Maximum likelihood detection for differential unitary space-time modulation with carrier frequency offset
نویسندگان
چکیده
منابع مشابه
Differential unitary space-time modulation
We present a framework for differential modulation with multiple antennas across a continuously fading channel, where neither the transmitter nor the receiver knows the fading coefficients. The framework can be seen as a natural extension of standard differential phase shift keying (DPSK) commonly used in single-antenna unknown-channel systems. We show how our differential framework links the u...
متن کاملFast Multiple–Symbol Differential Detection for Unitary Space–Time Modulation
Unitary differential space–time modulation (UDSTM) where unitary matrix symbols are differentially encoded prior to transmission is an attractive solution for transmission over multiple–input multiple–output (MIMO) fading channels without requiring channel state information (CSI). In this work we investigate and optimize the application of tree–search algorithms to maximum–likelihood multiple–s...
متن کاملUnitary Differential Space-Time Modulation with Joint Modulation
We develop two new designs of unitary differential space-time modulation (DSTM) with low decoding complexity. Their decoder can be separated into a few parallel decoders, each of which has a decoding search space of less than N if the DSTM codebook contains N codewords. Both designs are based on the concept of joint modulation, which means that several information symbols are jointly modulated,...
متن کاملMultiple Symbol Differential Detection of MPSK which is Invariant to Frequency Offset using Maximum-likelihood detection
It is well known that classical differential detection of MPSK signals, wherein the information is encoded as the first order phase difference, is a simple and robust form of communication in environments not subject to frequency variation. For channels that introduce into the carrier a random frequency shift, eg., those associated with moving vehicles, classical differential detection as above...
متن کاملBlind Estimation of Carrier Frequency Offset for OFDM Systems using Maximum Likelihood Technique
vi LIST OF FIGURES viii ABBREVIATIONS ix Chapter-1: INTRODUCTION 1 1.1 OVERVIEW 1 1.2 LITERATURE SURVEY 3 1.3 MOTIVATION 4 1.4 STATEMENT OF PROBLEM 5 1.5 THESIS ORGANIZATION 6 Chapter-2: ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 7 2.1 OVERVIEW OF OFDM SYSTEM 7 2.2 EFFECTS OF FREQUENCY SYNCHRONIZATION ERRORS IN OFDM 12 SYSTEM 2.3 OFDM MERITS, DEMERITS & APPLICATIONS 16 Chapter-3: ANALYSIS OF IN...
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: IEEE Transactions on Communications
سال: 2008
ISSN: 0090-6778
DOI: 10.1109/tcomm.2008.060672