MDS America Designed Components

MDS America markets a broad array of communication equipment. These products are designed for use within the MDS systems such as the MDSA MVDDS MPEG-2 DVB TV and Internet system.

MDSA MVDDS MPEG-2 DVB TV and Internet System


The MDSA MVDDS terrestrial broadcasting system provides a number of valuable solutions in high-speed internet connectivity, digital TV broadcast and Satellite rebroadcast. The system's versatility, quick implementation time and cost effectiveness make it a very attractive alternative to cable and satellite service.

The MDSA MVDDS system allows TV service operators to provide subscribers programming from a number of sources. The system can transmit programming directly from a production studio, in addition to local channels, premium channels, pay per view and re-broadcasted satellite channels. The MDSA MVDDS can be configured to transmit programming from all these sources simultaneously, while providing high-speed internet access.

Design Capabilities

MDSA MVDDS offers the consumer more than 130 analog or High Definition channels on a wireless link, including multi language and Hi-Fi stereo sound, and up to 2000 digital MPEG-2 DVB channels and 5 Gbps Internet Access.
How it Works

At the Head-end: The satellite or terrestrial television programs and the local video productions are transmitted from the digital Head End or analog Head End with a discrete omni-directional or directional antenna to the consumers. The signal may be received up to 200 kilometers from the transmitter with a very small antenna.

At the Subscriber-end: The TV signal delivered by MDSA MVDDS can be processed with the our Analog and Digital Decoder, thus allowing the operator to manage subscription or pay-per-view at his liking.


MDSA MVDDS may also cover a wider area, such as a city or a country, by using a cellular structure, without any interference between the channels of the multiple cells or to existing DBS service. Only one low price Booster is needed to relay hundreds of analog or digital channels over many kilometers. Even a mirror or a piece of metal can reflect the signal of thousands of channels over kilometers.

Advantages of MDSA MVDDS

MDSA MVDDS is available at a very low cost, owing to the use of QPSK modulation, which needs far less powerful transmitters than A.M. (4 Watt Power can cover 200 km radius range.)

Since it is a wireless system, MDSA MVDDS only needs a few months to be fully operational, without the cost of complex engineering and public works.

MDSA MVDDS is ready for the wireless cable superhighway and can transmit NTSC-PAL-SECAM-MPEG-2, any existing and future TV standard. More than just another transmission system, MDSA MVDDS is a step towards global wireless communication.

MDSA MVDDS has a very large channel capacity, as well as extremely high picture and sound quality.


In keeping with the systems design, the applications of this system are numerous. The MPEG-2 DVB MDSA MVDDS system can be configured in a number of ways to achieve a number of purposes:

  •     Digital TV Broadcast
  •     Satellite Re-broadcast
  •     Internet Broadcast
  •     TV & Internet Broadcast

Potential Use & Real World Application

The system provides solutions to telecommunications companies, ISPs and TV programming providers using the MDSA MVDDS MPEG-2 DVB system to provide a number of services including local TV channels, Satellite re-broadcasted channels and Internet access.

MDSA MVDDS Wireless High-Speed Internet


MDSA MVDDS is an asymmetrical network system delivering data services at a high data rate to a large number of user stations via terrestrial MDSA MVDDS Transmitters using DVB standards. By using standard MVDDS (which is also used for commercial set-top boxes) and taking advantage of the high data rates available in the DVB - MPEG-2 system, a very favorable cost/performance ratio can be achieved. The current implementation can deliver data at a rate up to 60 Mbps.

Technology Overview

The architecture of the MDSA MVDDS Internet System is based on an asymmetric network, where the downstream channel has a much higher bandwidth allocation (faster data rate) than the upstream. The reasons for the asymmetric network are derived primarily from the asymmetric nature of Internet applications. Activities such as World Wide Web (http) surfing send much more data down to the computer than from the computer to the network. Mouse clicks (URL requests) and e-mail messages are not bandwidth intensive in the upstream direction. Image files and streaming media (audio and video) are very bandwidth intensive in the downstream direction.

