transmitter and receiver design for amplified lightwave systems

Báo cáo hóa học: " Research Article Efﬁcient Compensation of Transmitter and Receiver IQ Imbalance in OFDM Systems" pptx

Ngày tải lên : 21/06/2014, 08:20

... compensation scheme for transmitter and receiver IQ imbalance and channel distortion compensation The system uses a predistortion-based compensation scheme for transmitter IQ imbalance Both receiver IQ ... eﬀect of transmitter and receiver IQ imbalance can thus expected to be more severe Figure 5(d) once again shows the BER versus SNR performance for a system impaired with transmitter and receiver ... training-based compensation schemes for OFDM systems impaired with transmitter and receiver IQ imbalance The proposed schemes can decouple the compensation of the transmitter and receiver IQ imbalance from...

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Báo cáo hóa học: "Research Article Advanced Receiver Design for Quadrature OFDMA Systems" doc

Ngày tải lên : 21/06/2014, 23:20

... performance of QOFDMA systems with different receivers, including linear ZF and MMSE, DFE, and iterative (turbo) receiver In OFDMA, subcarriers are first grouped per Q successive subcarriers, and ... OFDMA and SC-FDMA systems, Figure shows the intuitionistic difference of the core baseband modules among three systems At the transmitter, each user’s data is first encoded, interleaved, and mapped ... In this section, we will present techniques for signal detection, including ZF and MMSE equalizers, DFE and turbo receiver, specially for Q-OFDMA systems 3.1 Low-Complexity Linear Detections...

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DSP algorithm and system design for UWB communication systems

Ngày tải lên : 04/10/2015, 17:05

... performance The sampling rate required for the receiver ADC is also greatly reduced 23 CHAPTER 3: SYSTEM MODEL & RECEIVER DESIGN SYSTEM MODEL & RECEIVER DESIGN The proposed system model and receiver ... 60 Figure 5.5 BER performance for CM1 61 Figure 5.6 BER performance for CM2 62 Figure 5.7 BER performance for CM3 62 Figure 5.8 BER performance for CM4 63 ... components for each type of the channel are enormous For CM3 and CM4, there are even more multipaths present and the dispersed channel length is also longer than that for CM1 and CM2 When doing performance...

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Iterative receiver design for MIMO OFDM systems via sequential monte carlo (SMC) techniques

Ngày tải lên : 08/11/2015, 17:16

... C [58] Therefore for all c ∈ C and all d ∈ C ⊥ , c ⋅ d = The rows of H form the basis for C ⊥ , thus for all c ∈ C , cH T = Therefore, encoding can be simply done in a straightforward manner ... of their ability to handle soft inputs and outputs [33-34] and hence leading to better performances over systems using hard decisions Iterative receivers have been employed for various roles such ... channel 15 Receiver design for OFDM is rather simple as the available channel bandwidth is divided into N C number of SCs As the bandwidth of each SC is smaller than the coherence bandwidth of...

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Báo cáo hóa học: "Research Article Digital Receiver Design for Transmitted Reference Ultra-Wideband Systems" pptx

Ngày tải lên : 21/06/2014, 23:20

... transceivers, such as stored-reference (SR) systems, ED systems, and TR systems The ED and the TR systems belong to the class of noncoherent receivers Although their performances are suboptimal due to the ... similar in the low and high SNR ranges But in the medium range, T(x) with P = outperforms T1 (x) for about 5% ∼ 10% For PFA = 10−3 and PFA = 10−5 , the performance diﬀerences for these test statistics ... Experimental and theoretical PD,1 performance comparison for T(x) with P = and T1 (x) 10 E p /N0 (dB) Figure 9: MSE performance for channel estimation with diﬀerent lengths MSE for δ estimation...

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Báo cáo hóa học: "Research Article Synchronization Algorithms and Receiver Structures for Multiuser Filter Bank Uplink Systems" ppt

Ngày tải lên : 21/06/2014, 23:20

... performance than the SCS-RX For NU = 4, the SCS-RX and the US-RX exhibit a rapid performance degradation only for ε f > 0.04 This is due to the multiple access interference that degrades performance ... practical curves, for all receivers the performance is close to the ideal curves Larger, although nonsigniﬁcantly high, penalties are seen for the 4-user case The estimators for the SCS-RX and the US-RX ... metrics in an iterative fashion and estimate the time and frequency oﬀsets for this new iteration In the following, we propose several synchronization metrics for the receivers structures herein...

