Table 1 - Listing Each Claim Element Annotated With Its Claim Number and a
`Reference Letter:
`Claim
`
`IPR2015-01392
`
`Code
`
`’923 Patent Claim Elements
`
`1
`
`A method for processing digital input data representing signals
`
`1-16
`
`containing a source signal from a signal source on-axis from an array
`
`of sensors as well as interference signals from interference sources
`
`located off-axis from the signal source and for producing digital
`
`output data representing the source signal with reduced interference
`
`signals relative to the source signal, comprising the steps of: [Ex.
`
`1001, 11:21-27]
`
`1a
`
`generating a main channel from the digital input data, the main
`
`channel representing signals received in the direction of the signal
`
`source and having a source signal component and an interference
`
`signal component; [11:28-31]
`
`1b
`
`generating at least one reference channel from the digital input data,
`
`each reference channel representing signals received in directions
`
`other than that of the signal source; [11:32-35]
`
`1c
`
`adaptively filtering said at least one reference channel using filter
`
`weight values to generate a cancelling signal approximating the
`
`
`
`RTL923_1017-0001
`
`
`Reference Letter:
`Claim
`
`IPR2015-01392
`
`Code
`
`’923 Patent Claim Elements
`
`1
`
`A method for processing digital input data representing signals
`
`1-16
`
`containing a source signal from a signal source on-axis from an array
`
`of sensors as well as interference signals from interference sources
`
`located off-axis from the signal source and for producing digital
`
`output data representing the source signal with reduced interference
`
`signals relative to the source signal, comprising the steps of: [Ex.
`
`1001, 11:21-27]
`
`1a
`
`generating a main channel from the digital input data, the main
`
`channel representing signals received in the direction of the signal
`
`source and having a source signal component and an interference
`
`signal component; [11:28-31]
`
`1b
`
`generating at least one reference channel from the digital input data,
`
`each reference channel representing signals received in directions
`
`other than that of the signal source; [11:32-35]
`
`1c
`
`adaptively filtering said at least one reference channel using filter
`
`weight values to generate a cancelling signal approximating the
`
`
`
`RTL923_1017-0001
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`1d
`
`1e
`
`1f
`
`2
`
`3
`
`4
`
`interference signal component in the main channel; [11:36-39]
`
`generating the digital output data by subtracting the cancelling signal
`
`from the main channel; [11:40-41]
`
`deriving new filter weight values so that the difference between the
`
`main channel and the cancelling signal is minimized; [11:42-44]
`
`truncating the new filter weight values to predetermined threshold
`
`values when each of the new filter weight values exceeds the
`
`corresponding threshold value; [11:45-47]
`
`The method of claim 1, further comprising the step of filtering said at
`
`least one reference channel so that it has a substantially flat
`
`frequency spectrum; [11:48-50]
`
`The method of claim 1, further comprising the step of inhibiting the
`
`generation of the cancelling signal when a normalized power
`
`difference between the main channel and said at least one reference
`
`channel is positive; [11:51-54]
`
`A method for processing digital input data representing signals
`
`containing a source signal from a signal source on-axis from an array
`
`
`
`RTL923_1017-0002
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`of sensors as well as interference signals from interference sources
`
`located off-axis from the signal source and for producing digital
`
`output data representing the source signal with reduced interference
`
`signals relative to the source signal, comprising the steps of: [11:55-
`
`61]
`
`4a
`
`generating a main channel from the digital input data, the main
`
`channel representing signals received in the direction of the signal
`
`source and having a source signal component and an interference
`
`signal component; [11:62-65]
`
`4b
`
`generating at least one reference channel from the digital input data,
`
`each reference channel representing signals received in directions
`
`other than that of the signal source; [11:66-69]
`
`4c
`
`filtering said at least one reference channel using filter weight values
`
`to generate a cancelling signal approximating the interference signal
`
`component in the main channel; [12:1-4]
`
`4d
`
`generating the digital output data by subtracting the cancelling signal
`
`from the main channel; [12:5-6]
`
`
`
`RTL923_1017-0003
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`4e
`
`4f
`
`5
`
`5a
`
`5b
`
`5c
`
`deriving new filter weight values so that the difference between the
`
`main channel and the cancelling signal is minimized; [12:7-9]
`
`constraining the new filter weight values by converting the new filter
`
`weight values to frequency representation values, truncating the
`
`frequency representation values to predetermined threshold values,
`
`and converting them back to filter weight values; [12:10-14]
`
`The method of claim 4 wherein constraining the new filter weight
`
`values comprises: [12:15-16]
`
`generating frequency representation values of the new filter weight
`
`values; [12:17-18]
`
`divide the frequency representation values into a plurality of
`
`frequency bins; [12:19-20]
`
`truncating the frequency representation values in each frequency bin
`
`if they exceed a predetermined threshold value associated with each
`
`frequency bin; [12:21-23]
`
`5d
`
`converting the frequency representation values back to filter weight
`
`values. [12:24-25]
`
`
`
`RTL923_1017-0004
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`6
`
`7
`
`8
`
`9
`
`The method of claim 5 wherein generating the frequency
`
`representation is done by using the Fast Fourier Transform, and
