Sample Rate Offset

Apply sample rate offset to input signal

Since R2022b

Libraries:
Communications Toolbox / RF Impairments and Components

Description

The Sample Rate Offset block applies a sample rate offset to the input signal. Applying a sample rate offset is equivalent to changing the ADC clock rate.

Examples

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Apply Sample Rate Offset to 16-QAM Signal

This example uses:

Open Script

Apply a sample rate offset to a 16-QAM modulated signal and compare the reference constellation with the signal with a sample rate offset.

Open the doc_apply_sample_rate_offset model. The model generates random data using the Random Integer Generator block. To modulate the random data, the model uses the Rectangular QAM Modulator Baseband block with a modulation order of 16 and a constellation order set to Gray. Subsequently, the Sample Rate Offset block applies a sample rate offset of 50 parts per million to the modulated signal. The model displays the resulting constellation through the Constellation Diagram block.

Run the model. The constellation diagram shows the reference constellation and the signal that has a sample rate offset.

Ports

Input

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In — Input signal
scalar | vector | matrix

Input signal, specified as a scalar, an N_S element column vector, or an N_S-by-N_C matrix. N_S is the number of time samples. N_C is the number of channels. For matrix input signals, the sample rate offset is applied independently to each column.

Data Types: double | single
Complex Number Support: Yes

Output

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Out — Output signal
scalar | vector | matrix

Output signal, returned as a scalar, vector, or matrix. This output is the same data type as the input signal.

Parameters

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To edit block parameters interactively, use the Property Inspector. From the Simulink^® Toolstrip, on the Simulation tab, in the Prepare gallery, select Property Inspector.