Recommended Block Parameter Settings for Frame-Based Processing and Multi-Channel Processing

Guideline ID

2.12.1

Severity

Informative

Description

In Simulink^®, use vector input signals to a block to perform either a multi-channel processing or frame-based processing. You can configure your model to use both multi-channel processing, which processes multiple signal streams in parallel, and frame-based processing, which processes series of timeseries data in parallel at high sample rates. This configuration is typically necessary for handling data sourced from high-speed Analog-to-Digital Converters (ADCs) that follow standards like JESD204.

How you configure blocks for frame-based processing and multi-channel processing in Simulink depends on whether the blocks contain state quantities. For blocks without state quantities, such as Gain block, you set up both frame-based processing and multi-channel processing identically. Blocks that maintain state quantities, such as Discrete FIR Filter block and LMS Filter block, require distinct configurations for frame-based processing and multi-channel processing.

Simulink provides frame-based processing and multi-channel processing blocks in the DSP HDL Toolbox™, Wireless HDL Toolbox™, and Vision HDL Toolbox™ block libraries. The figure shows the frame-based processing and multi-channel processing.

Organize the input signals into an n-by-m matrix when performing both frame processing and multi-channel processing. Where n is the number of rows corresponding to frames, and m is the number of columns corresponding to channels.

This table summarizes the parameter settings that correspond to frame processing and multi-channel processing.

Processing Type	Simulink Blocks with Input Processing Parameter	Simulink Blocks Without Input Processing Parameter
Frame Processing	Set the Input processing block parameter to Columns as channels (frame based). Specify the input signal as a 1-D vector or column vector.	Specify the input signal as a 1-D vector, row vector, or column vector.
Multi-channel Processing	Set the Input processing block parameter to Elements as channels (sample based). Specify the input signal as a 1-D vector, row vector, or column vector.	Specify the input signal as a 1-D vector, row vector, or column vector.
Frame and Multi-channel Processing	Set the Input processing block parameter to Columns as channels (frame based). Specify the input signal as n-by-m matrix.	Specify the input signal as n-by-m matrix.