Download e-book for iPad: Architectures and Synthesizers for Ultra-low Power Fast by Emanuele Lopelli

By Emanuele Lopelli

ISBN-10: 9400701829

ISBN-13: 9789400701823

ISBN-10: 9400701837

ISBN-13: 9789400701830

Wireless sensor networks have the capability to develop into the 3rd instant revolution after instant voice networks within the 80s and instant information networks within the overdue 90s. regrettably, radio energy intake continues to be a massive bottleneck to the broad adoption of this know-how. various instructions were explored to lessen the radio intake, however the significant problem of the proposed suggestions is a discounted instant hyperlink robustness.

The fundamental objective of Architectures and Synthesizers for Ultra-low strength quickly Frequency-Hopping WSN Radios is to debate, intimately, present and new architectural and circuit point ideas for ultra-low energy, powerful, uni-directional and bi-directional radio links.

Architectures and Synthesizers for Ultra-low energy speedy Frequency-Hopping WSN Radios courses the reader throughout the many method, circuit and expertise trade-offs he'll be dealing with within the layout of communique platforms for instant sensor networks. eventually, this ebook, via various examples discovered in either complicated CMOS and bipolar applied sciences opens a brand new direction within the radio layout, exhibiting how radio hyperlink robustness could be assured by means of strategies that have been formerly solely utilized in radio platforms for center or excessive finish purposes like Bluetooth and army communications whereas nonetheless minimizing the general procedure energy consumption.

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Extra resources for Architectures and Synthesizers for Ultra-low Power Fast Frequency-Hopping WSN Radios

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The two-level acquisition algorithm performs quite well in a benign environment [34] (when no fading is present) but unfortunately the miss probability in a hostile environment can be as high as 20% for Eb /N0 = 7 dB. This forces the use of a much higher Eb /N0 during synchronization, which can require to transmit the synchronization pattern at a power level considerably higher than required. For this reason the two-step acquisition is not very suitable for an indoor wireless link. Nevertheless, for completeness, the comparison between all these three algorithms is carried out in this section.

9, increasing the data rate will make the average power consumption smaller and smaller. A limit is dictated by the idle power. 12). When the idle power is 1 µW, a data rate between 1 and 10 kbps is sufficient to not spoil the average power consumption for Pdiss ranging between 1 and 10 mW. In this way, in the worst condition (Pdiss = 10 mW) the average power consumption is determined in equal parts by the idle power and the power used during transmissions. When the idle power increases to 10 µW, then the data-rate can be relaxed down to around 1 kbps in all the cases.

This means that more nodes can be allocated in the same net. In [27] it is shown that the effective throughput of an FHSS network peaks at a certain number of nodes which is generally larger than in a DSSS system. For example, for the given number of wireless nodes and frequency bins available in the network described in [27], the FHSS network throughput peaks at around 13 nodes. On the other hand, these networks must be placed further away than in the case of a DSSS system. Still, on a single network an FHSS system is more robust than a DSSS system.

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Architectures and Synthesizers for Ultra-low Power Fast Frequency-Hopping WSN Radios by Emanuele Lopelli

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