDM sub-carriers comprised in such OFDM signal for recovering data symbols transmitted originally.

Abstract: The Digital Time Processing over Time Sensitive Networks (DTP TSN) disclosed herein is contributing methods, systems and circuits for using a Precision Time Protocol (PTP) such as IEEE 1588 for distributing a master time secured by a master unit to slave units by utilizing slave clocks recovered from PTP messages and/or compatible with them data receiver clocks for maintaining a local slave time which is increased to a local master time by adding to it an estimate of a transmission delay derived by processing PTP messages, wherein such distribution of the master time includes filtering out phase noise of a timing referencing signals communicated by PTP messages in order to produce accurate timing implementing signals such as the slave clock, local slave time and local master time.

Abstract: The Digital Time Processing over Time Sensitive Networks (DTP TSN) disclosed herein is contributing methods, systems and circuits for using a Precision Time Protocol (PTP) such as IEEE 1588 for distributing a master time secured by a master unit to slave units by utilizing slave clocks recovered from PTP messages and/or compatible with them data receiver clocks for maintaining a local slave time which is increased to a local master time by adding to it an estimate of a transmission delay derived by processing PTP messages, wherein such distribution of the master time includes filtering out phase noise of a timing referencing signals communicated by PTP messages in order to produce accurate timing implementing signals such as the slave clock, local slave time and local master time.

Abstract: A Digital Time Processing (DTP) disclosed herein is contributing methods, systems and circuits for filtering out a phase noise of a timing referencing signal, producing a timing implementing signal from a free running local clock and time processing over time sensitive networks (TP TSN) enabling improved utilization of IEEE 1588 PTP and better accuracy of time distribution.

Abstract: The data recovery from sub-carriers gradients (DRSG) of a received OFDM signal affected by deterministic and random distortions introduced by a transmission link, contributes a method and a circuit for utilizing gradients characterizing shapes of OFDM sub-carriers comprised in such OFDM signal for recovering data symbols transmitted originally.

Abstract: The data recovery from sub-carriers (DRSC) of a received OFDM signal, contributes a method and a circuit for utilizing parameters of OFDM sub-carriers comprised in the received OFDM signal or subspaces comprising the OFDM sub-carriers for recovering transmitted data symbols from the received OFDM signal affected by deterministic and random distortions introduced by a transmission link.

Abstract: A Time Processing Technology (TPT) disclosed herein is contributing methods, systems and circuits for filtering out a phase noise of a timing referencing signal and producing a timing implementing signal from a free running local clock or its subclocks wherein the filtering out the phase noise is implemented with an open loop system (OLS) or a closed loop system (CLS) of phase control, wherein TPT comprises and is enabled by contributed herein a time to digital converter (TDC), a rational number filter (RNF) and a digital to time converter (DTC), securing improved resolution and open loop operations of phase control systems.

Abstract: This application presents an adaptive data recovery from distorted signals (ADRDS) of original data symbols from intervals or parameters of tone signals derived from a received OFDM signal, including responding to dynamic distortions introduced to the received OFDM signal by an OFDM transmission channel. Such ADRDS 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.

Abstract: The Synthesizing Clock of OFDM Receiver (SCOR) is comprising methods and systems for synthesizing the OFDM receiver clock from a local clock in a feed-forward configuration, wherein the local clock is aligned in frequency to a received OFDM signal by using a frequency locked loop (FLL).

Abstract: Phase synthesis techniques (PST) useful in a wide variety of communication systems based on wireless, optical and wireline links, disclose methods and circuits for a programmable synthesis of a waveform from a referencing clock with phase resolution matching a single gate delay.

Abstract: The data recovery from sub-carriers (DRSC) of a received OFDM signal, contributes a method and a circuit for utilizing parameters of OFDM sub-carriers comprised in the received OFDM signal or subspaces comprising the OFDM sub-carriers for recovering transmitted data symbols from the received OFDM signal affected by deterministic and random distortions introduced by a transmission link.

Abstract: The Direct Synthesis of a Receiver Clock (DSRC) contributes a method, system and apparatus for reliable and inexpensive synthesis of inherently stable local clock synchronized to a referencing signal received from an external source. Such local clock can be synchronized to a referencing frame or a data signal received from wireless or wired communication link and can be utilized for synchronizing local data transmitter or data receiver. Such DSRC can be particularly useful in OFDM systems such as LTE/WiMAX/WiFI or Powerline/ADSL/VDSL, since it can secure lower power consumption, better noise immunity and much more reliable and faster receiver tuning than those enabled by conventional solutions.

Abstract: Phase synthesis techniques (PST) useful in a wide variety of communication systems based on wireless, optical and wireline links, disclose methods and circuits for a programmable synthesis of a waveform from a referencing clock with phase resolution matching a single gate delay.

Abstract: This application presents an adaptive data recovery from distorted signals (ADRDS) of original data symbols from intervals or parameters of tone signals derived from a received OFDM signal, including responding to dynamic distortions introduced to the received OFDM signal by an OFDM transmission channel. Such ADRDS 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.

Abstract: The Direct Synchronization of Synthesized Clock (DSSC) contributes a method, system and apparatus for reliable and inexpensive synthesis of inherently stable local clock synchronized to a referencing signal received from an external source. Such local clock can be synchronized to a referencing frame or a data signal received from wireless or wired communication link and can be utilized for synchronizing local data transmitter or data receiver. Such DSSC can be particularly useful in OFDM systems such as LTE/WiMAX/WiFI or Powerline/ADSL/VDSL, since it can secure lower power consumption, better noise immunity and much more reliable and faster receiver tuning than those enabled by conventional solutions.

Abstract: This application presents a direct data recovery from subspaces or parameters subranges of a received OFDM signal preidentified as corresponding to specific data symbols, by applying adaptive inverse signal transformation (AIST) method for reversing both original data coding and deterministic and random distortions introduced by a transmission channel, wherein both reversals are achieved by the same conversion of the subspaces or parameter subranges into data transmitted originally in order to eliminate an intermediate recovery of signals or parameters transmitted originally within the received OFDM signal. The AIST includes using both amplitudes and gradients of amplitudes of OFDM tone signals.