Download e-book for kindle: Integrated Frequency Synthesis for Convergent Wireless by Jad G. Atallah

By Jad G. Atallah

ISBN-10: 1461414652

ISBN-13: 9781461414650

ISBN-10: 1461414660

ISBN-13: 9781461414667

This e-book describes the layout and implementation of an digital subsystem known as the frequency synthesizer, that is a crucial development block for any instant transceiver. The dialogue contains numerous new innovations for the layout of any such subsystem which come with the utilization modes of the instant machine, together with its aid for a number of modern instant criteria. This new viewpoint for designing this kind of difficult subsystem relies at the undeniable fact that optimizing the functionality of an entire procedure isn't consistently completed through optimizing the functionality of its construction blocks individually. This e-book presents “hands-on” examples of this type of co-design of optimized subsystems, which may make the imaginative and prescient of an always-best-connected state of affairs a reality.

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Our main focus is the implementation of the physical layer. However, as we delve more into this topic, it becomes also clear that one of the things to look for consists of the constraints and/or benefits that can be extracted by studying the upper layers. Some questions that we will be trying to answer are: given the Snifferbased architecture, how simplified can the Sniffer be in terms of physical specifications? What are the minimum functions that the Sniffer should include while still being able to perform its functionality?

2 Frequency Synthesizer Parameters 19 Other important behavioral specifications include the loaded output signal swing of the synthesizer. This is becoming quite important in practical implementations of wideband frequency synthesizers where the connecting buffers between the blocks and sub-systems should be at least as wideband as the core components such as the VCO. Otherwise, these connecting blocks will constitute the bottleneck in the implementation of the design. 2 Physical Specifications Physical specifications relate to issues such as power consumption and area.

5Њ rms PE 2Њ rms PE 10−2 10−3 10−4 12 14 16 18 20 22 24 SNR_bit (dB) Fig. 2 Integrated phase noise effect on the SNR requirements for a certain SER in QPSK and 64-QAM In zero and low IF transceivers, the synthesizer should output in-phase and quadrature phase reference signals (I/Q). Any imbalance between these two signals will degrade the received signal quality. As a result care should be taken in the creation of such a signal whether it comes from a polyphase filter, from a divider [15, 16] or directly from a quadrature VCO, although some compensation can be done in order to offset its effects [17–19].

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Integrated Frequency Synthesis for Convergent Wireless Solutions by Jad G. Atallah

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