Demodulation level selection in adaptive modulation
نویسندگان
چکیده
منابع مشابه
Digital Phase Modulation and Demodulation
Introduction 1 Background 1 Digital Communication Systems 2 Baseband Signal Representation 2 Line Codes 3 Passband Signal Representation 3 Constellation Diagrams 4 Generation of Coherent PSK Signals 4 Representation of BPSK 4 Generation of BPSK 5 Representation and Generation of QPSK 5 M-ary PSK 7 Demodulation of Coherent PSK Signals 8 Spectral Characteristics of PSK Signals 9 Error Performance...
متن کاملFundamentals of Modulation/Demodulation and Equalization
This tutorial paper presents fundamentals of recent modulation/demodulation and equalization technologies, such as OFDM (Orthogonal Frequency Division Multiplexing) scheme, SC-CP (Single Carrier block transmission with Cyclic Prefix) scheme and SC-ZP (Single Carrier block transmission with Zero Padding) scheme. By regarding those schemes as block transmission schemes, unified treatment of the s...
متن کاملAmplitude Modulation and Demodulation of Chaotic Signals
In this paper the notion of amplitude modulation of chaotic signals is introduced, similar to amplitude modulation of harmonic signal. Necessary conditions for modulation and demodulation of chaotic carrier are discussed. In particular, the type of chaotic carrier is discussed from the point of view of optimal demodulation. Demodulation accuracy estimates are also presented. Index terms – Chaot...
متن کاملSingle-carrier MIMO Transmission Using Adaptive Selection of Modulation Level and Spatial Multiplexing Order
あらまし 複数の送受信アンテナを用いる MIMO 伝送は,空間多重を行うことで最大スループットの向上, 空間ダイバーシチを行うことで受信信号対雑音電力比(SNR)の向上が可能となる.ところで,無線セル中央に 近いユーザは受信信号電力が高いから空間多重によりスループットを向上できるものの,無線セル端のユーザ は伝搬損失および他セルからの同一周波数干渉(CCI)が大きいため,空間多重を行ってもスループットの向上 が望めない.むしろセル端ユーザに対しては空間多重ではなく空間ダイバーシチを行って受信 SNR 向上を狙 うことでスループット低下を防ぐのが重要である.筆者らは以前シングルキャリア(SC)-MIMO 多重数適応可 変伝送を提案し,多重数を通信環境に応じて適応的に選択することで、その時どきの通信環境下で達成可能な 最大スループットを得られることを示した.多重数の選択には,循環遅延パイ...
متن کاملAdaptive Operator Selection at the Hyper-level
Whenever a new problem needs to be tackled, one needs to decide which of the many existing metaheuristics would be the most adequate one; but it is very difficult to know their performance a priori. And then, when a metaheuristic is chosen, there are still its parameters that need to be set by the user. This parameter setting is usually very problem-dependent, significantly affecting their perf...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Electronics Letters
سال: 1996
ISSN: 0013-5194
DOI: 10.1049/el:19961225