Optimizing performance of multiple access multi carrier multilevel frequency shift keying systems
Optimizing performance of multiple access multi carrier multilevel frequency shift keying systems
... Multi- carrier Multilevel Frequency Shift Keying (MC-MFSK) system is a form of multi- tone MFSK systems, and it transmits on multiple frequency carriers simultaneously The number of frequency- carriers ... OPTIMIZING PERFORMANCE OF MULTIPLE ACCESS MULTI- CARRIER MULTILEVEL FREQUENCY SHIFT KEYING SYSTEMS TAY HAN SIONG (B.Eng.(Hons.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING ... capacity of MC-MFSK systems with error probability constraint 12 Chapter Optimal Diversity Order of Multiple Access Multi- Carrier MFSK Systems 3.1 Introduction In MC-MFSK systems, the number of frequency- carriers...
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Exact modeling of multiple access interference, ber derivation and a method to improve the performance of UWB communication systems
... Niranjayan, A Nallanathan and B Kannan, Modeling of Multiple Access Interference and BER Derivation for TH and DS UWB Multiple Access Systems , IEEE Transactions on Wireless communications, Aug ... Schemes”, Proc of Joint UWBST and IWUWBS 2004, May 2004 [3] S Niranjayan, A Nallanathan and B Kannan, A New Analytical Method for Exact Bit Error Rate Computation of TH-PPM UWB Multiple Access Systems , ... Of PIMRC 2004, September 2004 [4] S Niranjayan, A Nallanathan and B Kannan, Exact Modeling of Multiple Access Interference and BER Derivation for TH-PPM UWB , WCNC 2005, Accepted for publication...
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Báo cáo hóa học: " On the EVM computation of arbitrary clipped multi-carrier signals" docx
... arbitrary magnitude clipping function for achieving more realistic results for practical uses Appendix A Proof of the EVM computation equation We define the energy of the clipped portion of the ... distortion due to clipping as long as it is negligible relative to the channel noise EVM computation In this section we present the main result Let f(|xn|) = f (r) be the energy of the clipped portion ... Proof See Appendix A □ Simulation results and discussion 4.1 The Gaussian approximation A common method for analyzing the EVM of an OFDM signal uses the central limit theorem (CLT) By invoking the...
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Báo cáo hóa học: " Research Article Performance of Multiple-Relay Cooperative Diversity Systems with Best Relay Selection over Rayleigh Fading Channels" pdf
... Error performance for the best- relay selection scheme over Rayleigh fading channels Figure 3: Outage performance for path the best- relay selection scheme over Rayleigh fading channels of the ... 25 30 Regular cooperative networks The best- relay selection scheme Figure 4: Comparison between the regular cooperative diversity and the best- relay selection scheme over Rayleigh fading channels ... 30 35 Regular cooperative networks The best- relay selection scheme Figure 5: Comparison between the regular cooperative diversity and the best- relay selection scheme over Rayleigh fading channels...
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Báo cáo hóa học: "System-Level Performance of Antenna Arrays in CDMA-Based Cellular Mobile Radio Systems Andreas Czylwik" pptx
... System-Level Performance of Antenna Arrays the downlink, the impact of intercell interference on overall system performance plays an important role in CDMAbased systems [5, 7] Thus, detailed investigations ... beamwidths of about 40◦ the optimum performance of omnidirectional antennas is achieved The importance of adopting sector antennas in circular antenna arrays has to be emphasized since because of the ... and indicates an extra gain of System-Level Performance of Antenna Arrays 1317 −30 −30 SIR (dB) −25 SIR (dB) −25 −35 −40 −35 10 12 14 16 Antenna spacing (cm) −40 10 15 20 25 30 Radius of antenna...
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Báo cáo hóa học: " Research Article Joint Multilevel Turbo Equalization and Continuous Phase Frequency Shift Keying" pot
... Rayleigh, and Proakis B channels, respectively, and the conclusion is stated at the last section THE DESIGN OF MULTILEVEL TURBO ENCODER USING CPFSK M-ary continuous phase frequency shift keying ... binary turbo encoder at every level of the multilevel turbo encoder, and there is a continuousphase encoder serially connected to the turbo encoder at the last level Based on Rimoldi’s model and ... video, and audio broadcasting CONCLUSION We have presented multilevel turbo codes scheme with CPFSK modulation, and joint multilevel turbo equalization scheme with CPFSK modulation in this paper...
