NCO IP Core: User Guide

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ID 683406
Date 11/06/2017
Public
Document Table of Contents
Document Table of Contents x
1. About the NCO IP Core 2. NCO IP Core Getting Started 3. NCO IP Core Functional Description A. NCO IP Core User Guide Document Archives 4. Document Revision History
1. About the NCO IP Core x
1.1. Intel® DSP IP Core Features 1.2. NCO IP Core Features 1.3. DSP IP Core Device Family Support 1.4. NCO IP Core MegaCore Verification 1.5. NCO IP Core Release Information 1.6. NCO IP Core Performance and Resource Utilization
2. NCO IP Core Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 2.2. IP Catalog and Parameter Editor 2.3. Generating IP Cores ( Intel® Quartus® Prime Pro Edition) 2.4. Simulating Intel® FPGA IP Cores
2.1. Installing and Licensing Intel® FPGA IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode 2.1.2. NCO IP Core Intel® FPGA IP Evaluation Mode Timeout Behavior
2.3. Generating IP Cores ( Intel® Quartus® Prime Pro Edition) x
2.3.1. IP Core Generation Output ( Intel® Quartus® Prime Pro Edition)
3. NCO IP Core Functional Description x
3.1. NCO IP Core Architectures 3.2. Multichannel NCOs 3.3. Frequency Hopping 3.4. Phase Dithering 3.5. Frequency Modulation 3.6. Phase Modulation 3.7. NCO IP Core Parameters 3.8. NCO IP Core Interfaces and Signals
3.1. NCO IP Core Architectures x
3.1.1. Large ROM Architecture 3.1.2. Small ROM Architecture 3.1.3. CORDIC Architecture 3.1.4. Multiplier-Based Architecture
3.7. NCO IP Core Parameters x
3.7.1. Architecture Parameters 3.7.2. Frequency Parameters 3.7.3. Optional Ports Parameters
3.8. NCO IP Core Interfaces and Signals x
3.8.1. Avalon-ST Interfaces in DSP IP Cores 3.8.2. NCO IP Core Signals 3.8.3. NCO IP Core Timing Diagrams
1. About the NCO IP Core
2. NCO IP Core Getting Started
3. NCO IP Core Functional Description
A. NCO IP Core User Guide Document Archives
4. Document Revision History

1. About the NCO IP Core

Updated for:
Intel® Quartus® Prime Design Suite 17.1
The Altera® NCO IP core generates numerically controlled oscillators (NCOs) customized for Intel devices. A numerically controlled oscillator (NCO) synthesizes a discrete-time, discrete-valued representation of a sinusoidal waveform.

Typically, you can use NCOs in communication systems as quadrature carrier generators in I-Q mixers, in which baseband data is modulated onto the orthogonal carriers in one of a variety of ways.

Figure 1. Simple Modulator

You can also use NCOs in all-digital phase-locked-loops (PLLs) for carrier synchronization in communications receivers, or as standalone frequency shift keying (FSK) or phase shift keying (PSK) modulators. In these applications, the phase or the frequency of the output waveform varies directly according to an input data stream.

You can implement ROM-based, CORDIC-based, and multiplier-based NCO architectures,. The wizard also includes time and frequency domain graphs that dynamically display the functionality of the NCO, based on your parameter settings.

To decide which NCO implementation to use, consider the spectral purity, frequency resolution, performance, throughput, and required device resources. Also, consider the trade-offs between some or all of these parameters.

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