Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Design and Performance Evaluation of Digital Baseband Receiver at 60 GHz Band Based on FBMC and CP-OFDM with WOLA Techniques
Author: Design and Implementation of Digital Baseband Receiver for 60 GHz Wireless Communication
Author: Yen-Cheng KuanPublisher:
ISBN:
Category :
Languages : en
Pages : 74
Book Description
To support the increasing demand of various high data-rate wireless communications, the 7 GHz band at 57-64 GHz has been allocated by the FCC for unlicensed system applications. This decision results in the formations of several standards aiming to develop multi-gigabit wireless communication systems, e.g., IEEE 802.15.3c, IEEE 802.11ad, and WiGig, among many others. One of their common and ultimate goals is to expedite the realization of widespread integrated circuits supporting large data transfers over the air. Designing a digital baseband receiver for the 60 GHz communication system (802.15.3c/802.11ad) requires the following features: (1) a proper architecture to mitigate design challenges of the high-speed analog-to-digital converters (ADCs) that are required by the synchronizer of the receiver; and (2) an effective technique to decouple the interferences that result from adjacent channel estimation sequences (CESs) as well as degrade the equalizer performance of the receiver. To fulfill these requirements, this work realizes the following: (1) a fractional-sampling-rate (FSR) digital baseband receiver to relax the ADC sampling rate requirement through multi-rate signal processing techniques; and (2) a high-accuracy channel estimator to reconstruct interference-less CES responses for improving the BER performance of the equalizer. Compared with the prior arts, the 65 nm CMOS implementations of (1) and (2) demonstrate the feasibilities of reducing the required ADC sampling rate by 25%, and assisting the equalizer in achieving 170x BER reduction, respectively.
Design for Indoor Wireless Digital Baseband Receiver at 60 GHz Band and Timing-Error Resilient Circuit
Author: OFDM Baseband Receiver Design for Wireless Communications
Author: Tzi-Dar ChiuehPublisher: Wiley
ISBN: 0470822481
Category : Technology & Engineering
Languages : en
Pages : 352
Book Description
Orthogonal frequency-division multiplexing (OFDM) access schemes are becoming more prevalent among cellular and wireless broadband systems, accelerating the need for smaller, more energy efficient receiver solutions. Up to now the majority of OFDM texts have dealt with signal processing aspects. To address the current gap in OFDM integrated circuit (IC) instruction, Chiueh and Tsai have produced this timely text on baseband design. OFDM Baseband Receiver Design for Wireless Communications covers the gamut of OFDM technology, from theories and algorithms to architectures and circuits. Chiueh and Tsai give a concise yet comprehensive look at digital communications fundamentals before explaining modulation and signal processing algorithms in OFDM receivers. Moreover, the authors give detailed treatment of hardware issues -- from design methodology to physical IC implementation. Closes the gap between OFDM theory and implementation Enables the reader to transfer communication receiver concepts into hardware design wireless receivers with acceptable implementation loss achieve low-power designs Contains numerous figures to illustrate techniques Features concrete design examples of MC-CDMA systems and cognitive radio applications Presents theoretical discussions that focus on concepts rather than mathematical derivation Provides a much-needed single source of material from numerous papers Based on course materials for a class in digital communication IC design, this book is ideal for advanced undergraduate or post-graduate students from either VLSI design or signal processing backgrounds. New and experienced engineers in industry working on algorithms or hardware for wireless communications devices will also find this book to be a key reference.
Performance Evaluation of Fixed and Variable Zero Padding Length in Ultra-wideband Receiver Design Using MB-OFDM Based on ECMA-368 Standard
Author: Geetha VarnaPublisher:
ISBN: 9781321550450
Category : Orthogonal frequency division multiplexing
Languages : en
Pages : 56
Book Description
Traditional OFDM systems use Cyclic Prefix (CP) in front of an OFDM symbol to maintain orthogonality. Ultra Wide Band (UWB) systems use Multiband OFDM approach in implementing applications of Wireless Personal Area Network (WPAN). Federal Communications Commission (FCC) put some regulations on UWB to co-exist with other narrowband and spread spectrum users. MB-OFDM follows OFDM modulation scheme where CP is used but CP introduces a structure into the transmitter due to which the ripples are produced in Power Spectral Density (PSD). Because of this ripples, power back-off is required at the receiver which is as large as 1.5 dB. As an alternative to CP, Zero Padding (ZP) is used where a flat PSD is obtained which requires zero power back-off. Circular convolution in CP is a natural phenomenon but for ZP, Overlap and add method (OLA) is used to ensure circular convolution. The ZP length used for OLA method is fixed and equal to 32 samples according to ECMA-368. If timing synchronization estimation errors occur, fixed ZP length may cause Inter Symbol Interference (ISI). So, a variable ZP length is required to avoid ISI depending upon the current band. Hence, a Multi Band Timing Synchronization algorithm is proposed to achieve variable ZP length based on current band for OLA method. This method benefits large delay spread channels. Improvement in SNR is achieved at particular Bit Error Rate (BER) for large delay spread channels.