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Báo cáo hóa học: " Cross-Layer Design of an Energy-Efficient Cluster Formation Algorithm with Carrier-Sensing Multiple Access for Wireless Sensor Networks" pdf
... June–July 2003 Cross-Layer Design of an Energy-Efficient Cluster Formation Algorithm [19] K Sohrabi, J Gao, V Ailawadhi, and G J Pottie, “Protocols for self-organization of a wireless sensor network,” ... Hawaii, USA, January 2000 [10] W B Heinzelman, A P Chandrakasan, and H Balakrishnan, An application-specific protocol architecture for wireless microsensor networks,” IEEE Transactions on Wireless ... phases of the LEACH B algorithm The start packet is transmitted using a value of power given by PTmax = α PRmin 4π fc d0 /c Dmax /d0 Mf , Gant (17) Cross-Layer Design of an Energy-Efficient Cluster Formation...
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Multi-Carrier Digital Communications - Theory and Applications of OFDM
... Polytechnic Institute and State University Blacksburg, Virginia Multi-Carrier Digital Communications: Theory and Applications of OFDM Ahmad R S Bahai and Burton R Saltzberg Principles of Digital Transmission: ... Digital Communications Theory and Applications of OFDM Chapter 1.1 Introduction to Digital Communications Background The physical layer of digital communications includes mapping of digital input ... Multi-Carrier Digital Communications Theory and Applications of OFDM Information Technology: Transmission, Processing, and Storage Series Editor: Jack Keil Wolf University of California...
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Optimization of design and operating parameters on the year round performance of a multi-stage evacuated solar desalination system using transient mathematical analysis
... performance and thermal characteristics of the system Description of the multi-stage evacuated solar desalination system The Multi-stage evacuated solar desalination system is a combination of ... Results and discussion There are many design and operating parameters which affect the performance characteristics and distillate yield of the multi-stage evacuated desalination system These parameters ... Conclusion A transient mathematical model was developed for the flat plate collector and the multi-stage evacuated solar desalination system to evaluate the optimum design configuration and system...
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Báo cáo hóa học: " Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light emitting diodes" potx
... Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light- emitting diodes Seokjae Lee†1, Jaryong Koo†1, Gunwoo Hyung†1, Donghwan Lim1, Donghyung ... the other devices due to a relatively narrow emissive region Conclusions In conclusion, the present study reports on the high efficiency blue PHOLEDs based on a carrier and triplet exciton confinement ... rate of 10 Å/s The deposition rates were controlled with a quartz crystal monitor, and the doping concentrations of the emitters were optimized After the organic and metal depositions, the devices...
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Báo cáo hóa học: " Research Article Iterative Fusion of Distributed Decisions over the Gaussian Multiple-Access Channel Using Concatenated BCH-LDGM Codes" potx
... investigated the performance of concatenated BCH-LDGM codes for iterative data fusion of distributed decisions over the Gaussian MAC The use of LDGM codes permits to efficiently exploit the intrinsic ... step further by analyzing the performance of concatenated BCH-LDGM codes for encoded data fusion over the Gaussian MAC Specifically, our contribution is twofold: on one hand, we design an iterative ... analyze the distribution of the number of errors per block at the output of the LDGM decoders To this end, let CDF(λ) denote the Cumulative Density Function of the number of errors per LDGM-decoded...
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Báo cáo hóa học: " Research Article Partial Interference and Its Performance Impact on Wireless Multiple Access Networks" potx
... following contributions (1) After reviewing related work in Section 2, we formalize the notion of partial interference in Section and then demonstrate its significant performance impact on different ... expansion of the stability region by considering partial interference instead of binary ones as in Section More importantly, one should note the 16 EURASIP Journal on Wireless Communications and ... partial interference effects while analyzing the performance of wireless multiple access protocols Conclusion In this paper, we have introduced the notion of partial interference in wireless multiple...
