Encoder/decoder core supports DVB-S2 standard

A low density parity check code forward error correction encoder/decoder core is fully compliant with the Digital Video Broadcast S2 standard.

Comtech AHA Corp has developed a low density parity check code (LDPC) forward error correction (FEC) encoder/decoder core that is fully compliant with the Digital Video Broadcast S2 standard (DVB-S2).

It is capable of up to 100Mbit/s datarate in an Altera Stratix II FPGA and supports all codes, frame sizes, and modulation schemes set forth in the DVB-S2 specification.

Included with the LDPC core is a BCH outer code module that lowers the error floor for greater system reliability.

Comtech AHA's DVB-S2 LDPC core implements an encoder with an interleaver, a decoder with a deinterleaver, and operates in either full duplex or half duplex modes.

The DVB-S2 LDPC core provides a wide range of code rates from 1/4 to 9/10 and supports the four constellations of the DVB-S2 specification ranging in spectrum efficiency from 0.49 to 5.4bit/s/Hz.

Features of the DVB-S2 LDPC core include DVB-S2 compliant BCH outer and LDPC inner codes, bypass mode, code change on the fly, burst control, and adaptive coding and modulation (ACM) and variable coding and modulation (VCM) support.

The core is targeted to an Altera Stratex II FPGA; an ASIC core is also available on request.

LDPC codes provide superior bit-error-rate (BER) performance that is closer to the Shannon Limit than other available technologies.

Customers using Comtech AHA's LDPC error correction technology will be able to use their existing communications channel more efficiently than with other methods.

The superior performance of the LDPC codes allows for increased transmission distance or reduced transmission power for a wide variety of communications systems.

Comtech AHA's DVB-S2 LDPC core is faster, more efficient, and more flexible in the codes it supports than other cores available today.

The DVB-S2 LDPC core provides benefits in many applications such as Vsat, broadcast services, digital TV contribution, satellite news gathering, backhaul and other emerging markets.

"Comtech AHA's expertise in forward error correction allowed us to create the highest performing LDPC solution available today", said Bill Thomson, President of Comtech AHA.

"Our DVB-S2 LDPC core supports all of the codes in the DVB-S2 standard as well as the ACM and VCM modes".

"This enables our customers to efficiently improve the performance of their communication systems".

In addition to the DVB-S2 LDPC core, Comtech AHA also offers a 30Mbit/s LDPC core.

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