Comtech EF Data CMR-5975 Manuale Utente

ADVANCED COMMUNICATION SOLUTIONSJohnny MarmolejosJohnny MarmolejosSr. Sales EngineerSr. Sales Engineer16 June16 June’’ 0909Technologies that Technolog

Coding Gains• Satellite Links are inherently noisy / weak links, so we need to add layers of coding to improve the connection• Scientists essentially

Coding Gains• For One-Way non latency sensitive links LDPC&BCH coding is the best available• LDPC is quite simply the best error correction codec

Coding Gains• Interesting “Quotes”“ the LDPC code, was selected from amongst seven proposals, and the comparison required something like one million G

What do coding gains give me?• The new DVB-S2 codec (LDPC) allows for some real-world savings• Now that you have a codec with an additional 2.5dB in c

Is LDPC&BCH always the right choice?• In the one-way broadcast world it is hard to argue that any other codec should be used• Reasons to choose ot

Tradeoff between coding gain and latencyCodec Performance Latency Used WhereDVB-S2 LDPC Long BlockBest throughput vs. power>100ms @ 2Mb<25ms @ 1

Power, Bandwidth and Throughput Tradeoff• Power: Eb/No, Es/No, C/N (dB)• Bandwidth: Spectral Efficiency (SE) Mbps/Hz• Throughput: Mbps• Various Types

Power, Bandwidth and Throughput TradeoffBandwidth• Transponders have 2 finite resources:• Power – Watts or dBW available• Bandwidth (BW) – Hz availabl

18DVBDVB--S2 Spectral Efficiency (bps/Hz) versus C/N (dB)S2 Spectral Efficiency (bps/Hz) versus C/N (dB)0,00,51,01,52,02,53,03,54,04,5-3-2-10123456789

19Power & Bandwidth Tradeoffs Example Same Throughput Ù Less Power Same Power Ù Less Bandwidth• DVB-S versus DVB-S2– Lower Eb/No requires less pow

Agenda• Company Overview• Technologies That Drive Efficiencies– Modulation and Coding Improvements– Power, Bandwidth and Throughput Tradeoff– Equaliza

OPEX Reduction Example 1 SD Channel:SD 4Mb MPEG-2 Chan. SD 4Mb MPEG-2 Chan. SD 2Mb MPEG-4 Chan.DVB-S DVB-S2 DVB-S2QPSK 3/4 Rate FEC 8PSK 3/4 Rate FEC

Frequently Encountered Impairment• Amplitude and Group Delay Variation (linear)– Degrades performance• Solution– Automatically equalize uplink • Advan

AutoEQ™ Application In Latin America• AutoEQ™ DM240XR Modulator Option– Equalizes uplink and transponder  Corrects amplitude and group delay– Only L-

ADVANCED COMMUNICATION SOLUTIONSComtech EF Data Comtech EF Data Solutions For Solutions For BroadcastBroadcast1 Way1 Way2 Way2 Way““Your WayYour Way””

Broadcast (One Way) Solutions• DTH (Direct To Home Broadcast)• Contribution Feeds– Digital Satellite News Gathering (DSNG)– Fly-Away Packages• HITS (“

One Way - DTH (Direct To Home Broadcast)• Comtech has the widest selection of DTH satellite uplink hardware:– Satellite Modems & Modulators– Frequ

One Way - DTH (Direct To Home Broadcast)• Over 4,000 satellite modems/modulators sold to DTH providers worldwide• Frequency converters average over 35

One Way – SNG & Fly-Away• Video Encoders• Satellite Modulators• Freq. Converters• Compact Amplifiers• Confidence MonitorsComtech Proprietary &

One Way – HITS / IPTV and File Based Feeds• Delivery of video, advertising, local programming• Non Real-Time file based platformComtech Proprietary &a

29One Way - Avail Media Case Study IPTV Service Provider• Aggregate over 180 channels of Standard Definition Programming and 16 channels of High Defin

• Comtech Telecommunications Corporation is the parent company of Comtech EF Data• Founded in 1967• Market leader in delivering advanced communication

30One Way - Avail Media Case Study IPTV Service ProviderCME-5110DVB IP Encapsulator(18) CMR-5975DVB-S2 ReceiversCDM-710DVB-S2 Modulator

Broadcast (Two Way) Solutions• Point to Multi-Point IP Networks• Rapid ISP market penetration• High Speed Content Delivery• IPTV / Business Television

