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The ALM* line is used to signal a warning condition. It remains asserted only during the time that the specified conditions occur. Due to the transient nature of the ALM* line, it is recommended to use the SRQ* to signal errors. The default module configuration specifies the ALM* to function as a locked line.

Table 1 contrasts the design exploration tradeoffs that can be achieved through top-down DSP design.

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Hardware tradeoffs should not require modification to the golden MATLAB source since these modifications are a downstream implementation decision. In doing so, the benefits of a top-down DSP design flow can be fully realized.

Wrap Up MATLAB provides an optimal design environment for the channelizer function of an SDR wideband receiver. The richness of the available MATLAB DSP functions, combined with the power of a high-level language construct such as loop,” allow for concise modeling of the channelizer function.

Companies are now providing a top-down DSP design flow that uses behavioral MATLAB as a golden source to quickly target an ASIC or FPGA. MATLAB offers both the easiest modeling environment and the fastest and most flexible path to hardware for channelized receivers.

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About the Author Tom Hill is a technical manager at AccelChip Inc. He holds a BSEE from Cleveland State University and can be reached at .

RN60E5111FB14_Vishay Dale_Through Hole Resistors

The U.S. companies are also very resourceful, and they put a lot of effort into innovation. Right now, in Taiwan and China, most companies are doing development, not research. So in the long run, the U.S. companies still have a lot of potential because through all these years they have built up a lot of intellectual-property reserves.

A much different perspective emerges, however, when global industry technology investment is viewed through the more long-term, strategic prism of electronics and computer industry R&D.

Think of R&D in the U.S. high-tech sector, and names like Xerox Palo Alto Research Center, MIT Lincoln Lab, AT&T Bell Labs and IBM's Thomas J. Watson Research Center come to mind. Today, Bell Labs, T.J. Watson and Xerox Parc are mere shadows of their former selves, downsized by the realities of global business and technology challenges that now put the highest premium not on long-term research but on short-term product goals. Research today is a nearly extinct species of scientific inquiry in the electronics and computer sectors, but development is thriving. And it is being carried out by a massive diaspora of funds, projects and people peppered across the globe.

The migration is not just about outsourcing for low labor rates,” George W. Wang, director of IBM's China Development Lab in Beijing, said recently, noting that IBM has had a long history of globalizing R&D. If it was just about low labor rates, we'd probably have R&D centers in places like Romania and the Philippines,” Wang observed.

Next the UCSD researchers will demonstrate that micron-sized SRRs can also detect absorption patterns in the terahertz range, enabling chip-sized SRRs to see through” clothing and baggage to identify weapons and explosives, or to guide an airplane through fog.

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