Interleaved frequency division multiple access with multiple antennas and block spreading for mobile broadband communications

... (GMSK) and quaternary phase shift keying (QPSK) Sophisticated multiple access technology like frequency division multiple access (FDMA), time division multiple access (TDMA) and code division multiple ... BS Block Spreading CDD Cyclic Delay Diversity CDMA Code Division Multiple Access DFT Discrete Fourier Transform FDE Frequency Domain Equalizer FDMA Frequency Division Multiple Access FEC Forward ... study and propose enhancements to improve the performance of interleaved frequency division multiple access (IFDMA) in the uplink transmission of mobile broadband system Our theoretical performance...

Thuyết trình Orthogonal Frequency Division Multiple Access in WiMAX and LTE A Comparison

... choosing OFDMA such as multipath handling capability, scalability of operation in different bandwidths, the ability to handle different data rates, and the ability to easily combine with multiple ... antenna techniques Nhóm - The focus of this article is on the comparative use of OFDMA in LTE and WiMAX systems USE OF OFDMA IN WIMAX AND LTE Nhóm FRAME STRUCTURE USE OF OFDMA IN WIMAX AND LTE ... INTRODUCTION USE OF OFDMA IN WIMAX AND LTE NETWORK ENTRY STEPS IN WIMAX AND LTE PERFORMANCE BOUNDS FOR SYNCHRONIZATION AND CHANNEL ESTIMATION EVOLUTION OF WIMAX AND LTE Nhóm CONCLUSION INTRODUCTION...

Tiểu luận Orthogonal Frequency Division Multiple Access in WiMAX and LTE A Comparison

... rộng OFDMA, LTE tiến bước xa thực bước đồng h a ban đầu không phụ thuộc băng thông Evolution of WiMax and LTE Như đề cập trước đó, WiMax LTE ứng viên cao th a mãn yêu cầu ITU IMT-Advanced cho ... đóng vai trò quan trọng l a chọn hệ thông wireless 4G nhà khai thác mạng Như đề cập trước đó, hầu hết nhà khai thác mạng ưu thích LTE WiMAX Các triển khai WiMAX nay, Sprint/Clearwire Hoa Kỳ lên ... lý đó, WiMax tiêu chuẩn h a trước LTE đó, cách tiếp cận WiMax bảo thủ so với LTE; có nhiều pilot hơn, có ký tự dành cho preamble Ngoài ra, tích hợp MIMO chuẩn WiMax không liền mạch LTE WiMax tiên...

Inter carrier interference suppression in orthogonal frequency division multiple access (OFDMA) systems uplink

... Challenges 1.3 Inter- Carrier Interference Suppression in OFDMA Uplink 1.4 Outline 12 Chapter Inter- Carrier Interference in OFDMA System Uplink 13 2.1 Frequency Asynchronism ... division multiple access QPSK quaternary phase shift keying FFT fast Fourier transform SDMA space division multiple access IBI inter- block interference SB subspace ICI inter- carrier interference ... IFFT inverse fast Fourier transform SIC successive interference cancellation ISI inter- symbol interference SIR signal-to -interference power ratio LMMSE linear minimum mean square error SINR signal-to -interference- plus-noise...

Báo cáo hóa học: "Research Article Block Interleaved Frequency Division " ppt

... with interleaved subcarrier allocation, as described in [13], also denoted as Interleaved Frequency Division Multiple Access (IFDMA) in the original paper [14] or Single-Carrier Frequency Division ... equidistantly frequency- separated blocks, each consisting of a few subcarriers, are allocated to each user A Discrete Fourier Transform (DFT) precoding step is performed on each Orthogonal FrequencyDivision ... each scenario In this paper, we present a novel multiple access scheme denoted as Block- Interleaved Frequency Division Multiple Access (B-IFDMA), which is intended to fulﬁll the above requirements...

Báo cáo hóa học: " Research Article On the Duality between MIMO Systems with Distributed Antennas and MIMO Systems with Colocated Antennas" pptx

... envisioned [11] In particular, we show that there is a strong duality between MIMO systems with colocated antennas (and spatially correlated links) and MIMO systems with distributed antennas (and ... the system and correlation model used throughout this paper are introduced in Section Then, the duality between MIMO systems with distributed antennas and MIMO systems with colocated antennas is ... as MIMO systems with correlated antennas In particular, a simple common framework for MIMO systems with colocated antennas and MIMO systems with distributed antennas was presented Based on the...

iec 60502-1 power cables with extruded insulation and their accessories for rated voltages

... 3,6 kV) Power cables with extruded insulation and their accessories for rated voltages from kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) Part 1: Cables for rated voltages of kV (Um = 1,2 kV) and kV ... POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES FROM kV (Um = 1,2 kV) UP TO 30 kV (Um = 36 kV) Part 1: Cables for rated voltages of kV (Um = 1,2 kV) and kV ... 15 POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES FROM kV (Um = 1,2 kV) UP TO 30 kV (Um = 36 kV) Part 1: Cables for rated voltages of kV (Um = 1,2 kV) and kV...

Báo cáo hóa học: " Research Article Resource Allocation with Adaptive Spread Spectrum OFDM Using 2D Spreading for Power Line Communications" doc

... throughput For these high channel attenuations, the optimal frequency spreading factor is around 64 Figure 10 gives results with both time and frequency spreadings, that is, with 2D spreading ... case Figures and give results with time spreading and L f = 1, and with frequency spreading and Lt = 1, respectively In these ﬁgures only 1D spreading is then performed J.-Y Baudais and M Crussi` ... Symbols spread onto pavement p (2D spreading) Kp Spread symbols L f ,p Lp Lt,p Distribution of the code chips within the time-frequency grid Figure 1: Schematic representation of the 2D- spreading...