Two-Way CCM&VCM CDM-740 Value Proposition• Integrated 1 RU solution with DVB-S/S2 receiver and Turbo SCPC return modulator– Shared high speed outb

Broadcast (Two Way) SolutionsComtech Proprietary & Confidential33IP NetworkCloudDM240XRCMR-8500CDD-564/L StackGig-ESWIPIPIPIPSite 1CDM-740IPSite 2

Two Way - DVB-S2 CCM & VCM Operation34

DVB-S2 CCM vs. VCMCase 1• Point to Multi-Point networks that use CCM must have all sites receiving the same Coding and Modulation• Networks where all

DVB-S2 CCM vs. VCM36ZONE 1EIRP = 52 dBWZONE 2EIRP = 50 dBWZONE 3EIRP = 48 dBW• Consider a point to multi-point network consisting of a hub and 3 remot

DVB-S2 CCM vs. VCM37ZONE 1EIRP = 52 dBWZONE 2EIRP = 50 dBWZONE 3EIRP = 48 dBW• VCM takes advantage of the different EIRPs• Each EIRP has a “best fit”

DVB-S2 CCM vs. VCM38Zone 2Zone 3Zone 1ZONE 116-APSK 2/3ZONE 28-PSK 2/3ZONE 3QPSK 4/5• By associating a MODCOD per EIRP zone we can maximize the throug

ADVANCED COMMUNICATION SOLUTIONSQuestions?Questions?Thank You!Thank You!

Company Overview• Our products are optimizing satellite links for commercial and government customers– Satellite Operators– Cellular Service Providers

ADVANCED COMMUNICATION SOLUTIONSVCM ExampleVCM Example

VCM Example: Maximize Throughput• In this example we will fix our Carrier BW at 13.33 Msps (18Mhz) and maximize the throughput to all 3 sites.• Our mo

VCM Example: Maximize Throughput4213.33Msps = 35.2MbpsZone 1: EIRP = 52–53 dBWEs/No = 9.0 – 10.2dB13.33Msps = 26.4MbpsZone 2: EIRP = 51–52.9 dBWEs/No

VCM Example: Maximize Throughput• Each zone gets an equal share of the BW. The network now has an average throughput of 27.6 Mbps43Site A Site B Site

VCM Example: Minimize Bandwidth• In this example we will fix our effective data rate of the network to 21.2 Mbps (7 Mbps per site) and minimize BW• Ou

VCM Example: Minimize Bandwidth4521.2Mbps = 8.0MspsZone 1: EIRP = 52–53 dBWEs/No = 9.0 – 10.2dB21.2Mbps = 10.7MspsZone 2: EIRP = 51–52.9 dBWEs/No = 6.

VCM Example: Minimize Bandwidth• The network now has an average BW of 10.7 Msps (14.41Mhz). Each zone gets an unequal share of the BW. 46Site A Site

DVB-S / DVB-S2 CCM / DVB-S2 VCM Big Picture47DVB-S DVB-S2 CCM DVB-S2 VCMIncrease Throughput : Fixed BW16.4 Mbps 21.2 Mbps 29% > DVB-S27.6 Mbps 68%

ADVANCED COMMUNICATION SOLUTIONSTools And CollateralTools And Collateral

Comtech Proprietary & Confidential49

ADVANCED COMMUNICATION SOLUTIONSTechnologies That Technologies That Drive EfficienciesDrive Efficiencies

Tools• Bandwidth optimization (online only) – Satellite link with cost optimization http://optimize.comtechefdata.com/• Reducing Total Cost of Operat

Collateral – Available Online or CD• Company Overview Brochure• Datasheets• Manuals• Quick Reference Guides for Modems and RF• White Papers and Applic

ADVANCED COMMUNICATION SOLUTIONSContact Us:Contact Us: 2114 West 7th Street2114 West 7th Street Tempe, AZ 85281Tempe, AZ 85281 USAUSA Tel 1.480.333.22

Technologies That Drive Efficiencies• Modulation and Coding Improvements– Modulation Types and Tradeoffs– Coding efficiencies and new standards• Power

Modulation and Coding Improvements• Modulation improvements:– Improvements have focused on structure of constellation– Constellations have been optimi

Modulation Improvements: ConstellationComtech Proprietary & Confidential 8Efficiency Legacy Method Newer Method Reason2 Bits / Hz &3 Bits / Hz

9Modulation and Power Equivalent Bandwidth (PEB)Relative Bandwidth (%) – for same data rate-110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40