# US 10,873,517 B2 · Jitter decomposition method and measurement instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,517 B2 - Document ID: US10873517B2 - Status: Granted - Kind: B2 - Application number: 16/750,972 - Filed: 2020-01-23 - Published: 2020-07-23 - Granted: 2020-12-22 - Earliest claimed: 2019-01-23 - Assignees: Rohde & Schwarz GmbH & Co. KG - Applicants: Rohde & Schwarz GmbH & Co. KG - Inventors: Bernhard Nitsch; Adrian Ispas - Web page: https://patentgrep.com/patent/US10873517B2 ## CPC - H04L 43/087: Jitter - H04L 1/203: {Details of error rate determination, e.g. BER, FER or WER} - H04L 1/205: {jitter monitoring} - H04L 41/142: using statistical or mathematical methods - H04L 41/145: {involving simulating, designing, planning or modelling of a network} - H04L 43/045: for graphical visualisation of monitoring data - H04B 10/116: Visible light communication - H04L 43/0823: Errors, e.g. transmission errors - H04L 43/50: Testing arrangements - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract A jitter decomposition method for decomposing several jitter and noise components contained in an input signal, wherein the input signal is generated by a signal source, is disclosed. The jitter decomposition method comprises: receiving the input signal; at least one of determining and receiving a reconstructed data dependent jitter signal; at least one of determining and receiving an impulse response, the impulse response being associated with at least the signal source; and determining at least a first statistical parameter being associated with a first jitter component or a first noise component in the input signal and a second statistical parameter being associated with a second jitter component or a second noise component in the input signal, the second jitter component or the second noise component being different from the first jitter component or the first noise component, respectively. The first statistical parameter and the second statistical parameter are determined by applying a statistical method at two different times, wherein the first statistical parameter and the second statistical parameter are each determined based on at least one of the reconstructed data dependent jitter signal and the impulse response. Moreover, a measurement instrument is disclosed. ## Claims ### Claim 1 A jitter decomposition method for decomposing several jitter and noise components contained in an input signal, wherein the input signal is generated by a signal source, comprising: receiving said input signal; at least one of determining and receiving a reconstructed data dependent jitter signal; at least one of determining and receiving an impulse response, the impulse response being associated with at least said signal source; and determining at least a first statistical parameter being associated with a first jitter component or a first noise component in said input signal and a second statistical parameter being associated with a second jitter component or a second noise component in said input signal, the second jitter component or the second noise component being different from the first jitter component or the first noise component, respectively, wherein the first statistical parameter and the second statistical parameter are determined by applying a statistical method at least at two different times, and wherein the first statistical parameter and the second statistical parameter are each determined based on at least one of the reconstructed data dependent jitter signal and the impulse response. ### Claim 2 (depends on 1) The jitter decomposition method of claim 1, wherein the first statistical parameter is associated with a vertical jitter component and the second statistical parameter is associated with a horizontal jitter component, wherein the vertical jitter component is caused by an amplitude perturbation, and wherein the horizontal jitter component is caused by a temporal perturbation. ### Claim 3 (depends on 1) The jitter decomposition method of claim 1, wherein the first statistical parameter is associated with a noise component and the second statistical parameter is associated with a jitter component. ### Claim 4 (depends on 1) The jitter decomposition method of claim 1, wherein at least one jitter component in said input signal is neglected or set to zero, or wherein at least one noise component in said input signal is neglected or set to zero. ### Claim 5 (depends on 1) The jitter decomposition method of claim 1, wherein a vertical periodic noise signal in said input signal is neglected. ### Claim 6 (depends on 1) The jitter decomposition method of claim 1, wherein the first statistical parameter and the second statistical parameter comprise a statistical moment of second order or higher. ### Claim 7 (depends on 1) The jitter decomposition method of claim 1, wherein said input signal is decoded, thereby generating a decoded input signal. ### Claim 8 (depends on 1) The jitter decomposition method of claim 1, wherein the second statistical parameter is determined based on at least the first statistical parameter. ### Claim 9 (depends on 1) The jitter decomposition method of claim 1, wherein a third statistical parameter associated with a third jitter component or a third noise component in said input signal is determined, the third jitter component or the third noise component being different from the first jitter component or the first noise component as well as the second jitter component or the second noise component. ### Claim 10 (depends on 1) The jitter decomposition method of claim 1, wherein a reconstructed vertical periodic noise signal is at least one of determined and received, wherein the vertical periodic noise signal is associated with periodic noise that is caused by an amplitude perturbation. ### Claim 11 (depends on 1) The jitter decomposition method of claim 1, wherein a horizontal periodic jitter signal is determined based on at least one of the input signal, the reconstructed data dependent jitter signal and a reconstructed vertical periodic noise signal, wherein the horizontal periodic jitter signal is associated with periodic jitter that is caused by a temporal perturbation. ### Claim 12 (depends on 1) The jitter decomposition method of claim 1, wherein a random perturbation signal is determined based on at least one of the input signal, the reconstructed data dependent jitter signal, a