What is DTMD?
DTMD is a wireless infrastructure for the delivery of bandwidth and data. It is designed to replicate the capabilities of orbital satellites in a terrestrial setting and at much lower costs. DTMD Access Point is a PoE ( IEEE 802.3 ) device similar to WiFi and Wireless LAN. DTMD operates on the Ku or Ka band. From a head-end facility, bandwidth and data are distributed via a mesh network of Access Points, each emitting about 100mW of power yet covering a range of 60 kilometres or more. Similar to orbital satellites, DTMD requires a line-of-sight to the access points.
As an alternative to orbital satellite communications, DTMD’s Earth-based satellite infrastructure is able to offer similar services, including: Wireless Multi-Channel TV similar to DTH, Broadband Distribution similar to VSAT-based broadband, Satellite News Gathering / Remote Broadcast Coverage, Distance Education, Digital Signage Networks.
The Technology
DTMD is a terrestrial based satellite content delivery platform for sending wireless multi-channel video and data. It operates on a reusable spectrum and employs a Proprietary Software implemented over low cost software defined hardware, a customized Antenna and iSFN carrier repeatation technique where multiple access point can be meshed to cover a wide region or country.
DTMD is a Disruptive Innovation...
The Frequency
DTMD operates on a mesh of Access Points tuned to a frequency range of 10-13 GHz (also available in 17-24 GHz version). According to the NTC National Radio Frequency Allocation Table (NRFAT), this range is unpopulated and or reusable. DTMD emits less than the NTC regulated output power level therefore poses no threat to present user of these frequencies, much less to any CATV .
Spectral Reuse and Intereference Issue
DTMD system offers a novel method of spectral reuse. Abundant spectral bands which are being used by downlink satellite providers can be reused by a terrestrial system. A method of deploying a Low Vertical Angle phased array antenna is taken to enable transmission flexibility while employing a form of spatial diversity. Here is more...
The Range
DTMD Access Points employs a proprietary low vertical angle antenna (180H/5V beam) and are able to transmit data across a range of 30 to 60 kilometers or more. Despite its expansive reach, the AP device only emits 20dB of output power. Here is why...
The Coverage
DTMD can cover a region or a country through a mesh of solar powered Access Point installed on mountain tops. An Access Point can receive and transmit signal from another access point the same time, at the same frequency without interfering with one another. A proprietary iSFN technique is utilized avoiding intensive conventional GPS based synchronized SFN.
License-Exempt Low Power Access Points
The DTMD Access Point is a PoE ( IEEE 802.3 ) device similar to WiFi and Wireless LAN. It is designed to emit an output power of 100mW exempting it from licensing, per Memorandum Circular No. 11 issued in 1972 by the Radio Control Office, the forerunner of the NTC.