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Comtech Telecommunications Announces New Bandwidth-Efficient Modulation and Forward Error Correction Options for Satellite Modems

October 25, 2001 at 12:00 AM EDT
Comtech Telecommunications Announces New Bandwidth-Efficient Modulation and Forward Error Correction Options for Satellite Modems
  • Saves Satellite Transponder Bandwidth And Cost - Includes Turbo Product Coding
  • Bandwidth Reductions Of Up To 50% For Traditional QPSK And Intelsat 8-PSK TCM
  • Up To 20 MBS Data Transmission Compliant With All Intelsat Open Networks
Melville, New York - October 25, 2001 --- Comtech Telecommunications Corp. (Nasdaq: CMTL) today announced that its Arizona subsidiary, Comtech EF Data Corporation, is now offering new bandwidth-efficient modulation and Forward Error Correction (FEC) options for its CDM-550T, CDM-600 and SDM300A/L satellite modems. These new options, which include combinations of higher-order modulation and Turbo Product Coding, permit satellite operators to further optimize power and bandwidth savings when using the latest generation of high power transponders. In August 1999 Comtech became the first company in the world to begin full-scale commercial deployment of Turbo Product Coding (TPC) in satellite modems. Comtech has now deployed several thousand TPC-coded modems, and Comtech's TPC performance specifications have become the de facto standard.

The capabilities of the CDM-600, which is fully compliant with all Intelsat Open Network specifications and provides data transmission up to 20 Mbits/second, have been greatly enhanced with the addition of 16-QAM modulation employing both TPC and Viterbi/Reed-Solomon FEC. This modulation type permits transmission of data in only 50% of the bandwidth required by traditional QPSK modulation. An 8-PSK TPC mode has also been added that provides both power and bandwidth savings of up to 20% when compared to the current Intelsat 8-PSK TCM standard. The enhanced features will significantly lower the overall cost of data transmission over satellites compared to the older FEC schemes employed presently.

Both the CDM-600 and CDM-550T benefit from the addition of Offset QPSK with Turbo Product Coding, permitting operation of satellite uplinks through saturated high power amplifiers. This has particular significance for certain military applications, and was developed specifically at the request of a Comtech customer planning to provide a large satellite network to the US military. Customers who have already purchased CDM-550T or CDM-600 modems will be able to field-upgrade existing units using Comtech's proprietary Flash technology.

The SDM-300A/L modem, which is fully compliant with all Intelsat Open Network specifications and provides data transmission up to 5 Mbits/second, has been upgraded with its own TPC codec that provides full compatibility with the CDM-550T and CDM600 in all TPC modes through 8-PSK.

Fred Kornberg, President and CEO of Comtech, stated "these innovations in combining higher order modulations with Turbo Product Coding further allow telecommunications providers to save satellite transponder costs. It is a clear demonstration of Comtech's continuing leadership in digital satellite modem design and our dedication to provide the modem user with the very latest in technological advances. Our commitment to investing in R&D continues to pay off, and yet again, Comtech EF Data is setting new standards for the rest of the industry to follow."

Comtech EF Data Corp. (www.comtechefdata.com) designs, manufacturers and markets a broad spectrum of Frequency Up and Down Converters, Solid State Power Amplifiers, Satellite Modems and C- and Ku-Band Transceivers, Internet Enabled Modems, MultiCast and UniCast Networks and the MIDAS Bandwidth on Demand System. All products meet or exceed the standards published by Intelsat, Eutelsat, Insat, AsiaSat and other worldwide and regional satellite networks.

Comtech Telecommunications Corp. is an innovative player in the domestic and global high-technology markets. Through its operating units, Comtech pursues opportunities in three interrelated market segments: telecommunications transmission, RF microwave amplifiers, and mobile data communications services. In each of these segments, growth is driven by increasing demand for telecommunications infrastructure and network and messaging services. The company's specialties include the design and manufacture of advanced products and networks used for transmission of voice, data and video using satellite, over-the-horizon microwave, terrestrial line of sight and other wireless communications systems. More than 275 distinct Comtech products are in service in more than 100 countries.