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Published byPreston Foster Modified over 9 years ago
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Channel Spectral Characteristics
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Some Polyphase Filter Options
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FDM-to TDM Standard Channelizer: Collection of Downconverters
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FDM-to TDM Polyphase Channelizer: Input Commutator, M-Path Filter, and FFT
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Conventional Channelizer Application Channelize and Downsample to Nyquist Rate, Interpolate to Two Times Symbol Rate
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Enhanced Channelizer Solution Replace Interpolator Function With Buffer Addressing
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Standard Downconverter: Heterodyne, Filter, Resample
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Equivalency Theorem Heterodyne and Low Pass Filter Same as Band Pass Filter and Heterodyne
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Slide Heterodyne Through Filter: Convert Low-Pass to Band-Pass
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Slide Heterodyne Through Downsampler: Alias Frequency of Heterodyne
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Select Input Center Frequency That Aliases to DC Under Resampling
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Discard Trivial Heterodyne: Now a Scalar Multiply by Unity
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Noble Identity Interchange Order of Filter and Resample
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M-Path Partition of FIR Filter
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Example of Polyphase (M-Path) Partition
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Block Diagram of M-Path Filter
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Pull Resamplers Through Filters in Each path
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Delays and Synchronous Rersamplers are Equivalent to Input Commutator
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Input Series in Each Path of M-Path Filter have Offset Time Origins
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Path Filters are Interpolators: Computing Output Samples with Common Time Origin
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Phase Response of Paths in Ten Stage Polyphase Filter
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Group Delay of Paths in Ten-Stage Polyphase Filter
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Modulation Property for Z-Transform
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Polyphase Partition of Band-Pass Filter
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Spectral Response of Signal in Resampled Pass Band Filter
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Performance Specifications for 50-Channel Polyphase Channelizer
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Required Spectral Response of Channel Filter at Output and at Input Rates
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Time and Frequency Response of Remez Filter Design
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Time and Frequency response of Remez Filter Design with Modified End Points
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Time and Frequency Response of Prototype Filter at Output Sample Rate
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Commutators for Standard Input Buffer and for Circular Input Buffer
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Standard Polyphase Channelizer and Modified Channelizer with Circular Buffers
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Content of 64-Point Circular Input Buffer for Two Successive 48 Point Input Blocks
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Shifting Time Origin for Input Data of Polyphase Filter and of Resetting FFT
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Contents of Transfer Circular Buffer Aligning Origins for Successive Input Blocks
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Input Time and Spectrum to 30 Channel, 40 Point FFT Channelizer
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Time Series from 30 Channel Channelizer
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Spectra for 30 Channel Channelizer
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Input Time and Spectrum to 50 Channel, 64 Point FFT Channelizer
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Time Series from 50 Channel Matched Filter Channelizer
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Spectra from 50 Channel Matched Filter Channelizer
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