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báo cáo hóa học:" Optimizing the thermoelectric performance of zigzag and chiral carbon nanotubes" pdf
... out the NEGF and NEMD calculations HJL participated in the design of the study and discussions of the theoretical results YWW, HYL, and LP participated in the implementation of the LAMMPS and ... method to study the thermoelectric properties of a serial of CNTs with different diameters and chiralities They are the zigzag (7,0), (8,0), (10,0), (11,0), (13,0), (14,0) and the chiral (4,2),(5,1), ... electric power, thermoelectric material is expected to be one of the promising candidates to meet the challenge of energy crisis The performance of a thermoelectric material is quantified by the dimensionless...
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Báo cáo hóa học: " Research Article Capacity of Time-Hopping PPM and PAM UWB Multiple Access Communications over Indoor Fading Channels" ppt
... (dB) 2 -PAM 4 -PAM 20 25 0.5 100 30 101 102 103 Number of user, SNR = 15 dB 2PPM 4PPM 8 -PAM 16 -PAM 8PPM 1 6PPM Figure 8: Capacity of a multiple access UWB system with PAM over a multipath fading ... 1 6PPM 3 2PPM 2PPM 4PPM 8PPM Figure 5: Relationship between distance and channel capacity of a UWB system with PPM over a multipath fading channel, L = 2, m = 0.65, and n = 8PPM 1 6PPM Figure 7: Capacity ... m=9 20 25 30 1 6PPM 3 2PPM 2PPM 4PPM 8PPM Figure 3: Capacity of a UWB system with PPM over a multipath fading channel with L = and m = 0.65 Figure 1: UWB multipath fading channel capacity with L...
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Báo cáo hóa học: " Research Article Effects of Carrier Frequency Offset, Timing Offset, and Channel Spread Factor on the Performance of Hexagonal Multicarrier Modulation Systems" doc
... on SINR for hexagonal multicarrier system channel spread factor on the performance of SINR in hexagonal multicarrier modulation systems are further discussed The exact SINR expression versus insufficient ... and channel spread factor on the performance of SINR in hexagonal multicarrier modulation systems are further discussed The exact SINR expression versus CFO, TO, and channel spread factor is derived ... that the power of the ISI and ICI caused by TO strongly depends on the channel spread factor of DD channel The maximum SINR timing decreases with the product τrms fd increasing, and the timing...
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Từ khóa: chuyên đề điện xoay chiều theo dạngNghiên cứu sự hình thành lớp bảo vệ và khả năng chống ăn mòn của thép bền thời tiết trong điều kiện khí hậu nhiệt đới việt namNghiên cứu tổ hợp chất chỉ điểm sinh học vWF, VCAM 1, MCP 1, d dimer trong chẩn đoán và tiên lượng nhồi máu não cấpBiện pháp quản lý hoạt động dạy hát xoan trong trường trung học cơ sở huyện lâm thao, phú thọGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWANNGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN SLIDEQuản lý hoạt động học tập của học sinh theo hướng phát triển kỹ năng học tập hợp tác tại các trường phổ thông dân tộc bán trú huyện ba chẽ, tỉnh quảng ninhPhát triển du lịch bền vững trên cơ sở bảo vệ môi trường tự nhiên vịnh hạ longNghiên cứu về mô hình thống kê học sâu và ứng dụng trong nhận dạng chữ viết tay hạn chếTìm hiểu công cụ đánh giá hệ thống đảm bảo an toàn hệ thống thông tinSở hữu ruộng đất và kinh tế nông nghiệp châu ôn (lạng sơn) nửa đầu thế kỷ XIXQuản lý nợ xấu tại Agribank chi nhánh huyện Phù Yên, tỉnh Sơn La (Luận văn thạc sĩ)Tranh tụng tại phiên tòa hình sự sơ thẩm theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn xét xử của các Tòa án quân sự Quân khu (Luận văn thạc sĩ)Trách nhiệm của người sử dụng lao động đối với lao động nữ theo pháp luật lao động Việt Nam từ thực tiễn các khu công nghiệp tại thành phố Hồ Chí Minh (Luận văn thạc sĩ)BÀI HOÀN CHỈNH TỔNG QUAN VỀ MẠNG XÃ HỘIĐổi mới quản lý tài chính trong hoạt động khoa học xã hội trường hợp viện hàn lâm khoa học xã hội việt namHIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀMMÔN TRUYỀN THÔNG MARKETING TÍCH HỢPQUẢN LÝ VÀ TÁI CHẾ NHỰA Ở HOA KỲ