Complex Delay

Block: Complex Delay (delay_complex)

Block Author: Aaron Parsons

Document Author: Aaron Parsons

Contents Summary Mask Parameters Ports Description

Summary

A delay block that treats its input as complex, splits it into real and imaginary components, delays each component by a specified amount, and then re-joins them into a complex output. The underlying storage is user-selectable (either BRAM or SLR16 elements). The reason for this is wide (36 bit) delays make adjacent multipliers in multiplier-bram pairs unusable.

Mask Parameters

Parameter	Variable	Description
Delay Depth	delay_depth	The length of the delay.
Bit Width	n_bits	Specifies the width of the real/imaginary components. Width of each component is assumed equal.
Use BRAM	use_bram	Set to 1 to implement the delay using BRAM. If 0, the delay will be implemented using SLR16 elements.

Ports

Port	Dir	Data Type	Description
in	in	???	The complex signal to be delayed.
out	out	???	The delayed complex signal.

Description

A delay block that treats its input as complex, splits it into real and imaginary components, delays each component by a specified amount, and then re-joins them into a complex output. The underlying storage is user-selectable (either BRAM or SLR16 elements). The reason for this is wide (36 bit) delays make adjacent multipliers in multiplier-bram pairs unusable.