System Concept

A central server station sends the data packets over the MDSA MVDDS Transmitter directly to the end- user station. The end-user station can access the base station in a number of ways, the telephone line/modem connection being the most popular one. This connection, called "the return link", is used for transmitting requests and control information only.
The System can operate in one of three modes:

1. Passive-receive only: For passive receive-only operation (like push Email). No return link is required at all.

2. Fully interactive: For fully interactive service, the return link must be available during the whole session.

3. Partly interactive transaction mode: For request-reply transaction services the link is only required for the transmission of the requests and can be released during the reply phase (for example the transmission of a large multimedia file). The return link can also be established with a 2 Mbps MDSA radio system.

How it Works


The basic Internet solution supplied by MDS America combines several of our components that are integrated with standard equipment:

The heart of the network, controlled by the MDSA MVDDS service provider, is the MDSA MVDDS equipment. This equipment consists of the Internet Radio Server, combining network access and conversion to the DVB transport stream format. MDS equipment integrates with the conventional equipment while utilizing available standard DVB modules.

he Internet Radio Server consists of:

  •     MDSA MVDDS Internet Gateway
  •     MDSA MVDDS Access Server
  •     MDSA MVDDS Proxy Server

MDSA MVDDS Internet Gateway provides the connectivity between the network and the MDSA MVDDS Transmitter. On the input side the MDSA MVDDS Internet Gateway connects to the network via a LAN implementing 100BASE-TX Ethernet protocol. Its output is a standard DVB on either parallel LVDS or serial ASI interface. The MDSA MVDDS Internet Gateway is linked directly to a DVB modulator (in case of SCPC transmission) or alternatively to an optional DVB MUX which in turn connects to a DVB modulator (for MCPC transmissions).

Subscriber Level

At the subscriber end, an MDSA MVDDS modem and software will be deployed. It will typically have two connections: one to the antenna and the other to the computer.

The MDSA MVDDS Modem (HC60) is a device that allows high-speed data access (such as to the Internet /Intranet) via the MDSA MVDDS terrestrial broadcasting system. MDS's HC60P allows consumers to access the Internet at a fraction of the time it takes traditional telephone modems network. More than 7 Mbs (875 Kbytes per second) can be transferred for each FTP session.

The MDSA MVDDS Modem speed varies widely. In the downstream direction (from the network to the computer), speeds can be anywhere up to 52 Mbps. The return link (from computer to network) is provided via a normal PSTN, ISDN, GSM modem or possibly PCSP2, (wireless 2 Mbps radio modem), if available, depending on the application supported.

The MDSA MVDDS Modem sends and receives data in two slightly different fashions while benefiting from the nature and architecture of the broadcasting equipment and services.

  •     In the downstream direction, the digital data is modulated and then placed on bandwidth available/allocated for this service by the MDSA MVDDS service provider (up to 52 Mbps).
  •     The return channel is trickier and utilizes the currently available telephony modem found on any PC or Macintosh (even a 1200 bps telephone connection is enough to receive the 52 Mbps Internet downstream).

To give a better idea of this kind of speed, consider the following example:

The time a 25 MB file takes to download will be:

  •     30 Kbps modem connection = 140 minutes
  •     ISDN = 70 minutes
  •     T1 = 3 minutes
  •     MDSA MVDDS System = 3 minutes 30 seconds


High Speed Internet Access (Radio and Modem ISP Configuration)

The MDSA MVDDS operator provides modem Internet services or collaborates with specific ISPs to together provide fast Internet services. The existing equipment at the ISP is configured to re-route the IP packets to the MDSA MVDDS Internet Gateway at the MDSA MVDDS Hub (Of course subscribers can still connect to the Local ISP in order to receive the high-speed network).

High Speed Internet Access (Radio only ISP Configuration)

The MDSA MVDDS operator does not provide any modem connection, only wireless high-speed access (up to 5 Gbps). The user keeps his usual modem ISP for the Requests packets. The subscriber can use any dynamic or static IP address. The subscriber can dial up to any local ISP, and receive the high-speed Internet via MDSA MVDDS.


