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By Johan Janssens

CMOS mobile Receiver Front-Ends: From Specification to awareness offers with the layout of the obtain direction of a highly-integrated CMOS mobile transceiver for the GSM-1800 mobile process. the full layout trajectory is roofed, ranging from the records describing the traditional all the way down to the systematic improvement of CMOS receiver ICs that comply to the traditional. The layout of CMOS receivers is tackled in any respect abstraction degrees: from structure point, through circuit point, right down to the gadget point, and the opposite direction round. * varied receiver architectures are in comparison with admire to integratability, feasible functionality and required construction block requirements. * the necessities of the GSM-1800 general are mapped onto a collection of measurable standards for a highly-integrated low-IF receiver and allotted one of the assorted construction blocks. * a number of circuit topologies are offered that discover the most features of the obtain course. The dynamics of the user-friendly standards of those circuits are defined by way of the working aspect of the concerned units. at any place attainable, this is often performed utilizing analytical expressions. in line with those insights, unique sizing approaches are built to systematically measurement those RF circuits for a collection of standards. * The feasibility of assembly the necessities of modern-day high-end mobile criteria is tested in a mainstream submicron CMOS expertise via the advance of 2 highly-integrated GSM-1800 receivers. The theoretical center of the e-book discusses the elemental and extra complex facets of RF CMOS layout. It focuses particularly on allaspects of the layout of high-performance CMOS low-noise amplifiers.

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2 and p. 27], consisting of a sensitivity level and a corresponding maximum BER. Clearly, of the three different DCS-1800 flavors that exist the so-called class 3 flavor is the most sensitive; In a class 3 mobile station, one must be able to achieve a BER of 2% at signal powers as low as -102 dBm — which is less than 10–13 W! We will therefore focus on achieving the sensitivity of this class. Using Fig. 9 dB. 2 dB in a 200 kHz bandwidth. 3% for a Class 1/2 mobile station. 1, an SNR of about 7 dB must be guaranteed at the respective power levels.

However, it is unlikely that this solution can implement the selectivity that is required for heterodyne receivers. From the above it is clear that the heterodyne receiver architecture is not a good option regarding integratability, because it simply does not offer a path to full integration. Hence, the sense of making a full CMOS implementation using this architecture can be questioned; A CMOS implementation is only useful if it can provide a more compact and cheaper solution than the existing BiCMOS and bipolar implementations, without consuming too much extra power.

Every NRZ sequence can be viewed as a stream of pulses with a height of or coding for a one or a zero, respectively. 3 is to be used, these pulses are pre-shaped by a Gaussian filter, or in other words, convolved with a Gaussian pulse: where h(t) is given by with and B the –3 dB bandwidth of the Gaussian filter. As a consequence, each frequency pulse is spread out over a the net instantaneous frequency in the same time span and contributes to window. The corresponding phase turn of is also spread out over 4Tb and occurs in steps of The net phase turn in a time span thus depends on 4 symbols.

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