Vendor: Commsonic Ltd Category: Modulation Demodulation

Single-channel Cable Modulator

The CMS0021 Single-channel Cable Modulator encodes a transport stream for J83 or DVB-C.

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Overview

The CMS0021 Single-channel Cable Modulator encodes a transport stream for J83 or DVB-C. The resulting QAM-symbols are filtered and up-converted for output to the radio interface as a single I/Q sample stream for translation to the final RF frequency.

Although most designs will implement only one of the cable standards, it is possible to synthesise the core to support any combination of standards in a single device.

Multiple instances of CMS0021 may be used on an FPGA, sharing access to a single external RAM device. This would typically take the form of a fast SRAM (or possibly SDRAM through a suitable SDRAM controller).

Multi-core implementations typically employ separate DACs for each core with the resulting modulated baseband or IF carriers up-converted to the assigned RF frequency bands and combined to produce the wideband cable transmission signal.

Key features

  •  
  • Compliant with DVB-C (EN 300 429); ITU J.83 Annexes A, B and C; DOCSIS 1.x, 2.0 and 3.0.
  • Scalable architecture supports multiple instances per FPGA.
  • Modulation accuracy > 45dB (MER).
  • On-chip or off-chip interleaving RAM.
  • Variable symbol-rate interpolation.
  • Software selectable channel filter.
  • AD9857/AD9957/AD9789 interface and auto programming support.
  • AD9516/ADF4350 PLL programming support.
  • Extension core available for SPI/ASI interface with integrated PCR TS re-stamping, NULL TS packet removal/filtering and NULL/PRBS TS packet insertion.
  • Seamless integration with Altera ASI megacore when using SPI/ASI extension core.
  • Optional input and output TS rate estimation registers.
  • Optional noise interference source
  • Modes that are not required may be removed with synthesis options to generate a compact, efficient design.
  • Designed for very efficient FPGA implementation without compromise to the targeting of gate array or standard cell structures such as Altera HardCopy.
  • Supplied as a protected bitstream or netlist (Megacore for Altera FPGA targets).

Block Diagram

CMS0021 block diagram

What’s Included?

  • Optimised for Xilinx and Altera.
  • Evaluation boards available

Specifications

Identity

Part Number
CMS0021
Vendor
Commsonic Ltd
Type
Silicon IP

Files

Product Sheet Download

Note: some files may require an NDA depending on provider policy.

Provider

Commsonic Ltd
HQ: UK
Commsonic is a design services company specialising in the development of ASIC, FPGA, DSP and board-level sub-systems for applications in wireless and wireline communications.

Our expertise is primarily in the gate- and power-efficient implementation of physical-layer (PHY) functions such as: modulation, demodulation, equalisation and channel coding but our experience encompasses all of the major elements of a modern baseband 'core' including the medium access control (MAC), voiceband DSP, mixed-signal interfaces, and embedded Cpu and software.

Our services are provided on a turnkey basis or as part of a support package attached to our licenced IP or tool products.

Commsonic's customers are typically semiconductor vendors and manufacturers of communications equipment that require leading-edge, Standards-based or proprietary PHY solutions but lack the internal resources or skills necessary to deliver projects against aggressive deadlines.

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Frequently asked questions about Modulation and Demodulation IP cores

What is Single-channel Cable Modulator?

Single-channel Cable Modulator is a Modulation Demodulation IP core from Commsonic Ltd listed on Semi IP Hub.

How should engineers evaluate this Modulation Demodulation?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Modulation Demodulation IP.

Can this semiconductor IP be compared with similar products?

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