MDSA MVDDS enables the typical array of Internet services to be delivered at speeds far faster than those offered through dial-up telephone modems. Other services may include access to streaming audio and video servers, broadcasting and multicasting of local (community information and services) as well as nation wide content sites, access to CD-ROM servers, and a wide variety of other offerings. New ideas like multi-participant net game services are being born daily.

Additional Applications:

  •     High-Speed Internet Access for Organizations
  •     MDSA MVDDS networks offer an attractive medium for providing low cost high-speed Internet/Intranet access for LAN users.
  •     High Speed Intranet Distribution
  •     Data Bank Services - Companies implementing their own private networks could establish new services or provide "on-line" services to their current customer base.

Potential Users and Real World Applications

The MDSA MVDDS's versatility, cost-effectiveness and quick implementation time make it very attractive to a number of potential users:

  •     ISPs (for high-speed backbone connection)
  •     Small to large organizations
  •     Schools equipped with computer classrooms
  •     Business centers and hotels providing Internet access as part of their services
  •     Planes, Boats, etc.

Internet MDSA MVDDS Equipment

Transmission Equipment

The basic Internet solution supplied by MDS America combines several MDS elements that are integrated with standard equipment:

MDSA MVDDS Transmitter

The MDSA MVDDS Transmitter provides the signal from the Transmission Center to the subscribers.

  •     Total traffic capacity of 5 Gbps
  •     Coverage is 200 kilometer radius range with 4 watts power
  •     A single MDSA MVDDS Transponder can provide 60 Mbps Internet bandwidth (combined with 15 digital TV channels or telephone network)

The Internet Radio Server consists of:

MDSA MVDDS Internet Gateway

  •     The MDSA MVDDS Internet Gateway is the MPEG-2 DVB Encoder, which encodes the Internet information into MPEG-2 DVB signal
  •     The Output Capacity of the MDSA MVDDS is 52 Mbps
  •     The MDSA MVDDS Internet Gateway also runs the Encryption and Quality of Service functions

MDSA MVDDS Proxy Server

  •     The MDSA MVDDS Proxy Server server can manage all the components of the high-speed network, and increases the TCP/IP performance (more than 8 Mbps per FTP session).

MDSA MVDDS Access Server Unit

  •     The MDSA MVDDS Access Server Unit includes the billingn system. Specialized billing can be realized for each subscriber depending on the amount of data transferred, time connected and Quality Of Service (guaranteed bandwidth).
  •     The MDSA MVDDS Access Server Unit also dialogs automatically with the subscriber's Receiver PC Boards, and therefore checks the PC Board serial number, User ID and User Password.
  •     It also gives the approval for high-speed routing to authorized subscribers.


  •     The Multiplexer can combine up to 15 different MPEG-2 DVB sources (TV, Internet or Telephone) into a single output for broadcasting.

PCSP2 Wireless Modem

  •     The PCSP2 is a full duplex point-to-multipoint wireless microwave link.
  •     It can be used to provide a high-speed wireless return path (2 Mbps to 11 Mbps) for MDSA MVDDS Subscribers. Therefore, subscribers will be able to download 60 Mbps and upload 11 Mbps wirelessly.
  •     Of course, each system can work alone (PCSP2 or MDSA MVDDS).

Reception Equipment

At the client site an MDSA MVDDS Decoder and software driver are deployed.

The Decoder is an internal plug-and-play PCI bus card compliant with standard PC platforms. The decoder input connects directly to the antenna.

The software driver integrates the MDSA MVDDS modem, runs under both Windows 95/98, Windows NT and Macintosh platforms, and utilizes the user's preferred Internet browser.

The MDSA MVDDS system allows TV service operators to provide subscribers programming from a number of sources. The system can transmit programming directly from a production studio, in addition to local channels, premium channels, pay per view and re-broadcasted satellite channels. The MDSA MVDDS can be configured to transmit programming from all these sources simultaneously, while providing high-speed internet access.


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