Keysight E4729ASystemVue Consulting ServicesDVB-S2X Baseband Verification LibrarySimulation Reference Library for Satellite Communication Architects, Baseband Algorithm Researchers, and Component Verifiers in R&D

Technical Overview

Introduction

The DVB-S2X Library is an add-on for the Keysight Technologies, Inc. SystemVue simulation software. It is compliant with the physical layer and framing specifications in the DVB-S2 and DVB-S2X standards for satellite-based video broadcast and internet services:

– DVB-S2: ETSI standard document EN302307-1 version 1.4.1 (2014-11) – DVB-S2X: ETSI standard document EN302307-2 version 1.1.1 (2014-10)

The library includes baseband transmit source and receiver simulation reference models, including modulation, coding, and robust synchronization, and adds support for both DVB-S2 and the newer DVB-S2X standard. The library enables EVM and Bit-Error-Rate (BER) analysis for all modulation and coding (MODCOD) formats used in DVB-S2/S2X satellite communication systems, comprising > 100 distinct combinations of modulation, coding, and framing.

Productivity and flexibility for A/D applicationsNext generation satellite communication networks are being upgraded to enable high-capacity and low-latency networks, and offer dynamic service levels for key customers. This library provides a completed PHY reference design that can be used as a baseband algorithmic reference for system designers. It can also be used to generate standard-compliant test waveforms in both simulation and test & measurement to assist with baseband and RF functional validation in R&D.

– Saves time - The DVB-S2X Library reduces project overhead and streamlines the verification effort by providing a reliable, commercial off-the-shelf (COTS) reference for common modulation formats. Don’t overinvest in implementing a personal reference in MATLAB or C++, just to make architectural decisions.

– Use with your existing IP – SystemVue enables the easy import of intellectual property in C++, MATLAB, and HDL formats, allowing the additional modeling details required by classified, secure and academic research applications to be easily accommodated.

– Consistent results across the R&D Lifecycle – SystemVue easily connects to test equipment and other RF design tools, enabling reliable, system-true performance at wide bandwidths for RF/FPGA co-design, digital pre-distortion, and test equipment interaction.

Together with EDA-friendly licensing that promotes design re-use and collaboration between teams, the DVB-S2X Library provides the productivity benefits of a supported COTS environment, while preserving the flexibility needed for custom/secure design teams.

03 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

Figure 1. The DVB-S2X Library supports all modulation and coding states (MODCODs) for both DVB-S2 and DVB-S2X formats. Framing and spread spectrum functions are also supported for many of these formats, allowing communication designers to quickly analyze BER performance of satellite and military radio links.

Who should use the SystemVue DVB-S2X Library? System-level architects, baseband algorithm designers, and RF component designers can use the SystemVue DVB-S2X Library to perform early R&D validation of communication system architectures, components and DSP algorithms. The DVB-S2X also provides a convenient modeling platform for custom applications and proprietary communication links.

The SystemVue environment can be automated with scripts, and connects to high-performance test equipment. SystemVue also provides links to RF design tools such as Keysight Advanced Design System (ADS), providing both flexibility and consistency across a full R&D workflow.

Key applications – Satellite communication, including ground-space, space-space and deep-space – Military communication and secure backhaul – Academic research – Extended test equipment support for specialized modulation formats – Component validation, using either simulation or the latest wideband test

equipment

Key benefits – Higher productivity, through a trusted IP reference on an open modeling

environment – Lower project overhead, scripting, verification, and NRE – Faster time to deployment, through superior RF-DSP co-design in SystemVue

04 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

What is included with the DVB-S2/S2X library?

DVB-S2X reference transmitterFECFRAME

– Normal – Short – Medium

VL-SNR (mobile frame) – VL-SNR set 1 – VL-SNR set 2

Insert pilot – Yes – No

Low roll-off factor for the shaping filter – 0.15 – 0.10 – 0.05

FEC coding – BCH – LDPC

Modulation – π/2-BPSK, π/2-BPSK w/ Spreading

Factor 2, QPSK, 8-PSK – 8-APSK: 2+4+2APSK – 16-APSK: 4+12APSK, 8+8APSK – 32-APSK: 4+12+16APSK, 4+12+16rbAP-

SK, 4+8+4+16APSK – 64-APSK: 16+16+16+16APSK,

8+16+20+20APSK, 4+12+20+28APSK – 128-APSK: 16+16+16+16+16+48APSK – 256-APSK:

32+32+32+32+32+32+32+32APSK, – Constellation 1 (Table 15d for 20/30) – Constellation 2 (Table 15d for 22/30)

TX waveform and data I/O – Input data from simulation or file I/O – Output complex modulated waveform to

simulation, file I/O or test equipment – Additional outputs for framing, preamble

and other functionsTX impairments

– Users can add or sweep a wide range of RF impairments and channel models outside the ideal DVB-S2X source

DVB-S2X reference receiverFrame synchronization using both correlation and differential correlation algorithmsCarrier frequency synchronization algorithms:

– Coarse: M&M, FFT, and differential correlation

– Fine: L&R, differential correlationCarrier phase synchronization and carrier phase tracking algorithms to correct for:

– Carrier frequency offset (e.g., Doppler) – IQ phase rotation – IQ imbalance – AGC re-normalization

Adaptive equalization – Linear Equalizer (LE) and Decision

Feedback Equalizer (DFE) – Training algorithms (RLS, LMS) – Tracking algorithm (Decision-Directed

(DD), Constant Modulus Algorithm (CMA) Blind equalization algorithm/DD)

– Fractional-Space Equalizer (FSE) and T-Space Equalizer (TSE)

Soft de-mapper – Log-Likelihood Ratio (LLR)

FEC decoding – BCH decoder – LDPC decoder – De-puncturer

RX waveform and data I/O – Input complex modulated waveform from

simulation, file I/O or test equipment – Output data bits, constellation

Measurements and pre-configured templates – BER/FER vs. Eb/N0 or SNR sweeps – EVM – System-level verification

05 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

Modulation and Coding (MODCOD) formats supported

DVB-S2 MODCOD formats DVB-S2 MODCOD formatsPLS code decimal value

Implementation MODCOD name

FECFRAME type PLS code decimal value

Implementation MODCOD name

FECFRAME type

1 QPSK 1/4 Normal 33 QPSK 1/4 Short2 QPSK 1/3 Normal 34 QPSK 1/3 Short3 QPSK 2/5 Normal 35 QPSK 2/5 Short4 QPSK 1/2 Normal 36 QPSK 1/2 Short5 QPSK 3/5 Normal 37 QPSK 3/5 Short6 QPSK 2/3 Normal 38 QPSK 2/3 Short7 QPSK 3/4 Normal 39 QPSK 3/4 Short8 QPSK 4/5 Normal 40 QPSK 4/5 Short9 QPSK 5/6 Normal 41 QPSK 5/6 Short10 QPSK 8/9 Normal 42 QPSK 8/9 Short11 QPSK 9/10 Normal 43 8-PSK 3/5 Short12 8-PSK 3/5 Normal 44 8-PSK 2/3 Short13 8-PSK 2/3 Normal 45 8-PSK 3/4 Short14 8-PSK 3/4 Normal 46 8-PSK 5/6 Short15 8-PSK 5/6 Normal 47 8-PSK 8/9 Short16 8-PSK 8/9 Normal 48 17 8-PSK 9/10 Normal 49 16-APSK 2/3 Short18 16-APSK 2/3 Normal 50 16-APSK 3/4 Short19 16-APSK 3/4 Normal 51 16-APSK 4/5 Short20 16-APSK 4/5 Normal 52 16-APSK 5/6 Short21 16-APSK 5/6 Normal 53 16-APSK 8/9 Short22 16-APSK 8/9 Normal 5423 16-APSK 9/10 Normal 55 32-APSK 3/4 Short24 32-APSK 3/4 Normal 56 32-APSK 4/5 Short25 32-APSK 4/5 Normal 57 32-APSK 5/6 Short26 32-APSK 5/6 Normal 58 32-APSK 8/9 Short27 32-APSK 8/9 Normal 5928 32-APSK 9/10 Normal 60

06 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

Figure 2. In this example, the DVB-S2X library is used to analyze a 256-APSK communication link having AWGN receiver noise, and 100 kHz frequency offset (representing common Doppler shifts). The received constellation is shown with both coarse and fine carrier frequency synchronization enabled, but (a) shows the effect of no phase synchronization and (b) shows the constellation after phase synchronization is enabled.

