Throughput and optimum parameters of FHMA system with multilevel FSK
نویسندگان
چکیده
Optimization for system parameters including the modulation order, diversity order and traffic density to maximize the throughput of FHMA system with multi-level FSK is performed. Theoretical limit on the throughput and optimal system parameters are derived. The derived results can be applied to the conventional synchronous fast FHMA system with MFSK modulation based on the equivalent characteristic in multiple access channel model between both systems.
منابع مشابه
Determining Optimum Modulation for Inter-Satellite Communications Systems
In the small satellite world, it is becoming increasingly popular to use a constellation of small satellites to do the work previously performed by one large satellite. Implicit in this scenario is the requirement for clusters of small satellites to communicate among themselves via an inter-satellite link (ISL). Traditionally, an ISL has taken the form of a time-division-multiple-access (TDMA) ...
متن کاملControlling Common-Mode Voltages in Multilevel Inverters
This paper proposes a novel method based on pulse width modulation techniques toreduce and control the common-mode voltage in three-phase multilevel inverters. Besides controllingthe common-mode voltage, this method is capable of controlling capacitors voltages and load currentswith low switching losses and harmonic contents. In fact, due to the existence of different pulsepatterns and the poss...
متن کاملOptimum Structures of a Cascaded Multilevel Inverter for Minimum Number of Power Electronic Devices
In this paper, several optimum structures of a cascaded multilevel inverter is proposed. This optimization is based on generation a constant number of output voltage levels by using minimum number of power switches or dc voltage sources or minimum amount of blocked voltage by power switches. In addition, the optimum structure for a constant number of dc voltage sources by using minimum number o...
متن کاملA Combinatorial Model of Interference in Frequency Hopping Schemes
In a frequency hopping multiple access (FHMA) system a set of users communicate simultaneously using frequency hopping sequences defined on the same set of frequency channels. A frequency hopping sequence specifies which channels to use as communication progresses. A set of frequency hopping sequences used in an FHMA is called a frequency hopping scheme (FHS). Much of the research on the perfor...
متن کاملEstimating regional heavy metal concentrations in rice by scaling up a field-scale heavy metal assessment model
The objective of this study was to determine the levels of heavy metals cadmium (Cd) and copper (Cu) in rice by upscaling a field-scale heavy metal assessment (FHMA) model from field to regional scale. The FHMA model was established on the basis of spectral parameters in combination with soil parameters by employing a generalized dynamic fuzzy neural network. The piecewise function and ordinary...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003