By Vito Giannini, Jan Craninckx, Andrea Baschirotto
This is the 1st ebook to explain lots of the concerns interested by the transition from a unmarried regular to a software program Radio established instant terminal. The e-book is either a expertise instructional for rookies in addition to a place to begin for technical execs within the verbal exchange and IC layout who're coming near near the layout of a software program outlined Radio. a whole evaluation of the particular state-of-art for reconfigurable transceivers is given in detail.
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Additional resources for Baseband Analog Circuits for Software Defined Radio (Analog Circuits and Signal Processing)
From the SDR perspective, the zero-IF architecture seems to be the most promising approach. The conventional imperfections of this architecture can be easily compensated in the the digital domain. However, ﬂexibility, imposes tough challenges for the design of “clean” analog circuits for both RF and baseband sections: wideband/ﬂexible LNAs, power ampliﬁers, mixers, local oscillators, as well as ﬁlters and analog to digital converters are needed to build a polyvalent analog transceiver. Chapter 3 LINK BUDGET ANALYSIS IN THE SDR ANALOG BASEBAND SECTION n a direct conversion receiver, the analog baseband section is responsible for adjacent channel selectivity, anti-aliasing ﬁltering and dynamic range maximization.
In this case, the maximum and minimum gain settings are deﬁned as follows: Amax = σQ + SNRmin + M belowFno−bl − Smin ; Amin = FS − M belowFS − Smax . 11) where P is the signal power ampliﬁed by the receiver chain. Let us give an example. In the GSM standard, the channel of interest is anywhere between −102 dBm (Smin ) and −15 dBm (Smax ) for 87 dB of input dynamic range. Assuming the resolution of our ADC is nb = 14 bits and FS = 1 dBm, the quantization noise σQ is −85 dBm. For acceptable BER, the GSM standard requires 9 dB of SNRmin .
A discussion is carried on the optimal speciﬁcations aiming at the receiver power minimization. 1, an ADC at the antenna which digitizes different wireless bandwidths simultaneously is not realizable in the foreseeable future. A practical SDR receiver will need a wide-band RF front end that can be tuned to any carrier frequency and channel bandwidth at a time: the Zero-IF architecture is the most attractive solution to achieve this goal thanks to its relative simplicity which means less complexity for a wanted level of ﬂexibility.
Baseband Analog Circuits for Software Defined Radio (Analog Circuits and Signal Processing) by Vito Giannini, Jan Craninckx, Andrea Baschirotto