Circuits and Systems for Future Generations of Wireless by Aleksandar Tasic, Wouter A. Serdijn, Gianluca Setti

By Aleksandar Tasic, Wouter A. Serdijn, Gianluca Setti

The explosive call for in wireless-capable units, particularly with the proliferation of a number of criteria, shows an excellent chance for adoption of instant know-how at a mass-market point. The communique units of either this day and the long run may have not just to permit for numerous purposes, helping the move of characters, audio, snap shots, and video info, yet they'll even have to keep up reference to many different units instead of with a unmarried base station, in various environments. furthermore, to supply a variety of prone from diversified instant verbal exchange criteria with greater capacities and better data-rates, totally built-in and multifunctional instant units might be required.

Multifunctional circuits and platforms will be made ecocnomic via a wide scale of integration, removal of exterior elements, relief of silicon sector, and huge reuse of assets. Integration of (Bi)CMOS transceiver RF front-end and analog baseband circuits with computing CMOS circuits at the similar silicon chip additional reduces expenditures of multifunctional cellular devices.

However, as batteries proceed to figure out the lifetime and dimension of cellular gear, additional extension of services of wearable and instant units will count seriously at the built-in circuits and structures solutions.

The call for for multifunctional and multi-mode wireless-capable units is followed by way of many major demanding situations at approach, circuit, and know-how levels.

In Circuits and platforms for destiny Generations of instant Communications circuit and process ideas for a number of communique criteria and destiny generations of instant communications are mentioned.

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For the third point, the LNA interference filtering has to be realized without degrading receiver linearity. In addition, even when using a filtering LNA, the mixer linearity must still be optimized (Fig. 9). 1 Selective and Reconfigurable LNA From a general point of view, the voltage gain of the LNA is the product of the input device transconductance times the load impedance. To achieve maximum results both the input transconductance and the load impedance should be made selective and programmable.

Sjoland, “Improved Switched Tuning of Differential CMOS VCOs”, IEEE Transactions on Circuits and Systems II, May, 2002, pp. 352–355. 21. B. Razavi, RF Microelectronics, Prentice-Hall, Upper Saddle River, NJ, 1998. 22. I. Galton, “Granular Quantization in a Class of Delta-Sigma Modulators”, IEEE Trans. On Information Theory, May, 1994, pp. 848–859. 23. M. R. Elliott, T. Montalvo, B. P. Jeffries, F. Murden, J. Strange, A. Hill, S. Nandipaku, and J. , 2004, pp. 2190–2199. 24. A. W. Hietala, “A Quad-Band 8PSK/GMSK Polar Transceiver”, IEEE Journal of Solid-State Circuits, May, 2006, pp.

20 Simulated NF for the improved design L. Baldini et al. 3 Reconfigurable MB-OFDM UWB Receivers: Circuits and System Considerations 51 Fig. 4 Conclusion A reconfigurable narrowband receiver architecture tailored to MB-OFDM UWB receivers has been presented in this chapter. Linearity requirements for this system are predominantly set by narrowband out-of-band interferers (WLAN, cellular, etc). The proposed architecture is more resilient to these interferers compared to broadband architectures commonly used in UWB systems.

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