FIR Column

Block: FIR Column (fir_col)
Block Author: Aaron Parsons
Document Author: Ben Blackman

Contents

Summary
Mask Parameters
Ports
Description
- Usage

Summary

Takes in real and imaginary numbers to be multiplied by the coefficients and then the filter sums the real and imaginary parts separately. Then both sums are output as well as a delayed version of the unchanged inputs.

Mask Parameters

Parameter	Variable	Description
Inputs	n_inputs	The number of real inputs and the number of imaginary inputs.
Coefficients	coeff	A vector of coefficients of this FIR. Should be the same number of coefficients as inputs.
Add Latency	add_latency	The latency of the internal adders.
Mult Latency	mult_latency	The latency of the internal multipliers.

Ports

Port	Dir	Data Type	Description
realX	IN	Inherited	This is real input X. Its data type is inherited from the previous block.
imagX	IN	Inherited	This is imaginary input X. Its data type is inherited from the previous block.
real_outX	OUT	Inherited	This output is `realX` delayed by 1 cycle.
imag_outX	OUT	Inherited	This output is `imagX` delayed by 1 cycle.
real_sum	OUT	Inherited	This is the sum of all the `realX` * coefficient X.
imag_sum	OUT	Inherited	This is the sum of all the `imagX` * coefficient X.

Description

Usage

This block takes in a number of inputs in parallel and outputs a delayed version of them and also multiplies the inputs by the coefficients. Then real_sum and imag_sum are computed and are delayed due to the latency in the adders which depends both on the add_latency and the number of inputs.