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Báo cáo hóa học: " Research Article Analysis and Compensation of Transmitter and Receiver I/Q Imbalances in Space-Time Coded Multiantenna OFDM Systems" ppt

Ngày tải lên : 22/06/2014, 19:20

... system performance without lengthy data and system simulations, and therefore they give a valuable tool for the system and transceiver designers Furthermore, the impact of I/Q imbalances and noise ... xI and Im[x] = xQ Statistical expectation and complex conjugation are denoted by E[ · ] and ( · )∗ , respectively We also assume that the complex random signals and random quantities at hand, ... fLO , and {gTX , φTX } and {gRX , φRX } represent the amplitude and phase imbalances of the transmitter (TX) and the receiver (RX) quadrature mixing stages, respectively This is the standard...

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Báo cáo hóa học: " Spreading Sequence Design and Theoretical Limits for Quasisynchronous CDMA Systems" doc

Ngày tải lên : 23/06/2014, 00:20

... Sequence Design for Communications Applications, Research Studies Press (RSP), John Wiley & Sons, London, UK, 1996 [3] D Peng and P Z Fan, Sequence Design and Applications for CDMA Systems, P Z Fan and ... applications to areas such as ultrawide bandwidth (UWB) THCDMA radio systems, multiuser radar and sonar systems Spreading Sequence Design and Theoretical Limits for QS-CDMA [63] Besides, GO/GQO sequences ... Information and Systems, vol E86-D, no 9, pp 1513–1524, 2003 30 EURASIP Journal on Wireless Communications and Networking [28] L Hao and P Z Fan, “On the performance of synchronous DS-CDMA systems...

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quantitative organizational modeling and design for multi-agent systems

Ngày tải lên : 13/11/2014, 11:18

... Diﬀerent designs applied to the same problem will have diﬀerent performance characteristics, therefore it is important to understand and model the behavior of candidate designs In the multi-agent systems ... created for each sector in the environment, and serve as intermediaries for much of the local activity For example, they generate and distribute plans needed to scan for new targets, store and provide ... Lesser As the scale and scope of distributed and multi-agent systems grow, it becomes increasingly important to design and manage the participants’ interactions The potential for bottlenecks, intractably...

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Iterative receiver design for broadband wireless communication systems via expectation maximization (EM) based algorithms

Ngày tải lên : 12/09/2015, 08:19

... Electrical and Computer Engineering for their friendship and help Special thanks go to Cao Wei and “superman” Gao Feifei Finally, I would like to thank my family for their understanding and support ... 80 5.4 BER v.s SNR for different iterations of BI-GDFE and EM for SCCP 81 5.5 BER v.s number of iterations for BI-GDFE and EM for SCCP 82 5.6 The MSE performance of SCCP ... BER v.s SNR for different iterations of BI-GDFE and EM for MCCDMA 84 5.8 BER v.s number of iterations for BI-GDFE and EM for MC-CDMA 85 5.9 The MSE performance of...

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A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems

Ngày tải lên : 20/11/2012, 11:28

... OFDM systems and MIMO systems Since the thesis studies the channel estimation for OFDM systems and system capacity for MIMO-OFDM systems, this chapter briefly introduces the background of OFDM systems ... 2.10: The waveform of Gk ( w) 24 Fig 2.11: Equivalent transmitter for OFDM systems 25 Fig 2.12: Equivalent receiver for OFDM systems 25 Fig 2.13: CP for an OFDM symbol ... estimation for OFDM systems over time varying and frequency dispersive fading channels With the increasing number of mobile phone users and higher demands for wireless services, future communication systems...

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radio and receiver projects for the evil genius

Ngày tải lên : 17/03/2014, 17:58

... output for commercial free radio broadcasts 22 Radio Receiver Projects for the Evil Genius was created to inspire readers both young and old to build and enjoy radio and receiver projects, and perhaps ... one sideband and attenuate the other These experiments indicated that one sideband contained all the necessary information for voice transmission, and these discoveries paved the way for development ... subbands In addition, Novices are restricted to 25 W in the 222-225 MHz band and W in the 1270-1295 MHz subband MHz = CW, RTTY, data MCW, test, phone and image = CW, phone and image = CW and...

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Equipment Purchasing and Facility Design for School Nutrition Programs potx

Ngày tải lên : 23/03/2014, 23:20

... Introduction to Equipment and Facility Design for School Nutrition Programs CHAPTER ONE Understanding the Equipment and Design Industry Chapter One – Understanding the Equipment and Design Industry Chapter ... commercial, and industrial customers Services include representing the interests of its members and their customers, and providing information and services promoting efficient demand and supply growth and ... Equipment and Supplies magazine provides useful information for equipment dealers and distributors, those who design foodservice facilities, and those interested in equipment and supplies for multi-unit...

