The hottest software defines radio SDR technology

Software Defined Radio (SDR) technology helps communication equipment

Software Defined Radio (SDR) technology is widely used in many military applications, and there are many of them in commercial applications, especially in the amateur radio and short wave radio equipment market. This radio technology uses digital signal processing (DSP) to replace the functions previously performed by analog hardware, so it can not only achieve flexible interoperability between many different existing radio platforms, but also define and modify customized waveforms (when necessary) to maintain a high degree of security in tactical communication

software defined radio technology benefits from the funding of the United States Department of Defense (DoD) for the joint tactical radio system (JTRS) program and various supporting programs, including the design of portable ground mobile radio (GMR) for the U.S. Army. The basic idea of JTRS radio system is to provide a key communication platform for all joint forces, process new waveforms through software programming, and simulate the communication between current military radio and existing tactical radio

funding for JTRS and SDR technology has been ongoing. Earlier this year, BAE Systems announced a $9.4 million contract to provide Link-16 software service support (Swiss) to JTRS. The contract includes technical support, function enhancement, maintenance and upgrading of JTRS Link-16 waveform software. If all options are included, the total price of the whole project will reach US $24.3 million

almost at the same time, scalable network technologies (SNT) obtained the independent SBIR phase III Basic irregular delivery/uncertain quantity (id/iq) contract approved by the joint tactical radio system project Joint Program Executive Office (jpeo JTRS). The contract is estimated to be worth $11million, and the main purpose is to support JTRS network simulator, a virtual laboratory for real-time simulation of large-scale (up to thousands of stations) communication networks with different types of waveforms

also at the beginning of this year, Lockheed Martin and its air, sea and fixed station joint tactical radio system (AMF JTRS) team successfully demonstrated with the support of Boeing that it has very perfect stability. Based on 4. No action when turning on the power, please confirm: 1. The JTRS radio system that touches the limit SDR is used in the AH-64D Apache (block III Architecture) helicopter. The test includes data and video transmission from helicopters to ground stations. Lockheed Martin's AMF JTRS is a secure, multi band, multi-mode radio network that can provide simultaneous voice, data, and video communications to joint forces. In this demonstration held at Boeing's mesa, Arizona plant, the AMF JTRS team integrated the AMF JTRS small air force Joint Tactical Radio equipped with broadband link waveform (WNW) function into the Apache helicopter. In this way, AMF JTRS can send live streaming video and real-time situation data from Apache airborne infrared cameras to multiple ground stations

in the field of radio equipment itself, Harris has long been committed to developing tactical radio technology and providing relevant analog and digital designs. In fact, the company's history of researching SDR technology can be traced back to the production of rf-5000 radio in 1988. Many of Harris' SDR platforms adopt the software communication architecture (SCA) infrastructure specification for JTRS radio communication development. Falcon II radio station is one of the most popular Harris SDR tactical radio equipment, with more than 15000 units in service at present

there are also many companies famous for other products, such as Rohde & Schwarz, which has been committed to the production of test equipment. The SDR products independently designed by them have also made great contributions to the development of SDR technology in exploring a new development path of plastic granulator technology, including r&s m3tr SDR. These radio equipment (Figure 1) include r&s mr300xh/u single soldier transceiver, whose frequency range is from 1.5MHz to 108MHz or 25MHz to 512mhz, which promotes the composition of the oil and gas supply chain with 8 ports as nodes. This is a kind of equipment developed for all tactical communications. These multi band, multi-mode radio devices can handle a wide variety of waveforms, and have embedded 256 bit key communication security (COMSEC) protection function

Figure 1: r&s m3tr software defined radio products of rod and Schwartz include single person portable and lightweight handheld versions, with an operating frequency of 512mhz

these single portable radio devices can provide transmission power levels of 150W at high frequency (1.5 to 29.9mhz), 50W at VHF (30 to 107.9mhz), and 50W at UHF (108 to 512mhz). These radios also integrate global positioning system (GPS) receivers and position reporting functions, and the front panel is removable, with good flexibility

National Instruments (Ni) is another testing related company that can also provide SDR solutions. The SDR system of the company is based on PXI express platform and uses Ni's pxie-5641r Rio transceiver. The operating frequency range is from 9KHz to 2.7ghz, and it has 20MHz real-time bandwidth

although SDR technology is mainly used in military tactical radio equipment, it has also been rapidly popularized in the field of commercial applications, especially in the field of amateur radio design and short wave radio. For example, flexradio systems' radio series is a product developed using SDR technology and widely used by amateur radio enthusiasts

for example, the flex-3000 radio system has a 96KHz receiving bandwidth and a dynamic range of more than 90dB. It adopts 24 bit analog-to-digital converter (ADC) and digital to analog converter (DAC), and all receiving and sending filtering functions are completed in the digital domain with the help of DSP

in terms of components, many suppliers support the integration of their digital components into the software defined radio architecture. For example, Texas Instruments (TI) provides a complete SDR module block diagram (using Ti components at key locations) on its station (docs/solution/folders/print/ml)

National Semiconductor (NSC) provides high-speed 12 bit ADC for SDR, and fully provides on-site technical support for the development of SDR design. Altera, a member of the software defined radio forum, provides high-performance Stratix FPGA for digital IF and baseband processing in SDR

in terms of software developed by SDR, GNU radio provides a free software development tool suite that can be used to develop SDR processing modules using low-cost rf hardware. Green hills software provides royalty free and the latest IEEE posix The integrity real-time operating system (RTOS) certified by the specification can be used for the development of SCA compatible SDR platform