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futures. The Dow futures on the left are moving up as the crude futures on the right are moving down. Often there is an inverse relationship between fuel prices and equity prices.

In summary, this chapter presented an overview of UWB networking and related issues such as protocols and applications. The exciting potential of UWB is in the process of being understood and we envision the future to hold much more signi cant promise in better integration of UWB techniques in next generation wireless products and applications. ACKNOWLEDGMENTS The authors are pleased to acknowledge the discussions with Prathima Agrawal, Santosh Pandey, and Minal Mishra on this chapter.

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Despite its commonsense proposals, it ran into opposition One Progressive congressman denounced it as a path to a larger and even more powerful money trust that would completely dominate banking at the expense of the state banks The language of the act effectively prohibited branching within and between states It did, however, give the greater powers sought by McFadden to national banks Supporters, including Senator Carter Glass of Virginia, an author of the original Federal Reserve Act, applauded its passing However, all the original arguments concerned intrastate banking Like many bills before it, the McFadden Act was replete with vague and often confusing language, but its effects were well summarized by Charles W Carey of the American Bankers Association He exhorted his members to understand that the McFadden bill is the first effort of Congress to regulate branch banking As originally introduced, it would have accomplished that end .

Another major building block used in various transceivers is the power amplifier (PA) The term PA is probably one of the most liberally used in the industry Depending on the context, the system and the person, a PA can produce 5 dBm of output power or it can generate +40 dBm of output power! Further, the term output power itself should be elaborated on Sometimes the specified power level is for the saturated output power of the PA (the maximum possible output power of the PA, where increasing the input signal would generate no further increase in the output power) At other times, the specified output power level is for the 1-dB compression point of the PA Yet at other times, the specified power level is the maximum linear output power level of the PA.

rue scripting fun almost always requires additional COM objects to spice up the basic sets of commands. Finding, or even programming, such script extensions isn t hard you ll find numerous examples and full source code in this book. However, before you can use such extensions, you ll need to install them. This is where things can become tricky.

This latter specification requires further clarification as to what modulation type is being transmitted by the PA It should be evident that designing a PA may be quite challenging or rather simple depending on the context As discussed earlier, the PAR of a 80211 OFDM signal can be as large as 17 dB The transmitter blocks, in particular the PA, is therefore required to produce substantially larger peak signals than the average signal In order to maintain linearity, this typically requires a significant backoff from the 1-dB compression point of the PA (ie, the average transmit power is set to be several decibels below the P1dB point of the PA) This fact significantly reduces the maximum available efficiency obtainable from a 80211a/g PA.

Fortunately, in reality, the largest peaks of the OFDM signal occur very infrequently, and therefore a much smaller backoff produces reasonable system performance while increasing the attainable efficiency An example of a CMOS three-stage power amplifier implemented for 5GHz WLAN applications is shown in Figure 46 (Zargari et al, 2002) In order to maintain linearity, the PA is operated in class A mode All stages are cascoded and operate off of a 33-V supply The cascode devices allow for better stability, independent input and output matching, and a better device reliability in the presence of large signals present at the drains of the output devices Each stage is capacitively level shifted so that the optimal common-mode voltage for each stage can be properly set Capacitors are implemented using stacked metal 2 through metal 5 layers.