E4729A SystemVue Consulting Services: DOCSIS 3.1 Baseband Verification Library

Keysight E4729A

SystemVue Consulting Services

DOCSIS 3.1 Baseband Verification Library

SystemVue Algorithm Reference Library for Data-Over-Cable Service Interface Specifications (DOCSIS 3.1), Intended for System Architecture, Baseband Algorithms and RF Component Verification

Technical Overview

Introduction

DOCSIS 3.1 provides a way for cable operators to increase capacity and speed, with up to 50 percent more data throughput over the same spectrum than DOCSIS 3.0, and the ability to deliver 2.5 Gbps in the upstream and 10 Gbps in the downstream on an existing hybrid fiber-coaxial (HFC) network. DOCSIS 3.1 achieves its capacity increase – as much as 50 percent in the upstream and downstream signal directions—through the use of orthogonal frequency-division multiplexing (OFDM) and low-density parity-check (LDPC) forward error correction (FEC) technology. The standard mandates the use of up to 4096 QAM modulation with a 24- to 192 MHz channel bandwidth in the downstream, and up to 4096 QAM modulation with up to a 96 MHz bandwidth in the upstream. It also supports pure Intellectual Property (IP) payload data, can co-exist with legacy channels on the existing HFC infrastructure and is backward-compatible with the large installed base of earlier DOCSIS gear.

The Keysight Technologies, Inc. DOCSIS 3.1 Baseband Verification Library is an optional add-on library for SystemVue, providing reference designs for DOCSIS 3.1 fully coded sources and receivers for both Downstream and Upstream. It enables end-to-end simulation modeling for DOCSIS 3.1 systems.

Who should use the DOCSIS library?

System-level architects, baseband algorithm designers and RF component designers can use the DOCSIS 3.1 library to perform early system validation, with or without working baseband or RF hardware. SystemVue is also scriptable, linkable to other platforms and connects to high-performance test equipment, providing both flexibility and consistency across the full product lifecycle.

The DOCSIS 3.1 library is intended for use in early research and development, and in academic research systems to enable the exploration of algorithm and system robustness in deep margin and interference situations.

What can you do with the SystemVue DOCSIS 3.1 library?

With the SystemVue DOCSIS 3.1 library, users can simulate DOCSIS 3.1 system performance (including baseband Transmitter (Tx)/Receiver (Rx) algorithms and RF impairments); with or without DOCSIS 3.0 SC-QAM system interference.

• Baseband modeling: Replace algorithms in the DOCSIS 3.1 reference design with your own custom algorithms in C++, MATLAB, or HDL model formats, or use graphically-defined schematics. SystemVue also conveniently integrates with MATLAB for IP compatibility and portability.
• System modeling: Evaluate algorithms under user-defined fading, noise and interference (e.g., analog TV, DOCSIS 3.0 SC-QAM and LTE). RF impairments can also be included.
• Research and emerging standards: Investigate advanced channel coding techniques such as LDPC and OFDM in video systems. Provide a platform to investigate DOCSIS 3.1 system performance with, for example, different windowing functions, time interleaving depths and the number of continuous pilots.
• RF component evaluation: Fill gaps for RFIC/RF module designers who want to assess system-level performance based on simulated or tested analog designs. SystemVue can interact with the Keysight ADS and GoldenGate RF EDA simulators, with X-parameters 1 , and more.