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Table 1 Actors in the dataflow graph of Fig. 2

From: Optimized implementation of digital signal processing applications with gapless data acquisition

Actor

Description

DAS

Data acquisition source. Interface for acquiring data from the TDD.

DAT

Data acquisition transformation. Sends packed pairs of samples to the GPU and unpacks the samples on the GPU.

DVL

Determine voltage level. Sorts the input data in the current window and determines high and low voltage thresholds.

STR

State representation. Converts samples that encapsulate voltage values into digital form (high/low voltage states).

FSM

Finite state machine. Determines voltage transitions from high to low voltage states or low to high voltage states.

TRT

Compute transition time. Computes the transition time for each voltage transition in the current window.

RE

Rough estimation. Derives a preliminary estimation of the clock period.

RRE

Refine rough estimation. Refines the rough estimation of the clock period to improve its accuracy.

LFT

Linear fitting. Further refines the estimated clock period with linear fitting. Computes time interval errors (TIEs) using the refined clock period estimate.

TSD

Compute TIE standard deviation. Computes the standard deviation of the TIEs for the current window.

GCC

GPU to CPU data transfer. Transfers clock period result from GPU memory to CPU memory.

GCT

GPU to CPU data transfer. Transfers TIE standard deviation from GPU memory to CPU memory.

SKC

Corrected refined estimation sink actor. Produces the result of the corrected refined estimation for the recovered clock period.

SKT

Standard deviation of TIE sink actor. Produces the standard deviation of the TIEs.