Signal Processing / Demodulators

Signal Processing - Miniatures

SI-9475 MINIATURE FIREWIRE IF DIGITIZER

The SI-9475 is a miniature IF digitizer that accepts a 21.4 or 70 MHz analog IF output from a mated receiver or tuner and outputs In-phase and Quadrature (I&Q) IF data over an IEEE-1394a Firewire interface. It allows the transfer of IF data on to a personal computer (PC) for real-time signal monitoring or subsequent processing of collected missions. The SI -9475 supports real-time collection for IF bandwidths of up to 5 MHz. For wider bandwidths, the module supports snapshot operation. The SI-9475 can be used with the SI -8614-X Nanoceptorä VHF/UHF receiver or the SI-9144 Dual-Channel Tuner to create miniature RF-to-IF data processing and collection systems. The SI-9475 may also be used with other DRS Technologies receivers and tuners that have a 21.4 or 70 MHz wideband IF output.

The SI-9475 offers three wideband IF input configurations: single- or dual-input 70 MHz versions and a single-input 21.4 MHz version. These hardware configurations support single or multiple field-programmable gate array (FPGA) digital downconverter (DDC) loads. FPGA downloads also provide 11 digital IF filters ranging from 10 kHz to 20 MHz in the 70 MHz configurations and ten digital IF filters ranging from 10 kHz to 10 MHz in the 21.4 MHz configuration. Also made available via FPGA downloads to the dual 70 MHz configuration are three DDC options. These DDC options provide multiple DDC outputs multiplexed onto the Firewire bus. One option provides two tunable digital downconversion outputs, with five IF bandwidths ranging from 2.5 kHz to 200 kHz. The second option provides six tunable DDC outputs with a 280 kHz bandwidth. The third option provides six tunable DDC outputs at a 16 kHz bandwidth.

SI-9475 Highlights

• Accepts 70 MHz or 21.4 MHz analog IF inputs
• Digital IF output on IEEE-1394a Firewire interface
• Programmable IF filtering
• Single or multiple digital downconversion
• Multiple collection operations – real time up to a 5 MHz signal bandwidth or snapshot up to 20 MHz
• Weighs less than 0.9 lbs
• Compact size, 3W x 5L x 1H inches
• Allows IF data storage for processing, data collection for signal monitoring and fast sweep collection for SIGINT application
• Downloadable FPGA and DSP for future enhancements

Public Release IAW 22 CFR (ITAR) 120.11(7). Export of DRS SIGNAL SOLUTIONS, INC. products is subject to U.S. export controls. Licenses may be required. This material provides up-to-date general information on product performance and use. It is not contractual in nature, nor does it provide warranty of any kind. Information is subject to change at any time. Copyright © DRS SIGNAL SOLUTIONS, INC. 2003. All Rights Reserved.

SI-9479 Picoprocessor™ Family IF/Baseband Digitizer/Signal Processor

The SI-9479 Picoprocessor™ is a miniature, lightweight and low power IF/baseband digitizer and signal processor that is capable of outputting complex in-phase and quadrature-phase (I&Q) IF data or demodulated audio through its USB2.0 OTG interface.  The SI-9479 allows IF information from one or two RF channels to be digitized and processed within the module or transferred to an external PC for further processing.  The SI-9479 is constructed using field programmable gate array (FPGA) technology for flexibility in system designs.  The SI-9479 can be scaled for complex high-speed data processing or simpler operations when low power consumption is a must. A system-on-chip (SOC) with a PowerPC processor core running an embedded Linux Operating System (OS) is the key to the SI-9479's scalability. The standard SI-9479 is preloaded with narrowband signal processing functionality that is optimized for low power consumption. The unit permits users to download their own custom signal processing algorithms that can operate autonomously or in conjunction with standard DRS Technologies processing algorithms. The optional Picoprocessorä Developer's Package (PDP) is available as a tool for developing custom applications for the SI-9479.

The SI-9479 is compatible with the SI-9144 VHF/UHF Dual-channel Tuner and the SI-8614 VHF/UHF Nanoceptorä family of receivers. Various unit models have been designed for users that require better digitizer performance or additional processing resources. The standard unit uses a 10-bit analog to digital converter (ADC) and a Virtex-4 FX12 FPGA. The SI-9479A consumes an additional watt of power but contains a 14-bit digitizer.  The SI-9479B contains a large FX60 FPGA and a 14-bit digitizer.