reconstructed vertical periodic noise signal and a determined horizontal periodic jitter signal. ### Claim 13 (depends on 12) The jitter decomposition method of claim 12, wherein the second statistical parameter corresponds to a statistical parameter assigned to at least one of the horizontal random jitter and the vertical random jitter, wherein the second statistical parameter is determined based on the random perturbation signal, wherein the statistical parameter assigned to the horizontal random jitter is associated with random jitter that is caused by a temporal perturbation, and wherein the statistical parameter assigned to the vertical random jitter is associated with random jitter that is caused by an amplitude perturbation. ### Claim 14 (depends on 12) The jitter decomposition method of claim 12, wherein the first statistical parameter corresponds to a statistical parameter assigned to the vertical random noise, wherein the first statistical parameter is determined based on the random perturbation signal, the first statistical parameter being associated with a vertical random noise component of said input signal, wherein the vertical periodic noise component is associated with periodic noise that is caused by a temporal perturbation. ### Claim 15 (depends on 14) The jitter decomposition method of claim 14, wherein the second statistical parameter corresponds to a statistical parameter assigned to at least one of the horizontal random jitter and the vertical random jitter, wherein the second statistical parameter is determined based on at least one of the random perturbation signal and the determined first statistical parameter, wherein the statistical parameter assigned to the horizontal random jitter is associated with random jitter that is caused by a temporal perturbation, and wherein the statistical parameter assigned to the vertical random jitter is associated with random jitter that is caused by an amplitude perturbation. ### Claim 16 (depends on 11) The jitter decomposition method of claim 11, wherein at least one of a time variant equalizer filter and a time invariant equalizer filter is applied in order to determine said horizontal periodic jitter signal. ### Claim 17 (depends on 11) The jitter decomposition method of claim 11, wherein horizontal periodic jitter signal parameters are determined in order to determine said horizontal periodic jitter signal, the horizontal periodic jitter signal parameters being associated with periodic functions. ### Claim 18 (depends on 17) The jitter decomposition method of claim 17, wherein the horizontal periodic jitter signal parameters are determined jointly. ### Claim 19 (depends on 17) The jitter decomposition method of claim 17, wherein the horizontal periodic jitter signal parameters are determined by at least one of minimizing and maximizing a cost functional. ### Claim 20 (depends on 10) The jitter decomposition method of claim 10, wherein the reconstructed data dependent jitter signal, the reconstructed vertical periodic noise signal and the determined horizontal periodic jitter signal are subtracted from the input signal in order to determine a random perturbation signal. ### Claim 21 (depends on 20) The jitter decomposition method of claim 20, wherein a statistical analysis of the random perturbation signal is performed in order to determine at least one of the first statistical parameter and the second statistical parameter. ### Claim 22 (depends on 20) The jitter decomposition method of claim 20, wherein an expected value of the random perturbation signal squared is determined in order to determine at least one of the first statistical parameter and the second statistical parameter. ### Claim 23 (depends on 1) The jitter decomposition method of claim 1, wherein said input signal is PAM-n coded, wherein n is an integer bigger than 1. ### Claim 24 A measurement instrument, comprising: at least one input channel; and an analysis circuit being connected to the at least one input channel, wherein the measurement instrument being configured to receive an input signal via said input channel and to forward the input signal to the analysis circuit, the analysis circuit being configured to at least one of determine and receive a reconstructed data dependent jitter signal; the analysis circuit being configured to at least one of determine and receive an impulse response, the impulse response being associated with at least said signal source; and the analysis circuit being configured to determine at least a first statistical parameter being associated with a first jitter component or a first noise component in said input signal and a second statistical parameter being associated with a second jitter component or a second noise component in said input signal, wherein the first statistical parameter and the second statistical parameter are determined by applying a statistical method at two different times, and wherein the first statistical parameter and the second statistical parameter are each determined based on at least one of the reconstructed data dependent jitter signal and the impulse response. ### Claim 25 (depends on 24) The measurement instrument of claim 24, wherein the first statistical parameter is associated with a vertical jitter component and the second statistical parameter is associated with a horizontal jitter component, wherein the vertical jitter component is caused by an amplitude perturbation, and wherein the horizontal jitter component is caused by a temporal perturbation. ### Claim 26 (depends on 24) The measurement instrument of claim 24, wherein the first statistical parameter is associated with a noise component and the second statistical parameter is associated with a jitter component. ### Claim 27 (depends on 24) The measurement instrument of claim 24, wherein the analysis circuit is configured to neglect or set to zero at least one of a jitter component in said input signal, noise component in said input signal and a vertical periodic noise signal in said input signal. ### Claim 28 (depends on 24) The measurement instrument of claim 24, wherein the first statistical parameter and the second statistical parameter comprise a statistical moment of second order or higher. ### Claim 29 (depends on 24) The measurement instrument of claim 24, wherein the analysis circuit is configured to decode said input signal, thereby generating a decoded input signal.