Prospective Performance of LEO Satellite Systems Employing Spread-Spectrum Techniques
スポンサーリンク
概要
- 論文の詳細を見る
In this paper, we discuss on two important issues through the realization of global personal communication networks with low earth orbital (LEO) satellites. The first issue is the selection of an effective multiple access scheme which can utilize the limited spectrum allocated to these systems. In this way, we focus on the schemes based on spread spectrum techniques and explain their unique characteristics. The other issue is partitioning of footprint of satellites into smaller cells in order to improve the capacity of the system. This latter issue has been considered in satellite systems of other orbit altitudes such as geostationary orbit and also in terrestrial cellular systems, and recently, in the proposals of LEO satellite systems it has been explained as an essential requirement. We explain the issue when spread spectrum is used and discussed on the factors which should be considered in the case of LEO satellite systems in order to expect similar capacity improvement.
- 一般社団法人電子情報通信学会の論文
- 1997-06-20
著者
-
Ogawa Akira
Department Of Applied Chemistry Graduate School Of Engineering The University Of Tokyo
-
Ogawa Akira
Department Of Information Electronics Nagoya University
-
Jamalipour Abbas
Department of Information Electronics, Nagoya University
-
Jamalipour Abbas
Department Of Information Electronics Nagoya University
関連論文
- Direct Relief of Levodopa-Induced Dyskinesia by Stimulation in the Area Above the Subthalamic Nucleus in a Patient With Parkinson's Disease : Case Report
- Castleman's Disease of the Retroperitoneum : With Special Reference to IgG4-Related Disorder
- PJ-193 What Levels of Plasma BNP are Related to Increased Risk of Onset of Cardiovascular Events in the General Population?(PJ033,Preventive Medicine/Epidemiology/Education 1 (H),Poster Session (Japanese),The 73rd Annual Scientific Meeting of The Japanese
- OJ-176 Prehypertension is an Indicator of High Prevalence of Albuminuria, and a Predictor of Cardiovascular Events in the General Population(OJ30,Hypertension, Clinical (H),Oral Presentation (Japanese),The 73rd Annual Scientific Meeting of The Japanese Ci
- OJ-091 Is Metabolic Syndrome a Useful Predictor for Cardiovascular Events and Death in the Rural Population?(OJ16,Metabolic Syndrome (H),Oral Presentation (Japanese),The 73rd Annual Scientific Meeting of The Japanese Circulation Society)
- X-ray Spectra from a Brass-target Plasma Triode
- Cyclin D1 Protein Overexpression in Extramedullary Plasmacytoma : A Clinicopathologic Study of 11 Cases
- Measurement of Cerium X-ray Spectra Using a Cerium Oxide Powder Filter and Enhanced K-edge Angiography
- X-ray Spectra from a Characteristic X-ray Generator with a Molybdenum Tube
- Clinicopathological Study of Unilateral Multiple Breast Cancer
- Atypical finding of brain Tc-99m-ECD SPECT imaging in herpes simplex encephalitis
- Hemorrhage and Abnormal Veins in Acoustic Neurinoma : MR Findings
- Angular dependence of x-ray spectra from a demountable x-ray tube with a copper target
- K-edge digital angiography using a flat panel detector with a pixel size of 50μm
- Accumulation of Negative Ions in Hollow-Type Electron Cyclotron Resonance CF_4 Plasma Column
- ガンマ線照射後器官培養された豚眼毛様体上皮におけるアポトーシス
- Ganglioneurocytoma : Distinctive variant of central neurocytoma
- Desmoplastic cerebral astrocytoma of infancy intermingling with atypical glial cells
- PJ-656 Albuminuria is an Independent Predictor for the Onset of Cardiovascular Events in the General Population(Kidney/Renal circulation-5, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- Malignant Intracranial Meningioma With Spinal Metastasis : Case Report
- Application of Fenestrated Aneurysm Clip for Incomplete Clamping of the Common Carotid Artery During Carotid Endarterectomy : Technical Note
- Choice of Posterior Subtemporal Transtentorial Approach for Tumor Resection in Deep Anteromedial Superior Cerebellum
- Rupture of a Concomitant Unruptured Cerebral Aneurysm Within 2 Weeks of Surgical Repair of a Ruptured Cerebral Aneurysm
- Lipomatous Meningioma With Concomitant Acute Subdural Hematoma
- Fusion of Magnetic Resonance Angiography and Magnetic Resonance Imaging for Surgical Planning for Meningioma
- Endarterectomy for Mild Cervical Carotid Artery Stenosis in Patients With Ischemic Stroke Events Refractory to Medical Treatment
