منابع مشابه
Optimization of Control Parameters of Differential Evolution Technique for the Design of FIR Pulse-shaping Filter in QPSK Modulated System
Signal Processing in modern era, involves rigorous applications of various evolutionary algorithms such as Genetic Algorithm (GA), Particle Swarm Optimization (PSO) and Differential Evolution (DE) for the optimized design of aerodynamic shape, automated mirror, digital filter, computational intelligence etc. DE has been judged to be quite effective in designing different types of digital filter...
متن کاملSpace-Time Shaped Offset QPSK
This paper describes the use of orthogonal space-time block codes to overcome the performance and complexity difficulties associated with the use of Shaped Offset QPSK (SOQPSK) modulation, a ternary continuous phase modulation (CPM), in multiple-input multiple-output telemetry systems. The orthogonal space-time block code is applied to SOQPSK waveforms in the same way it would be applied to sym...
متن کاملTrellis-Coded Quadrature-Phase-Shift Keying (QPSK) With Variable Overlapped Raised-Cosine Pulse Shaping
This article introduces the notion of uncoded, partially overlapped, staggered quadrature raised-cosine modulation (SQORC-P) as well as that of a trellis-coded form that is implemented as a specific embodiment of the recently introduced crosscorrelated trellis-coded quadrature modulation (XTCQM). Consideration is given to the power spectral density (PSD) of the scheme over both linear and nonli...
متن کاملOn the Ungerboeck and Forney Observation Models for Offset QPSK
The Ungerboeck and Forney observation models for offset QPSK are derived for three different representations for OQPSK. The representations and their corresponding Ungerboeck observation models are different, but the trellises used by the maximum likelihood sequence estimators possess the same complexity. The Forney observation models are obtained in straight-forward way for the bit-based repre...
متن کاملEvaluation of Performance Metrics for QPSK Modulated Mobile Communication System Using Root Raised Cosine & Raised Cosine Pulse- Shaping Filters
Mobile communication system uses Quadrature Phase Shift Keying (QPSK) as one of the efficient digital modulation techniques. Pulse-shaping technique plays an important role in digital transmission. Root-Raised Cosine (RRC) and Raised Cosine (RC) filters are two important pulse-shaping filters used in mobile communication system. In this paper we have presented the study of some useful parameter...
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ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 2006
ISSN: 0090-6778
DOI: 10.1109/tcomm.2006.881349