From DSP-FPGA.com

Off-the-shelf data acquisition and control cards with an onboard DSP CPU often perform at only a fraction of their benchmark-based expectations. Increasing the number of channels, or increasing the sampling rate, begins to show signs of DSP CPU overload well before reaching full channel capacity.

Present-day market pressures are forcing data acquisition and control card providers to increase the number of channels on a data acquisition card, increase the sampling rate, and at the same time, reduce cost. Further, the actual function of the card is determined either during manufacturing or configured in-system. Sometimes designers expect the same card to perform different functions at different slots on the same system.

The use of a DSP CPU onboard, while providing the flexibility of hardware reuse across a wide range of applications, also becomes a bottleneck for board-level performance.

In this article, Shyam Chandra discusses a proposed architecture that would provide a low-cost, high-performance solution.

DSP CPU efficiency decreases with increased channel loading
As the number of channels increases, the load on the DSP engine also increases. This is due to the serial processing nature of current DSP CPUs, which are fetch/execute engines. In most applications, front-end preprocessing tasks, such as offset...


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Products & Services
Video Processor Boards
Video processor boards are used to process video, medical imaging, automated optical inspection, and other related activities. They can be fitted with between one and a thousand digital signal processing (DSP) units in order to increase the computing power of the board.
DSP Boards
Digital signal processor (DSP) computer boards are central to the implementation of high-performance industrial systems. They collect and process digital data from many sources, and distribute the results to other elements of the system.
Digital Signal Processors (DSP)
Digital signal processors (DSPs) are specialized microprocessors designed specifically for digital signal processing, usually in real-time. DSPs can also be used to perform general-purpose computations, but are not optimized for this function.
CPU Cards and Modules
CPU cards and modules are computer boards that contain the central processing unit (CPU) of a computer.
Audio Analyzers
Audio analyzers measure the noise and audio spectrum of output from an amplifier or a stereo.

Product Announcements
Signatec, Inc. - PMP1000 - Parallel Processing DSP Board
Combine any number of customer-specific data channels for up to 500 MB/s of continuous data input and achieve 72 GIPS of real-time processing performance using nine of TI's C6414 DSPs. The PMP1000,... (read more)
Signatec, Inc. - PDA16 Signal Waveform Digitizer
The PDA16 is a dual channel waveform capture board that provides a remarkable combination of high speed and high resolution sampling along with a very large memory capacity. Signal frequencies up to... (read more)
4DSP Inc. - Digitizer and Waveform Generator PMC/XMC
The AD450 is a high performance PMC/XMC digitizer module and waveform generator dedicated to digital signal processing applications with high bandwidth and MIMO requirements. The AD450 also offers... (read more)
Alacron, Inc. - FastImage 1303
FastImage1303 is an Autonomous Imaging System (AIS) that offers a balanced architecture of flexible I/O and processing power with computational and memory bandwidth, typically required by demanding,... (read more)
Nallatech, Inc. - BenADIC™: CompactPCI 20 Channel ADC Motherboard
Simultaneous 20-Channel, 14-bit ADC, operating up to 105MSPS with 250Mhz Bandwidth. The BenADIC provides high performance Analogue-to-Digital Data Conversion on a cPCI platform. High performance on... (read more)
 

Topics of Interest

DSP-FPGA.com (formely DSP Engineering magazine) is the engineer's resource for embedded digital signal processing. Our editorial content and product databases focus on DSP and FPGA hardware and...

Off-the-shelf data acquisition and control cards with an onboard DSP CPU often perform at only a fraction of their benchmark-based expectations. Increasing the number of channels, or increasing the...

High throughput and design flexibility have positioned FPGAs as a solid silicon solution over traditional DSP devices in high-performance DSP applications like mobile base stations, medical imaging,...

High throughput and design flexibility have positioned FPGAs as a solid silicon solution over traditional DSP devices in high-performance DSP applications like mobile base stations, medical imaging,...

the 545CK has powerful DSP extensions that push it past every licensable processor core ever benchmarked by Berkeley Design Technology (BDTI). Tom Halfhill, Microprocessor Report The Diamond 545CK...