- Brain Retraction Technique Using Gelatin Sponge in the Subtemporal Approach
- Treatment of Ruptured Spontaneous Saccular Aneurysm in the Central Artery of the Middle Cerebral Artery Using Bypass Surgery Combined With Trapping
- Improved Geometric Distortion in Coronal Diffusion-weighted and Diffusion Tensor Imaging Using a Whole-brain Isotropic-voxel Acquisition Technique at 3 Tesla
- Meningioma in the Posterior Fossa Without Dural Attachment : Case Report
- Complete Neck Clipping of Internal Carotid-Posterior Communicating Artery Aneurysms Using Bayonet-Shaped Aneurysm Clips : Technical Note
- Urgent Endarterectomy Using Pretreatment With Free Radical Scavenger, Edaravone, and Early Clamping of the Parent Arteries for Cervical Carotid Artery Stenosis With Crescendo Transient Ischemic Attacks Caused by Mobile Thrombus and Hemodynamic Cerebral Is
- Persistent Falcine Sinus Associated With Obstruction of the Superior Sagittal Sinus Caused by Meningioma : Case Report
- Trapping and Vascular Reconstruction for Ruptured Fusiform Aneurysm in the Proximal A_1 Segment of the Anterior Cerebral Artery : Case Report
- Stevens-Johnson Syndrome Associated With Intravenous Acetazolamide Administration for Evaluation of Cerebrovascular Reactivity : Case Report
- Recovery Process of Immediate Prolonged Posttraumatic Coma Following Severe Head Injury Without Mass Lesions
- Ruptured Vertebral Artery Dissecting Aneurysm Followed by Spontaneous Acute Occlusion and Early Recanalization
- Quantitative Analysis of Magnetic Resonance Imaging Susceptibility Artifacts Caused by Neurosurgical Biomaterials : Comparison of 0.5, 1.5, and 3.0 Tesla Magnetic Fields
- Soft-Decision Decoding of Low-Density Parity-Check Codes for Hard-Detected Optical Communication Signals
- Comparison of Multiple Access Schemes in Multibeam Non-GEO Satellite Communication Systems
- The Real-Time Parallel Video Decoder Considered on the Complexity and Delay of Error Correcting Decoding
- BER Analysis for Multi-Carrier DS CDMA with Multi-Rate Traffic (Special Section on Multi-dimensional Mobile Information Networks)
- Generation of Sets of Sequences Suitable for Multicode Transmission in Quasi-Synchronous CDMA Systems
- Autopsy findings of patients with urological neoplasms
- Error Correcting Capability of Constant Amplitude Coding for Orthogonal Multi-Code CDMA Systems (Special Section on Information Theory and Its Applications)
- A Constant Amplitude Coding for Orthogonal Multi-Code CDMA Systems (Special Section on Spread Spectrum Techniques and Applications)
- Non-coherent Reception of M-ary Spread-Spectrum Signals in the Presence of Carrier Frequency Offset
- The Role of Rho and Rho-Dependent Kinase in Serotonin-Induced Contraction Observed in Bovine Middle Cerebral Artery
- OJ-092 Predictive Value of Plasma B-type Natriuretic Peptide for Ischemic Stroke in a Community-based Male Population of Northern Japan(Cerebrovascular circulation / Stroke-1, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- Early Revascularization in a Patient With Perfusion Computed Tomography/Diffusion-Weighted Magnetic Resonance Imaging Mismatch Secondary to Acute Vertebral Artery Occlusion
- High-field MRI of the Central Nervous System : Current Approaches to Clinical and Microscopic Imaging
- Urothelial Cancer Metastasized into Mediastinal Benign Neurilemmonia: A Case Report
- Combining Time-resolved and Single-phase 3D Techniques in Contrast-enhanced Carotid MR Angiography
- Information and Signal Processing for Sensor Networks(Wide Band Systems)
- Trochlear and Abducens Nerve Neurinomas Accompanied by a Cerebellopontine Angle Meningioma : Case Report
- Energy-storable Dye-sensitized Solar Cells with Interdigitated Nafion/Polypyrrole-Pt Comb-like Electrodes
- Sonic Analysis for Detection of Cervical and Intracranial Vascular Disease
- Transient crossed cerebellar diaschisis secondary to cerebral hyperperfusion following carotid endarterectomy
- Immunohistochemical localization of protease-activated receptors in cerebral and testicular arterioles of rats : their dependence on arteriole size and organ-specificity
- Snare Technique of Vascular Transposition for Microvascular Decompression
- AlGaAs/GaAs Laser Diodes with GaAs Islands Active Regions on Si Grown by Droplet Epitaxy
- AlGaAs/GaAs Laser Diodes with GaAs Islands Active Regions on Si Substrates Grown by Droplet Epitaxy
