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2011 | Buch

Communication Concepts: Circuit Designer Perspective Kapitel lesen Erstes Kapitel lesen

VLSI for Wireless Communication

verfasst von: Bosco Leung

Verlag: Springer US

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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Über dieses Buch

VLSI for Wireless Communication, Second Edition, an advanced level text book, takes a system approach starting with an overview of the most up to date wireless systems and the transceiver architecture available today. Wireless standards are first introduced (updated to include the most recent 3G/4G standards in the second edition), and translates from a wireless standard to the implementation of a transceiver. This system approach is particularly important as the level of integration in VLSI increases and coupling between system and component design becomes more intimate.

VLSI for Wireless Communication, Second Edition, illustrates designs with full design examples. Each chapter includes at least one complete design example that helps explain the architecture/circuits presented in this text. This book has close to 10 homework problems at the end of each chapter. A complete solutions manual is available on-line.

VLSI for Wireless Communication, Second Edition, is designed as a primary text book for upper-undergraduate level students and graduate level students concentrating on electrical engineering and computer science. Professional engineers and researchers working in wireless communications, circuit design and development will find this book valuable as well.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Communication Concepts: Circuit Designer Perspective
Abstract
What does GSM stand for? Why is the dynamic range in a digital enhanced cordless telecommunication receiver specified to be around 93 dB? What are multipath fading and Doppler shifts? How would the noise figure requirement of a low-noise amplifier change if I change my radio from one standard (DECT) to another (GSM)? Would Doppler shift be a problem in a standard such as PHS, and what circuit techniques do I have to address this problem?
Bosco Leung
Chapter 2. Receiver Architectures
Abstract
In Chapter 1 we focused on the blocks enclosed by dotted lines in Figure 1.1. They are the modulator, demodulator, and channel part of the communication system. We now redraw Figure 1.1 as Figure 2.1, with the receiver front end enclosed by dotted lines. In this chapter and the rest of the book, we emphasize this front end part of the communication system. Specifically, in this chapter we discuss the architecture of the front end as well as the filters inside, and in the rest of the book we concentrate on the design of active components inside the front end.
Bosco Leung
Chapter 3. Low Noise Amplifier
Abstract
Ostensibly, one key component of any receiver chain is the low-noise amplifier (LNA) coming off the antennas. Since the signal at that point is comparatively weak, good gain and noise performance are necessary.
Bosco Leung
Chapter 4. Active Mixer
Abstract
A mixer, or frequency converter, converts a signal from one frequency (typically ωrf) to another frequency (typically ωif) with a certain gain. This gain is called the conversion gain (G c ) and is defined to be the output signal amplitude at ωif divided by the input signal amplitude at ωrf. The power gain of a mixer, G, which has already been defined in Chapter 2, is related to this G
Bosco Leung
Chapter 5. Passive Mixer
Abstract
In this chapter we focus on passive mixers. One of the most obvious trade-offs between an active and a passive mixer is that of gain versus distortion. Active mixers provide gain and dissipate quiescent power. A Gilbert mixer is such an example that achieves gain through an active predriver (the V-I converter). This V-I converter is highly nonlinear and hence the Gilbert mixer distortion performance is worse. Passive mixers, on the other hand, require only dynamic power. They have a conversion gain of less than one (conversion loss) but can achieve excellent distortion performance.
Bosco Leung
Chapter 6. Analog-to-Digital Converters
Abstract
Traditionally in a receiver (as shown in Figure 2.1), upon mixing the input signal from RF to IF, subsequent demodulation can be performed in a couple of ways, depending on the kind of modulation used. In the case of DECT, since the input signal is phase modulated (GMSK for DE4CT), MSK demodulation for the digital encoded phase information should be performed. This can be done in a manner akin to demodulating a QPSK signal. There are three common ways to demodulate a QPSK signal: FM discriminator, IF detection, and baseband detection [9]. Each of these methods can be done entirely in the analog domain or by doing first an analog to digital (A/D) conversion at IF and then implementing these methods digitally using digital signal processing (DSP). In this sense the A/D converter becomes part of the demodulator. Using an A/D converter in a demodulator obviously is beneficial in terms of being able to integrate the post A/D conversion signal processing function on chip easily.
Bosco Leung
Chapter 7. Frequency Synthesizer: Phase/Frequency Processing Components
Abstract
As discussed in Chapter 2, a receiver front end consists of two blocks: a signal conditioning block and a signal controlling block. We have discussed the components needed for the signal conditioning block in the last few chapters: how the LNA amplifies the small RF input signals, the mixer mixes down the high-frequency RF input signal, and the A/D converter digitizes the mixed-down signal. In addition, we have assumed that someone is going to generate the LO (local oscillator) signal for the mixer.
Bosco Leung
Chapter 8. Frequency Synthesizer: Loop Filter and System Design
Abstract
In Chapter 7 we discussed the phase/frequency processing elements part of a frequency synthesizer. We noted that due to noise, mismatch in these components, spurs, and phase noise are generated. In this chapter we investigate how spurs and phase noise from individual components affect the spurs and phase noise of the complete synthesizer. To discuss these issues, we need to know the transfer functions from these components to the synthesizer output. These transfer functions depend on the loop filter of the synthesizer. Hence we start by discussing the loop filter. We analyze the loop filter from the view point of using it as a key to trade off spurs and phase noise while maintaining stability. Then we provide a design flow chart of the synthesizer and a detailed design example of a synthesizer that is used in a DECT receiver front end.
Bosco Leung
Chapter 9. Transmitter Architectures and Power Amplifier
Abstract
In Chapter 1 we focused on the blocks enclosed by dotted lines in Figure 1.1. They are the modulator, demodulator, and channel part of the communication system. We now redraw Figure 1.1 as Figure 9.1, with the transmitter back end enclosed by dotted lines.
Bosco Leung
Backmatter
Metadaten
Titel
VLSI for Wireless Communication
verfasst von
Bosco Leung
Copyright-Jahr
2011
Verlag
Springer US
Electronic ISBN
978-1-4614-0986-1
Print ISBN
978-1-4614-0985-4
DOI
https://doi.org/10.1007/978-1-4614-0986-1

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