SOURCE: IDRW.ORG.
The Indian Army, under the Ministry of Defence, has released a Request for Information (RFI) to procure approximately 5,000 to 10,000 Software Defined Radios (SDR) for vehicular applications. This new communication system aims to enhance tactical vehicular radio communication across a wide range of military vehicles, providing reliable and resilient communication capabilities essential for modern warfare. These SDRs will play a vital role in equipping the Indian Army’s vehicular fleet, from heavily armored tanks to lighter utility vehicles, with advanced, adaptable communication tools.
The SDRs are intended to support vehicular communication for both A and B category vehicles used by the Indian Army. Category A vehicles include heavily armored and specialized vehicles like tanks, while Category B vehicles cover light utility and logistical support vehicles. By equipping both categories, the SDRs will create a standardized communication network across the vehicle spectrum, ensuring secure, reliable, and high-quality communication channels across the battlefield.
Software Defined Radios offer significant advantages for military applications, primarily due to their flexibility. Unlike traditional radios, SDRs use software to handle radio functions, allowing operators to adjust frequencies, power outputs, and bandwidths on the go. The technology enables easy upgrades, compatibility with various communication protocols, and interoperability with allied forces. Given the diverse terrain and tactical needs of the Indian Army, this adaptability is especially valuable.
Key Requirements for the Software Defined Radios (Veh)
The Indian Army has outlined specific operational and technical criteria to ensure that the SDRs meet the demanding requirements of military use. Here are the main features outlined in the RFI:
Seamless Battery Transition: The SDR must be able to switch automatically to battery power if mains power is interrupted, ensuring no communication lapse. This design element is crucial to guarantee uninterrupted communication during power transitions, such as when a vehicle is switched off or in situations where primary power sources may be compromised.
Lightweight and Ergonomic Design: The SDRs should be compact, light, and ergonomic to facilitate ease of use in confined spaces typical of military vehicles. This design will allow personnel to operate the radio systems efficiently, even in challenging field conditions.
Power Source Compatibility: The SDR must be compatible with multiple power sources. It should operate on 12 V 75 AHC secondary batteries and be able to draw power directly from existing vehicle batteries, including those used in armored vehicles such as BMPs and tanks. Additionally, the SDR must operate on a 230V AC source with an adaptable power supply unit, allowing seamless switching to battery power if there is a mains power failure.
Uninterrupted Communication During Engine Cranking: To prevent interruptions during critical communication moments, the SDR should be designed to avoid rebooting or communication loss when a vehicle’s engine is cranked. This feature will ensure continuous communication, vital for operational cohesion, especially in active or hostile environments.
RF Power Output Flexibility: The SDR is expected to come with two Radio Frequency (RF) Heads—one for VHF/UHF bands and another for L-Band frequencies. Each RF Head should have a power output of 50W or higher, with additional configurations allowing for lower power output. The adjustable power feature will enable flexible communication range management, maximizing operational efficiency across varied tactical scenarios.
Extended Range Capability: To meet the Army’s tactical range needs, the SDRs should offer communication ranges of over 30 kilometers when using a GPA (Ground Plane Antenna) or rod antenna. This range capability will be crucial in covering extensive operational areas, allowing units to maintain contact even in geographically challenging terrains.
The RFI is the first step in a multi-phase procurement process that will likely involve testing, evaluation, and selection before a formal contract is awarded. Given the Ministry of Defence’s emphasis on supporting the Make in India initiative, domestic defense companies may be prioritized for the development and production of these SDRs. By supporting local manufacturing and innovation, India can enhance self-reliance while developing a robust defense manufacturing ecosystem.
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