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Research and Training Strategies for Goat Production Systems in South Africa pptx

Ngày tải lên : 31/03/2014, 22:20

... Reconstruction and Development Programme (RDP) The desired outcome is the development of productive and sustainable farming systems for the arid and semi-arid lands of South Africa, and thereby ... systems should focus on the acquisition of land use rights for grazers and the establishment of locally managed and controlled land and water management systems (Winrock International, 1992) In ... management packages for housing, feeding and breeding Compare the performance of crossbred and village goats under minimal care Αvillage≅ systems and improved management systems Encourage adoption...

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Báo cáo khoa học: "User studies and the design of Natural Language Systems" doc

Ngày tải lên : 01/04/2014, 00:20

... relative to norms gathered for informal and written speech and the results are expressed at too general a level to be useful for system design It is not enough to know, for example, that there are ... of nip systems 1987 Presented to the 25th Annual Meeting of the Asso[SF77] ciation for Computational Linguistics [CM84] [aSBC86] [JTS*85] [Kra80] G Guida and G Mauri A formal basis for performance ... language access to information systems: an evaluation study of its acceptance by end users Information Systems, 5:297-318, 1980 [McK84] Kathleen R MeKeown Natural language for expert systems: comparisons...

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Báo cáo hóa học: " Research Article Joint Compensation of OFDM Frequency-Selective Transmitter and Receiver IQ Imbalance" docx

Ngày tải lên : 22/06/2014, 19:20

... [l]B(i−1) This formula demonstrates that a receiver structure can be designed that exactly compensates for the transmitter and receiver IQ imbalance and the channel eﬀect (i.e., zero-forcing (ZF) ... of a direct-conversion transmitter transmitter and receiver IQ imbalance have been proposed in [10] In [11], a compensation scheme for frequency-selective transmitter and receiver IQ imbalance ... at both transmitter and receiver ends, the BER loss is 0.25 dB When IQ imbalance is present only at receiver end, the BER loss is 0.83 dB and with IQ imbalance at both transmitter and receiver...

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Báo cáo hóa học: " Research Article Wideband Impulse Modulation and Receiver Algorithms for Multiuser Power Line Communications" doc

Ngày tải lên : 22/06/2014, 19:20

... alphabet [18], and it Andrea M Tonello (u,i) (u,i) ··· c0 T used to introduce code diversity and to randomize the eﬀect of the MAI Tf cL−1 Tg 2.2 Figure 2: Frame format for user u and code i carries ... obtain high performance and to keep the complexity at moderate levels FD receivers have recently attracted considerable attention both for equalization in single carrier systems [15] and in multicarrier ... This translates into performance losses and suggests some form of multiuser detection or interference cancellation Therefore, in this paper we focus on the receiver side and we propose a novel...

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Báo cáo hóa học: " Joint MIMO-OFDM and MAC Design for Broadband Multihop Ad Hoc Networks" pot

Ngày tải lên : 22/06/2014, 22:20

... the preamble is received correctly by the intended receiver, the receiver sets up an out-of-band busy tone and waits for the data packet The transmitter, upon sensing the busy tone, sends the ... application to broadband wireless networks, estimation and detection for scalable, adaptive, and robust communications and propagation studies He has published numerous journal and conference articles ... transmit busy tones Therefore, the overhead of busy tones is proportionally small Performance analysis and simulation results show much better performance than RI-BTMA and CSMA/CA The paper is...

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analysis of boundary conditions and concept design for port dong lam, thua thien-hue province, vietnam

Ngày tải lên : 03/10/2014, 13:13

... is to design a port with sufficient capacity to handle the predicted cargo flow and which offers acceptable conditions for the ships to enter and for the surroundings This means that wave and current ... nourish the mainland beaches and sandy barriers that form across estuary mouths and tidal inlets Mainland beaches and barriers are typically steep and narrow and are dominated by crossshore sediment ... 111 Figure 80: sand spit and land reclamation – coastal port 112 Figure 81: cross-section of sand spit 112 Figure 82: erosion profile for sandy beaches ...

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Robust identification and controller design for delay processes

Ngày tải lên : 14/09/2015, 11:53

... 4.6 Process output and input of relay experiment for Example 4.3 51 5.1 Process output and input of relay experiment for Example 5.1 64 5.2 Pulse response and input for Example 5.1 ... (Soderstrom and Mossberg, 2000) Many text books and book chapters have been published on identiﬁcation, for examples, Soderstrom and Stoica (1983), Ljung (1987), Unbehauen and Rao (1987), Sinha and Rao ... models (Astr¨m and Hagglund, 1995) and cannot describe highorder processes and non-minimum-phase systems Wang and Zhang (2001) took advantage of simplicity of the input of step tests and devised...

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