DVB-S2X MODCOD formats DVB-S2X MODCOD formats PLS code decimal value

Implementation MODCOD name

FECFRAME type

PLS code decimal value

Implementation MODCOD name

FECFRAME type

129 VL-SNR set 1 QPSK 2/9 Normal 180 4+8+4+16APSK 132/180 Normalπ/2 BPSK 1/5 Medium 182 4+8+4+16APSK 140/180 Normalπ/2 BPSK 11/45 Medium 184 16+16+16+16APSK 128/180 Normalπ/2 BPSK 1/3 Medium 186 4+12+20+28APSK 132/180 Normalπ/2 BPSK 1/5 spreading factor 2 Short 190 8+16+20+20APSK 7/9 Normalπ/2 BPSK 11/45 spreading factor 2 Short 194 8+16+20+20APSK 4/5 Normal

131 VL-SNR set 2 π/2 BPSK 1/5 Short 198 8+16+20+20APSK 5/6 Normalπ/2 BPSK 4/15 Short 200 128APSK 135/180 Normalπ/2 BPSK 1/3 Short 202 128APSK 140/180 Normal

132 QPSK 13/45 Normal 204 256APSK 116/180 Normal134 QPSK 9/20 Normal 206 256APSK 20/30 Normal136 QPSK 11/20 Normal 208 256APSK 124/180 Normal138 2+4+2APSK 100/180 Normal 210 256APSK 128/180 Normal140 2+4+2APSK 104/180 Normal 212 256APSK 22/30 Normal142 8PSK 23/36 Normal 214 256APSK 135/180 Normal144 8PSK 25/36 Normal 216 QPSK 11/45 Short146 8PSK 13/18 Normal 218 QPSK 4/15 Short148 8+8APSK 90/180 Normal 220 QPSK 14/45 Short150 8+8APSK 96/180 Normal 222 QPSK 7/15 Short152 8+8APSK 100/180 Normal 224 QPSK 8/15 Short154 4+12APSK 26/45 Normal 226 QPSK 32/45 Short156 4+12APSK 3/5 Normal 228 8PSK 7/15 Short158 8+8APSK 18/30 Normal 230 8PSK 8/15 Short160 4+12APSK 28/45 Normal 232 8PSK 26/45 Short162 4+12APSK 23/36 Normal 234 8PSK 32/45 Short164 8+8APSK 20/30 Normal 236 4+12APSK 7/15 Short166 4+12APSK 25/36 Normal 238 4+12APSK 8/15 Short168 4+12APSK 13/18 Normal 240 4+12APSK 26/45 Short170 4+12APSK 140/180 Normal 242 4+12APSK 3/5 Short172 4+12APSK 154/180 Normal 244 4+12APSK 32/45 Short174 4+12+16rbAPSK 2/3 Normal 246 4+12+16rbAPSK 2/3 Short178 4+8+4+16APSK 128/180 Normal 248 4+12+16rbAPSK 32/45 Short

07 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

Figure 3. The DVB-S2X library provides reliable signal processing references that approach the theoretical performance of each modulation format. Under non-ideal conditions, the DVB-S2X also provides a full reference receiver that corrects for carrier offset frequency (due to Doppler shift or a mistuned receiver), synchronization, IQ rotation/mismatch, and other impairments, just as a finished radio would do. These corrections also make interaction with RF test equipment easy and robust.

Configuration

The E4729A DVB-S2X Library only requires the base SystemVue 2015.01 environment (W1461BP/BT). It can be added to any W146x-series SystemVue bundle, and easily shared over a network.

The E4729 DVB-S2X library does not require the SystemVue W1914EP/ET DVB-x2 baseband verification library (which contains an older implementation of DVB-S2). This DVB-S2X library completely replaces the older DVB-S2 library, and updating several key components, particularly synchronization robustness for high Doppler shifts.

Additional Keysight software applications (such as I/O libraries, Command Expert, and the 89600 VSA software) are often used to connect SystemVue to families of Keysight test equipment. These families include baseband AWGs, digitizers, RF sources, RF analyzers, and oscilloscopes.

08 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

Figure 4. The DVB-S2X Library can be used inside the SystemVue simulation environment (shaded region), or with Keysight EDA design software, or a variety of test and measurement waveform sources and analyzers. It can be leveraged throughout the R&D workflow, and automated in scripts.

For More Information

For more detailed application information, refer to: – www.keysight.com/find/eesof-systemvue – www.keysight.com/find/eesof-systemvue-videos – www.keysight.com/find/eesof-systemvue-evaluation

09 | Keysight | E4729A SystemVue Consulting Services: DVB-S2X Baseband Verification Library - Technical Overview

This information is subject to change without notice.© Keysight Technologies, 2015Published in USA, October 21, 20155992-1172ENwww.keysight.com

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