SI-9479 Highlights:

• Accepts two 70 MHz analog IF inputs or baseband signals up to 25 MHz
• 10- or 14-bit ADC and Virtex-4 FX12 or FX60 FPGA configurations
• Single or multiple digital drop receivers with AM, FM, CW, USB and LSB demodulation
• Programmable IF filtering up to 200 kHz (optional IF filtering up to 25 MHz)
• Digital IF with time-stamped I&Q data or demodulated data output
• User-programmable GPIO for antenna control, event trigger, and 1 PPS
• SIGNIT applications include two-channel DF, TDOA geolocation, demodulation, and fast spectral search
• Field upgradable SDR-compatible embedded Linux platform with built-in web-based control GUI
• Excellent size, weight and power (SWaP) characteristics

Public Release IAW 22 CFR (ITAR) 120.11(7). Export of DRS SIGNAL SOLUTIONS, INC. products is subject to U.S. export controls. Licenses may be required. This material provides up-to-date general information on product performance and use. It is not contractual in nature, nor does it provide warranty of any kind. Information is subject to change at any time. Copyright © DRS SIGNAL SOLUTIONS, INC. 2006. All Rights Reserved.

Signal Processing - PCI

SI-9483-1 WIDEBAND PCM DEMODULATOR

The SI-9483-1 provides high-performance digital demodulation in a low-cost personal computer (PC) expansion card. The SI-9483-1 is a software-defined digital demodulator card set featuring field programmable gate arrays (FPGAs). The PCI-AT form factor card set is designed to be installed in a full-length peripheral component interconnect (PCI) slot of a PC. The demodulator card processes a variety of high-bandwidth signal formats and provides parallel-decoded output symbols or soft decision data for channel processing. The software includes the demodulation algorithms and a graphical user interface (GUI). The demodulation algorithms are defined by the software executables for the card’s FPGA and general-purpose digital signal processing (DSP) ICs. New algorithms can be developed at the factory and new software executables delivered for field upgrade. The graphical user interface utilizes a client/server network that can be accessed from the host or a remote computer using a standard web browser (Netscape® Navigator or Microsoft® Internet Explorer).

SI-9483-1 Highlights

• Low-cost, high-performance, PCI interface, PC based demodulator
• Demodulates:
  • 2-, 3- & 4-level FSK
  • BPSK, QPSK, 8PSK
  • Staggered QPSK
  • 16-, 32- & 64-level QAM
• Processes 1 to 42 MBaud symbol rates
• 140 MHz IF input, 70 MHz signal bandwidth or unfiltered 70 MHz IF input
• Adjustable feed forward and decision feedback equalizers
• Field upgradeable with new FPGA/DSP algorithms
• Client/Server-based graphical user interface for configuration, status, and analysis
  • Multi-platform (Microsoft Windows® and Red Hat® Linux®) operating system support
  • Control from host or remote computer using web browser interface
  • Real-time constellation, equalizer, and IF spectrum displays
• 10-bit analog-to-digital converter operating at 186.67 MSPS
• Automatic and manual fine tuning
• Automatic and user-selectable baseband filters

DRS-SS APR. Export of DRS SIGNAL SOLUTIONS, INC. products is subject to U.S. export controls. Licenses may be required. This material provides up-to-date general information on product performance and use. It is not contractual in nature, nor does it provide warranty of any kind. Information is subject to change at any time. Copyright © DRS SIGNAL SOLUTIONS, INC. 2003. All Rights Reserved.

SI-9485 Wideband PCM Demodulator and Decoder

The SI-9485 provides high-performance digital demodulation and decoding in a low-cost personal computer (PC) expansion card. The SI-9485 is a software-defined card set utilizing field-programmable gate array (FPGA) integrated circuits to provide real-time wideband signal processing in a single-slot, half-length PCI card set. The demodulator processes a variety of narrow to high bandwidth signal formats and provides soft decision data to the decoder. The decoder removes transmission formatting including framing, interleaving and scrambling, and executes block and convolution decoding algorithms to extract the transmitted data. The data is provided over the PCI bus, allowing the user to record or to perform additional processing using host computer resources. Software executables define the demodulator and decoder algorithms, enabling the unit to be upgraded in the field with a software download. The user commands and controls the SI-9485 using a board-level C programming language driver.

