By Vojkan Vidojkovic, J. van der Tang, Arjan Leeuwenburgh, Arthur H.M. van Roermund

ISBN-10: 1402065337

ISBN-13: 9781402065330

This booklet investigates options, merits, barriers, and prices linked to multi-standard operation of RF front-ends and their skill to conform to variable radio environments. subsequent, it highlights the optimization of RF front-ends to permit greatest functionality inside of a undeniable strength price range, whereas concentrating on complete integration. eventually, the publication investigates probabilities for low-voltage, low-power circuit topologies in CMOS expertise.

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Extra info for Adaptive Multi-Standard RF Front-Ends (Analog Circuits and Signal Processing)

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The only impact on a front-end architecture is that a complex signal must be provided to the DSP. This means that two ADCs must be used. IRRmax improvement at RF The amplitude spectrum Xrf (ω ) is presented in Fig. 11(a). The convolution between the signal Xi (ω ), which is located at the frequency −ωi and the signal Xlop (ω ) produces the signal Xip (ω ). The convolution between the signal Xw (ω ) which is located at the frequency ωw and Xlo (ω ) produces the signal Xwd (ω ). Therefore, in order to reduce the component Xip (ω ), the signals at the negative frequencies in the amplitude spectrum Xrf (ω ) have to be suppressed.

This means that two ADCs must be used. IRRmax improvement at RF The amplitude spectrum Xrf (ω ) is presented in Fig. 11(a). The convolution between the signal Xi (ω ), which is located at the frequency −ωi and the signal Xlop (ω ) produces the signal Xip (ω ). The convolution between the signal Xw (ω ) which is located at the frequency ωw and Xlo (ω ) produces the signal Xwd (ω ). Therefore, in order to reduce the component Xip (ω ), the signals at the negative frequencies in the amplitude spectrum Xrf (ω ) have to be suppressed.

The second is the large dynamic range of the received signal. In order to have an estimate for a required dynamic range that has to be handled by the ADC, the DECT system is taken as an example. The DECT standard specifies front-end sensitivity of Psens = −86 dBm [31] (see appendix A). Taking into account a margin of 4 dB, a receiver sensitivity of −90 dBm is set as a target. The level of the strongest out-of band interferer (Pmax,int ) is −13 dBm [31]. 1) DRfe = Pmax,int − Psens Hence, for the DECT system the DR is 77 dB.

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Adaptive Multi-Standard RF Front-Ends (Analog Circuits and Signal Processing) by Vojkan Vidojkovic, J. van der Tang, Arjan Leeuwenburgh, Arthur H.M. van Roermund


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