• Custom


Custom Radios/Modems

Uurmi develops a wide range of modems/radios which are suitable for installation in fixed and mobile platforms, and for operation in both meshed and star networks through all transparent payloads in the High Frequency bands.

Some of the Modems developed are:

  • High Capacity Relay Modem
  • SATCOM Modem
  • Troposcatter Modem
  • DSSS Modem
  • High Rate OFOM Modem
  • Very High rate MIMQ Modem


Uurmi SATCOM provides the communication through satellite link. It is DVB-SH based Satellite modem and supports wide band communication through satellite and operates between 1GHz and 3 GHz. The unique features of the SATCOM are:

  • Compatible with DVB-SH TDM frame structure
  • Supported data rates - 2.04 Mbps, 1.6 Mbps and 1.16 Mbps
  • QPSK Modulation with bandwidth up to 3 MHz
  • RRC filter with roll off factors 0.15, 0.25 and 0.35
  • Supports time interleaver for performance improvement in fading scenarios
  • Supports link layer interface with stream and mode adaptation for video streaming applications
  • FSM based demodulator with four states
  • Turbo encoder and iterative MAP decoder with number of configurable iterations
  • Receiver sensitivity up to -106 dBm
  • Supports carrier re-acquisition under adverse channel conditions

High Capacity Relay Radios/Modem

HCRR consists of two main units, IDU, ODU. The core functionality of the IDU is to multiplex the input data from the various interfaces. A fixed size payload consisting of EOW and the NMS data appended to the Multiplexed trunk data to form Air Interface Data. ODU Control data, if any, is appended to the Air Interface data to form a single frame to be sent over the OFC link.

In the receive direction the data received from ODU demodulator is multiplexed with the ODU BITE/feedback information, if any, and transmitted back to IDU through the OFC link. The data received at the OFC link is De-Multiplexed for the Air interface data and the ODU feedback data. The Trunk data, EOW and NMS data is De-Muxed from the Air interface data, followed by subsequent framing back to the respective LAN/WAN links at the IDU.


Relay Radio