`
`converting back is done by using the Inverse Fast Fourier Transform;
`
`[12:26-29]
`
`The method of claim 4, further comprising the step of filtering said at
`
`least one reference channel so that it has a substantially flat
`
`frequency spectrum; [12:30-32]
`
`The method of claim 4, further comprising the step of inhibiting the
`
`generation of the cancelling signal when a normalized power
`
`difference between the main channel and said at least one reference
`
`channel is positive; [12:33-36]
`
`A method for receiving a source signal from a signal source as well
`
`as interference signals from interference sources and for producing
`
`an output signal with reduced interference signals relative to the
`
`source signal, comprising the steps of: [12:37-41]
`
`9a
`
`receiving analog signals from a sensor array of spatially distributed
`
`sensors; [12:42-43]
`
`
`
`RTL923_1017-0005
`
`
`
`Claim
`
`Code
`
`9b
`
`9c
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`sampling the analog signals to convert them to digital form; [12:44-
`
`45]
`
`generating a main channel representing signals received in the
`
`direction of the signal source, the main channel having a source
`
`signal component and an interference signal component; [12:46-49]
`
`9d
`
`generating at least one reference channel, each reference channel
`
`representing signals received in directions other than that of the
`
`signal source; [12:50-52]
`
`9e
`
`filtering said at least one reference channel using filter weight values
`
`to generate a cancelling signal approximating the interference signal
`
`component in the main channel; [12:53-56]
`
`generating a digital output signal by subtracting the cancelling signal
`
`from the main channel; [12:57-58]
`
`converting the digital output signal to analog form; [12:59]
`
`deriving new filter weight values so that the difference between the
`
`main channel and the cancelling signal is minimized; [12:60-62]
`
`truncating the new filter weight values to predetermined threshold
`
`9f
`
`9g
`
`9h
`
`9i
`
`
`
`RTL923_1017-0006
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`values when each of the new filter weight values exceeds the
`
`corresponding threshold value; [12:63-65]
`
`10
`
`The method of claim 9, further comprising the step of filtering said at
`
`least one reference channel so that it has a substantially flat
`
`frequency spectrum; [13:1-3]
`
`11
`
`The method of claim 9, further comprising the step of inhibiting the
`
`generation of the cancelling signal when a normalized power
`
`difference between the main channel and said at least one reference
`
`channel is positive; [13:4-7]
`
`12
`
`A method for receiving a source signal from a signal source as well
`
`as interference signals from interference sources and for producing
`
`an output signal with reduced interference signals relative to the
`
`source signal, comprising the steps of: [13:8-12]
`
`12a
`
`receiving analog signals from a sensor array of spatially distributed
`
`sensors; [13:13-14]
`
`12b
`
`sampling the analog signals to convert them to digital form; [13:15-
`
`16]
`
`
`
`RTL923_1017-0007
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`12c
`
`generating a main channel representing signals received in the
`
`direction of the signal source, the main channel having a source
`
`signal component and an interference signal component; [13:17-20]
`
`12d
`
`generating at least one reference channel, each reference channel
`
`representing signals received in directions other than that of the
`
`signal source; [13:21-23]
`
`12e
`
`filtering said at least one reference channel using filter weight values
`
`to generate a cancelling signal approximating the interference signal
`
`component in the main channel; [13:24-27]
`
`12f
`
`generating a digital output signal by subtracting the cancelling signal
`
`from the main channel; [13:28-29]
`
`12g
`
`12h
`
`converting the digital output signal to analog form; [13:30]
`
`deriving new filter weight values so that the difference between the
`
`main channel and the cancelling signal is minimized; [14:1-3]
`
`12i
`
`constraining the new filter weight values by converting the new filter
`
`weight values to frequency representation values, truncating the
`
`frequency representation values to predetermined threshold values,
`
`
`
`RTL923_1017-0008
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`and converting them back to filter weight values; [14:4-8]
`
`13
`
`The method of claim 12 wherein constraining the new filter weight
`
`values comprises: [14:9-10]
`
`13a
`
`generating frequency representation values of the new filter weight
`
`values; [14:11-12]
`
`13b
`
`divide the frequency representation values into a plurality of
`
`frequency bins; [14:13-14]
`
`13c
`
`truncating the frequency representation values in each frequency bin
`
`if they exceed a predetermined threshold value associated with each
`
`frequency bin; [14:15-17]
`
`13d
`
`converting the frequency representation values back to filter weight
`
`values; [14:18-19]
`
`14
`
`The method of claim 13 wherein generating frequency representation
`
`values is done by using the Fast Fourier Transform, and converting
`
`them back to filter weight values is done by using the Inverse Fast
`
`Fourier Transform; [14:20-23]
`
`15
`
`The method of claim 12, further comprising the step of filtering said
`
`
`
`RTL923_1017-0009
`
`
`
`Claim
`
`Code
`
`IPR2015-01392
`
`’923 Patent Claim Elements
`
`1-16
`
`least one reference channel so that it has a substantially flat
`
`frequency spectrum; [14:24-26]
`
`16
`
`The method of claim 12, further comprising the step of inhibiting the
`
`generation of the cancelling signal when a normalized power
`
`difference between the main channel and said at least one reference
`
`channel is positive; [14:27-30]
`
`
`
`
`
`RTL923_1017-0010
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