Download Baseband Analog Circuits for Software Defined Radio (Analog by Vito Giannini, Jan Craninckx, Andrea Baschirotto PDF

By Vito Giannini, Jan Craninckx, Andrea Baschirotto

This is the 1st publication to explain many of the concerns keen on the transition from a unmarried typical to a software program Radio dependent instant terminal. The publication is either a know-how instructional for newbies in addition to a kick off point for technical pros within the communique and IC layout who're forthcoming the layout of a software program outlined Radio. a whole assessment of the particular state-of-art for reconfigurable transceivers is given in detail.

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Additional info for Baseband Analog Circuits for Software Defined Radio (Analog Circuits and Signal Processing)

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This may limit the transceiver flexibility. Severe DC offset can be generated at the output of the mixer when the leakage from the LO is mixed with the LO signal itself. This could saturate the following stages and affect the signal detection process leading to I/Q mismatch and even-order distortion. Also, since the mixer output is a baseband signal, it can easily be corrupted by the large flicker noise of the mixer, especially when the incoming RF signal is weak. 3 Digital low-IF receivers The low IF receiver architecture combines the advantages (and drawbacks) of heterodyne receivers and direct conversion receivers.

This optimization is achieved by digital pre- and post-compensation of the baseband time-domain signal. Applying this compensation in the digital domain enables stable and easy implementation without the need for additional analog circuitry whereas applying it in the time domain enables compensation of any data stream, independent of its mode or modulation scheme thus ideally suited for multimode systems. Calibration is one of the keys to enable the realization of low-cost, highperformance SDR mobile terminal.

This typically involves calculations for gain, noise figure, filtering, Intermodulation products, and input 1dB compression (P1dB). In the following, we give a short analytical description for each one of these trade-offs. Furthermore, following the approach in Jussila and Halonen (2004) and Seo et al. (2003), we provide an estimation of the total power consumption and a way to minimize it. Only all-pole filters and Nyquist-rate ADC are discussed here. 2. As discussed in Maloberti (2007), if Fs is the ADC sampling frequency, possible spurs in the frequency interval [Fs /2 → (Fs − Fb )] are not critical as their images fold outside the band of interest.

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