SI-9485 Highlights

• Single-slot half-length PCI card
• Operates in PC server, Linux® OS
• 160 MHz IF input, 48 MHz signal bandwidth
• 10 MHz external reference input
• 1.2 kbaud to 40 Mbaud symbol rates
• Demodulates
  • FSK, MSK, GMSK
  • ASK, QAM, PSK
  • DBPSK, Pi/4 DQPSK, PPM
• User-configurable decoder
  • Viterbi & Reed Solomon decoders
  • Deframer
  • Deinterleaver and derandomizer
• Outputs 40 Mbits/second on PCI bus for processing/recording
• Supports dynamic environment
  • Field-upgradeable with new algorithms
  • 256-tap (baud rate dependent) feed forward and decision feedback equalizers
  • Automatic and manual fine tuning and gain control
  • Programmable constellation map

Cleared by U.S. DoD/OSR for Public Release under OSR case number 08-S-1760 dated June 6, 2008. Export of DRS SIGNAL SOLUTIONS, INC. products is subject to U.S. export controls. Licenses may be required. This material provides up-to-date general information on product performance and use. It is not contractual in nature, nor does it provide warranty of any kind. Information is subject to change at any time. Copyright © DRS SIGNAL SOLUTIONS, INC. 2005. All Rights Reserved.

Signal Processing - Rack Mount

SI-9484-1 Wideband PCM Demodulator

The SI-9484-1 Wideband PCM Demodulator provides low-cost, high-performance digital demodulation in a compact personal computer (PC) chassis. The SI-9484 includes a 1U rack mountable server, an SI-9483-1 demodulator, and an ECL output driver card. The demodulator card processes a variety of high-bandwidth signal formats and provides parallel-decoded output symbols or soft decision data for channel processing. The software includes the demodulation algorithms and a graphical user interface (GUI). The demodulation algorithms are defined by the software executables for the card’s FPGA and general-purpose digital signal processing (DSP) ICs. New algorithms can be developed at the factory and new software executables delivered for field upgrades. The graphical user interface utilizes a client/server paradigm that can be accessed from the host or a remote computer using a standard web browser (Netscape® Navigator or Microsoft® Internet Explorer).

The digital PCM demodulator supports a wide range of modulation formats and symbol rates. The demodulator daughtercard supports signal bandwidths up to 70 MHz by directly converting the 140 MHz IF input signal to a 10-bit digital representation by processing the first alias of the 186.67 MHz ADC clock. Automatic or manual gain control at the input allows the unit to accept signal levels between –30 dBm and -5 dBm. With the input filter bypassed, the SI-9484-1 can also demodulate center input frequencies of 70 MHz with some performance degradation at higher symbol rates.

SI-9484-1 Highlights

• Low-cost, high-performance, PC-based demodulator in a rack mount PC server
• Demodulates:
  • 2-, 3- & 4-level FSK
  • BPSK, QPSK, 8PSK
  • Staggered QPSK
  • 16-, 32- & 64-level QAM
• Processes 1 to 42 Mbaud symbol rates
• 140 MHz IF input, 70 MHz signal bandwidth or unfiltered 70 MHz input
• Adjustable feed forward and decision feedback equalizers
• Field upgradeable with new FPGA/DSP algorithms
• ECL outputs provided for connection to legacy demultiplexers
• Client/server-based graphical user interface for configuration, status, and analysis
  • Multi-platform (Microsoft Windows® and Red Hat® Linux®) operating system
  • support
  • Control from host or remote computer using web browser interface
  • Real-time constellation, equalizer, and IF spectrum displays
• 10-bit analog to digital converter operating at 186.67 MSPS
• Automatic and manual fine tuning
• Automatic and user selectable baseband filters

DRS-SS APR. Export of DRS SIGNAL SOLUTIONS, INC. products is subject to U.S. export controls. Licenses may be required. This material provides up-to-date general information on product performance and use. It is not contractual in nature, nor does it provide warranty of any kind. Information is subject to change at any time. Copyright © DRS SIGNAL SOLUTIONS, INC. 2004. All Rights Reserved.