DIFFERENTIAL CODE SHIFT REFERENCE IMPULSE RADIO ULTRA-WIDEBAND TRANSCEIVER PDF Download
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Author: Bhargava Sahukar
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Bhargava Sahukar
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jet'aime D. Lowe
Publisher:
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Category :
Languages : en
Pages :
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Author: Khalid Aldubaikhy
Publisher:
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Category :
Languages : en
Pages :
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Author: Jet'aime D. Lowe
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Chen Wei
Publisher:
ISBN:
Category :
Languages : en
Pages : 274
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Author: David Christopher Laney
Publisher:
ISBN:
Category :
Languages : en
Pages : 326
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Author: Chen Wei
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 0
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Author: Ranjit Gharpurey
Publisher: Springer Science & Business Media
ISBN: 0387692789
Category : Technology & Engineering
Languages : en
Pages : 207
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Book Description
This book is a compilation of chapters on various aspects of Ultra Wideband. The book includes chapters on Ultra Wideband transceiver implementations, pulse-based systems and one on the implementation for the WiMedia/MBOFDM approach. Another chapter discusses the implementation of the physical layer baseband, including the ADC and post-ADC processing required in the UWB system. Future advances such as multiantenna UWB solutions are also discussed.
Author: Serhat Erküçük
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 218
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Book Description
Ultra wideband impulse radio (UWB-IR) is a promising technology that has been recently investigated for high-rate data communications and low-rate location and ranging systems. Despite its many advantages including low-cost circuitry, use of unlicensed spectrum and multipath resolving capabilities, the current implementation of UWB-IRs exhibits some problems. Firstly, the conventional UWB-IR modulation format, pulse position modulation (PPM), uses consecutive fixed pulse transmit locations that are largely affected by multipath-delayed pulses, which degrades the system performance. Secondly, increasing the data rate of the most commonly used binary PPM (BPPM) format is still an open research problem. Thirdly, periodic time-hopping (TH) codes used for multiple-access generate undesired peaks for the spectrum, which may cause increased interference levels for the systems co-existing in the same bandwidth. Considering above mentioned drawbacks of the current UWB-IRs, a new modulation format is proposed in this dissertation: Code Shift Keying (CSK) Impulse Modulation. M-ary CSK (MCSK), which can be employed by itself or combined with other UWB-IR modulations, achieves data transmission by selecting one of the M orthogonal user-specific TH codes, where these TH codes are used to randomize pulse transmit locations. While the randomized pulse transmit locations reduce the effect of multipath-delayed pulses on the system performance, the random selection of TH codes increases the effective TH code period and suppresses the undesired peaks in the spectrum. In this dissertation, CSK impulse modulation is studied in detail to quantify its performance improvement over the existing systems. Initially, MCSK is compared to M-ary PPM (MPPM) to show the advantage of randomizing pulse transmit locations over fixed locations. It is shown that MCSK can provide about 2dB performance gain over MPPM in a multipath channel. Secondly, MSCK is combined with BPPM (i.e., MCSK/BPPM) in order to increase the data rate of conventional TH-BPPM systems. It is shown that MCSK/BPPM can achieve improved system performance at increased data rate if system design parameters are properly selected. Finally, power spectral density (PSD) characteristics of MCSK based IRs are studied. It is shown that the random selection of TH codes improves the resulting PSD with respect to that of conventional UWB-IRs.
Author: Li Qiang
Publisher: LAP Lambert Academic Publishing
ISBN: 9783838368252
Category : Metal oxide semiconductors, Complementary
Languages : en
Pages : 192
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Book Description
The ultra-wideband (UWB) impulse-radio technology has unique features including high data-rate as well as low power consumption with ranging and localization capabilities. An UWB front-end, however, has to accommodate design challenges resulting from the exceptional wide bandwidth of several GHz. This book discusses the implementation issues of the UWB impulse-radio transceiver front-end, including the performance analysis of practical systems and the design of radio-frequency integrated circuits for transceiver front-ends. A general framework for performance evaluation of practical impulse radio system is proposed and demonstrated in scenarios of high-speed data communications as well as low-data-rate wireless body-area networks. An inductorless low- noise amplifier is designed with syncretic adoption of thermal noise canceling, capacitor peaking, and current reuse. The CMOS ransmit/receive switch design with highest reported bandwidth and power handling capability are discussed with customized transistor layout and triple-well resistive body- floating techniques. The prototypes have been demonstrated in state-of-the-art 130nm CMOS technology.