Báo cáo sinh học: "Inequality of maximum a posteriori estimators with equivalent sire and animal models for threshold traits" pps

... exhibits a maximum at thereafter Hypothetical data set a heritability value of about 0.81 and decreases rapidly by Gianola and Foulley Table II shows the maximum a posteriori estimates of the parameters ... use of an animal model is currently the state of the art for genetic evaluation of breeding animals Basically, all the practical and theoretical reasons in favour of the use of an animal model ... that with a balanced random one-way classification and binary responses, the application of quasi-best linear unbiased prediction (QBLUP) and maximum a posteriori estimation (MAPE) leads to an...

báo cáo khoa học: "Uneventful octreotide LAR therapy throughout three pregnancies, with favorable delivery and anthropometric measures for each newborn: a case report" doc

... paroxysmal myopathy, and paranoiac thoughts of rape and sexual intimidation Her physical examination revealed pronounced facial acne and hirsutism, oily skin, moon face, buffalo hump, and classical Cushing’s ... Endocrinology, Diabetes and Metabolism, Rambam Health Campus and Rappaport Faculty of Medicine, Technion, Haifa, Israel Department of Pathology, G Gennimatas Athens General Hospital, Athens, Greece 3Department ... Metab 1997, 82:3771-3776 Page of doi:10.1186/1752-1947-5-386 Cite this article as: Naccache et al.: Uneventful octreotide LAR therapy throughout three pregnancies, with favorable delivery and anthropometric...

Báo cáo y học: "Group cognitive behavioural therapy for women with depression: pilot and feasibility study for a randomised controlled trial using mixed meth" pptx

... readability of the manual, Dr Alan Montgomery for help on the statistical aspects of this study, Dr Ali Heawood and Dr Lesley Wye for their qualitative advice, Alana Donaldson and Pei Tse our administrators ... project, analysed the quantitative data and jointly assisted in the interpretation of the quantitative and qualitative data and revised the article All authors read and approved the final version ... the control arm The course and manual were acceptable and appreciated by participants and facilitators delivered it faithfully and as intended Group attendance was adequate except for the booster...

Báo cáo khoa học: "Drotrecogin alfa (activated) should not be used in patients with severe sepsis and low risk for death" pdf

... children with severe sepsis, and in patients receiving lowdose heparin [3] In the Administration of Drotrecogin Alfa (Activated) in Early Stage Severe Sepsis (ADDRESS) study [1], Abraham and colleagues ... lung injury/acute respiratory distress syndrome Recommendation We concur with the ADDRESS authors DrotAA should not be used in patients with severe sepsis and low risk for death Competing interests ... Drotrecogin alfa (activated) in severe sepsis N Engl J Med 2006, 354:94-96 Friedrich JO: Drotrecogin alfa (activated) in severe sepsis N Engl J Med 2006, 354:94-96 LaRosa SP: Drotrecogin alfa (activated)...

Exchange bias characteristic in co pd n FEMN bi layered thin films with perpendicular anisotropy and the applications for spin valves in spintronics

... OPTIMIZATION OF PERPENDICULAR EXCHANGE BIAS 81 93 97 CHARACTERISTICS IN [Pd /Co] /FeMn THIN FILM SYSTEM 5.1 Introduction 97 iii 5.2 The effect of the seed layer on PEB [Pd /Co] /FeMn and FeMn/ [Co/ Pd] thin ... along the in- plane direction, and (e) a schematic diagram illustrating the spin configuration of Si/Ta(2)/ [Pd( 0.6) /Co( 0.23)] /FeMn( 11.6 nm)/Ta exchange biased thin films before and after annealing ... direction, and (d) a schematic diagram illustrating the spin configuration of Si/Ta(2)/ [Pd( 0.6) /Co( 0.23)] /FeMn( 11.6 nm)/Ta exchange biased thin films before and after annealing with different magnetic...

Schottky source drain transistor integrated with high k and metal gate for sub tenth nm technology

... SCHOTTKY SOURCE/ DRAIN TRANSISTOR INTEGRATED WITH HIGH- K AND METAL GATE FOR SUB- TENTH NM TECHNOLOGY LI RUI (B Sc., Univ of Science and Technology of China, CHINA) A THESIS SUBMITTED FOR THE ... integration of germanide Schottky source/ drain Ge channel MOSFET with high- k gate dielectric and metal gate for sub- tenth nm technology application The comprehensive knowledge on metal germanide properties ... source/ drain device with 19 Å gate oxide It is obvious that in a Schottky barrier MOSFET, the metallic source/ drain replace doped source/ drain and form a Schottky barrier with the semiconductor substrate...

Báo cáo hóa học: " Iterative Pilot-Layer Aided Channel Estimation with Emphasis on Interleave-Division Multiple Access Systems Hendrik Schoeneich and Peter Adam Hoeher" docx

... International Union of Radio Science (URSI ’05), New Delhi, India, October 2005 [12] H Schoeneich and P A Hoeher, “Semi-blind pilot-layer aided channel estimation with emphasis on interleave-division ... (1) training-based channel estimation (tb), (2) semiblind channel estimation (sb), and (3) blind channel estimation For tb, channel estimation is only based on the knowledge of the pilot layer, ... semiblind channel estimation (the channel estimation is based on the training and the soft information about the estimated data from the previous iteration) always outperforms trainingbased channel estimation...

Xem thêm