- Characteristics of cerebral β amyloid deposition in four non-demented patients in their forties with a high apolipoprotein E ε4 allele frequency
- The immunophenotype of perivascular cells in the human brain
- The Effect of Acute Cold Exposure and Norepinephrine on Uncoupling Protein Gene Expression in Brown Adipose Tissue of Monosodium Glutamate-Obese Mice
- Effect of Tazarotene, an Acetylenic Retinoid, on Human Dermal Fibroblast
- K-ras Codon 12 Mutation and Horizontal Growth of Colorectal Cancer
- p53 Overexpression and K-ras Codon 12 Mutations in Submucosal Invasive Colorectal Cancer
- Histochemical Study on Enzymatic Activity of the Hair cells of the Vestibular Organs in Guinea Pigs, especially Histochemical Reaction in Fresh Non-frozen Cristae Ampullares and Maculae
- Serum C-Reactive Protein Levels and Death and Cardiovascular Events in Mild to Moderate Chronic Kidney Disease
- Minute Glioma Identified by 3.0 Tesla Magnetic Resonance Spectroscopy : Case Report
- The role of protease-activated receptors on the intracellular calcium ion dynamics of vascular smooth muscles, with special reference to cerebral arterioles
- X-ray Spectra from Weakly Ionized Linear Copper Plasma
- Adverse Effects of Intravenous Acetazolamide Administration for Evaluation of Cerebrovascular Reactivity Using Brain Perfusion Single-Photon Emission Computed Tomography in Patients With Major Cerebral Artery Steno-occlusive Diseases
- Synthesis of Fibronectin Related Peptides : N^α-Methyl Amino Acid-containing Peptides
- Transorbital-transpetrosol Penetrating Cerebellar Injury : Case Report
- Uplink and Downlink Communications Qualities in CDMA Cellular Systems Considering Effects of Traffic Distribution (Special Section on Spread Spectrum Techniques and Applications)
- Diffusion Tensor Imaging in Patients With Major Cerebral Artery Occlusive Disease
- Throughput Analysis of Spread-Slotted ALOHA in LEO Satellite Communication Systems with Nonuniform Traffic Distribution
- On the Spin-up Time and the Residue Time of the Turbulent Rotational Air Flows in the Special Forrns of the Cyclone Dust Collectors
- Prospective Performance of LEO Satellite Systems Employing Spread-Spectrum Techniques
- Theory of the Cut-size of a Rotary Flow Dust Collector
- ON THE SEPARATION CHARACTERISTICS AND THE FLOW PATTERNS IN THE RETURNED FLOW TYPE OF THE NORMAL AND ECCENTRIC CYCLONE DUST COLLECTORS
- Magnification K-Edge Angiography Utilizing 100-μm-Focus Tungsten Tube and Gadolinium-Based Contrast Media
- Enhanced Magnification Angiography Using 20-μm-Focus Tungsten Tube
- Characteristic X-ray Generator Utilizing Angle Dependence of Bremsstrahlung X-ray Distribution
- Ischemic Events Due to Intraoperative Microemboli Developing in the Cerebral Hemisphere Contralateral to Carotid Endarterectomy in a Patient With Preoperative Cerebral Hemodynamic Impairment : Case Report
- Improvement and Impairment in Cognitive Function After Carotid Endarterectomy : Comparison of Objective and Subjective Assessments
- Investigation of Energy-Dispersive X-ray Computed Tomography System with CdTe Scan Detector and Comparing-Differentiator and Its Application to Gadolinium K-Edge Imaging
- COLLECTION CHARACTERISTICS OF THE SPECIAL FORMS OF THE RETURNED FLOW TYPES OF THE CYCLONE DUST COLLECTORS
- ESTIMATION OF THE COLLECTION EFFICIENCIES OF THE THREE TYPES OF THE CYCLONE DUST COLLECTORS FROM THE STANDPOINT OF THE FLOW PATTERNS IN THE CYLINDRICAL CYCLONE DUST COLLECTORS
- DIFFUSION OF THE FINE SOLID PARTICLES IN THE TURBULENT ROTATIONAL AIR FLOW IN THE VORTEX CHAMBER
- On the Experimental Investigation for the Separation Characteristics of a Rotary Flow Dust Collector
- Plasma B-Type Natriuretic Peptide Is Useful for Cardiovascular Risk Assessment in Community-Based Diabetes Subjects
- Variations in Cerium X-ray Spectra and Enhanced K-Edge Angiography
- Choice of Posterior Subtemporal Transtentorial Approach for Tumor Resection in Deep Anteromedial Superior Cerebellum : Case Report
- Prospective Performance of LEO Satellite Systems Employing Spread-Spectrum Techniques
- Enhanced K-edge Angiography Utilizing Tantalum Plasma X-ray Generator in Conjunction with Gadolinium-Based Contrast Media
- X-ray Photon Counting Using 100 MHz Ready-Made Silicon P--Intrinsic--N X-ray Diode and Its Application to Energy-Dispersive Computed Tomography
- Factors Related to Tooth Loss Among Community-Dwelling Middle-aged and Elderly Japanese Men