Special Design Topics in Digital Wideband Receivers
Author: James B. Y. TsuiPublisher: Artech House
ISBN: 160807031X
Category : Computers
Languages : en
Pages : 440
Book Description
Offering engineers a thorough examination of special, more advanced aspects of digital wideband receiver design, this practical book builds on fundamental resources on the topic, helping you gain a more comprehensive understanding of the subject. This in-depth volume presents a detailed look at a complete receiver design, including the encoder. Moreover, it discusses the detection of exotic signals and provides authoritative guidance on designing receivers used in electronic warfare. From frequency modulation and biphase shifting keys, to parameter encoders in electronic warfare receivers and the use of the simulation and probability density function to predict the false alarm parameter, this book focuses on critical topics and techniques that help you design digital wideband receivers for top performance. The authoritative reference is supported with over 310 illustrations and more than 180 equations.
SC-OFDM-FBMC Triple-Mode Baseband Receiver System for 60GHz Application
Author: Introduction to OFDM Receiver Design and Simulation
Author: Y.J. LiuPublisher: Artech House
ISBN: 1630817392
Category : Technology & Engineering
Languages : en
Pages : 273
Book Description
This practical book is an accessible introduction to Orthogonal frequency-division multiplexing (OFDM) receiver design, a technology that allows digitized data to be carried by multiple carriers. It offers a detailed simulation study of an OFDM algorithm for Wi-Fi and 4G cellular that can be used to understand other OFDM waveforms. Extensive simulation studies are included using the transmissionwaveform given by the IEEE 802.11 standard. Scrambler, error-correcting codes, interleaver and radio-wave propagation model are included. OFDM waveform characteristics, signal acquisition, synchronization issues, channel estimation and tracking, hard and soft decision decoding are all covered. Detailed derivations leading to the final formula for any algorithm are given, which allows the reader to clearly understand the approximations and conditions behind the formulas and apply them appropriately. The algorithms are selected not just for the best performance from simulation study but also for easy implementation. An example is a unique algorithm for signal acquisition using the principle of maximum likelihood detection.
Design and Performance Evaluation of 1 Giga Hertz Wideband Digital Receiver
Author: Kiranraj GeorgePublisher:
ISBN:
Category : Radio
Languages : en
Pages : 140
Book Description
The lack of a priori knowledge about the waveform of interest, the multitudes of signals the receiver might receive, and the noise energy that occupies the same portion of the frequency spectrum as the signal makes the design of a modern wideband receiver very challenging. Especially, the receiver must be able to detect a weak signal in the presence of a strong one, which requires a high two-signal instantaneous dynamic range (IDR). To fulfill this requirement, the receiver must detect genuine weak signals and avoid the detection of strong signals’ sidelobes and noise and spurs generated from the receiver system. The other major trend in modern receiver signals is the shift towards wider bandwidths. Analog wideband receiver designs can provide accommodation of the technology-stressing bandwidths, but come up to a cost of reduced flexibility. Digital approaches, alternatively, provide flexibility in receiver signal processing, but they are limited by analog-to-digital converter resolution and power consumption. In this dissertation, design and performance evaluation of a 1-GHz signal bandwidth digital receiver, which uses a Kaiser Window function and a compensation technique, is presented. The Kaiser Window reduces the spectral leakage by eliminating the discontinuities at the time window edges and the compensation uncovers the weak signal for extension of the two-signal IDR of the receiver. An exhaustive study of configuration of ADC, FFT, window function, and compensation for a maximum achievable two-signal IDR of the receiver is conducted. It is shown that using a 4-bit ADC and a 256-point FFT of 12-point kernel function, a maximum two-signal IDR of 9 dB is obtained. The IDR is extended to 14 dB by using the Kaiser window and to 18 dB by using the compensation. Furthermore, using a 4-bit ADC and an ideal 256-point FFT, a maximum two-signal IDR of 11 dB is obtained. The IDR is extended to 17 dB by using the Kaiser window and to 22 dB by using the compensation. A combination of both Kaiser window and compensation techniques extends the two-signal IDR of the receiver to 24 dB by using a 12-point kernel function FFT and 29 dB by using an ideal FFT. A novel hardware implementation of the Kaiser window, the compensation technique, and the receiver design is presented.
Digital Techniques for Wideband Receivers
Author: James Bao-yen TsuiPublisher: Artech House Publishers
ISBN:
Category : Computers
Languages : en
Pages : 552
Book Description
With the most comprehensive description available of digital processing applicable to wideband receivers, this book helps you better understand the requirements of wideband digital RF receivers, learn numerous solutions to receiver problems, and get an overview of future trends in receiver development.