adaptive-modulation based CDMA
Performance Evaluation of Adaptive Modulation Based MC CDMA System
... an adaptive modulation technique based on encoded M-QAM, assisted with channel prediction for the Rayleigh fading channel in ...in adaptive modulation. This degrades the adaptive ...
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A Burst by Burst Adaptive Joint Detection Based CDMA Speech Transceiver
... robust modulation mode, the 10.2kbps 4QAM/JD-CDMA scheme is sensitive to chan- nel errors and breaks down under hostile channel condi- tions, where the ...
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Adaptive Minimum Symbol Error Rate CDMA Linear Multiuser Detector for Pulse Amplitude Modulation
... An adaptive minimum symbol error rate (MSER) linear multiuser detector (MUD) is proposed for direct sequence code divi- sion multiple access (DS-CDMA) systems employing multilevel pulse- amplitude ...
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A Space Time Spreading Assisted Multicarrier DS CDMA System using OVSF Codes Employing Adaptive Mode Switching Thresholds and Adaptive Modulation
... The Concept of Space-Time Spreading (STS) assisted, Adap- tive Quadrature Amplitude Modulation (AQAM) aided MC DS-CDMA is introduced. The AQAM mode-switching thres- holds are determined using an on-line ...
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Joint Detection and Interference Cancellation Based Burst by Burst Adaptive CDMA Schemes
... TCM is a powerful forward error correction (FEC) scheme that combines the functions of coding and modulation. It is a bandwidth-efficient scheme that has been widely recognized as an excellent error-control ...
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Quadrature Amplitude Modulation: From Basics to Adaptive Trellis Coded, Turbo Equalised and Space Time Coded OFDM, CDMA and MC CDMA Systems
... proposed by Picchi and Prati [54]. Their “Stop-and-Go” algorithm constitutes a combination of the Decision-Directed algorithm [55] with Sato’s algorithm [46]. After 1991, a range of different solutions to the blind ...
273
Rake Receiver Detection of Adaptive Modulation Aided CDMA over Frequency Selective Channels
... throughput while maintaining the target average BER. The au- thors of this contribution recently proposed a set of SNR- dependent mode switching levels [25], which keeps the aver- age BER of AQAM constant, while ...
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Adaptive Beamforming and Adaptive Modulation Assisted Network Performance of Multiuser Detection Aided FDD and TDD CDMA Systems
... of adaptive anten- nas [3], adaptive modulation [15], and multiuser detection [15]–[17] while jointly optimizing the physical and network layers in both FDD and TDD ...is based on extensive ...
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Adaptive Modulation and Adaptive Antenna Array Assisted Network Performance of Multi User Detection Aided UTRA like FDD/CDMA Systems
... Geometrically Based Single-Bounce El- liptical Model (GBSBEM) of [14,15] with parameters chosen such that the multipath rays had one-third of the received power of the direct ...
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Adaptive modulation and rate coding multi carrier code division multiple access technique for 4G mobile communication systems
... with adaptive modulation rate technology for fourth generation mobile communications is analyzed in this ...paper. Adaptive modulation based BPSK, QPSK, M-ary PSK systems applied to ...
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Signal space based adaptive modulation for software radio
... [2]. Modulation scheme recognition by the signal envelope extraction method was described by Druckmann, Plotkin and Swamy ...crossing based modulation recogniser was proposed by Callaghan, Pery , and ...
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A Unified Exact BER Performance Analysis of Asynchronous DS CDMA Systems Using BPSK Modulation over Fading Channels
... Fig. 5. BER versus the number of users K in an asynchronous DS-CDMA system using random spreading sequences and BPSK modulation commu- nicating over Nakgami- m channels. The length of the random spreading ...
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Design of a CSK-CDMA Based Indoor Visible Light Communication Transceiver using Raspberry Pi and LabVIEW
... limited modulation bandwidth of Light Emitting Diode (LED), baseband modules, and intersymbol interference ...VLC based software-defined radio (SDR) is designed and implemented that make use of Color Shift ...
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Coded Modulation Assisted Genetic Algorithm Based Multiuser Detection for CDMA Systems
... In an effbrt to increase the system's performance with the aid of channel coding, but without increasing the required bandwidth, in this contribution we will investigate the performance [r] ...
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Space-Time Joint Interference Cancellation Using Fuzzy-Inference-Based Adaptive Filtering Techniques in Frequency-Selective Multipath Channels
... an adaptive robust MMSE array- receiver is proposed based on a fuzzy-logic controlled LMS or RLS algorithm for space-time joint asynchronous DS-CDMA ...erent adaptive LMS algorithms with the ...
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Adaptive constrained CM based multicarrier CDMA receivers in multipath fading channels
... have been examined in many literatures, e.g., [24-29]. However, the reduced-tap receivers for MC-CDMA sys- tems were only discussed in a few papers. To reduce the complexity of DS-CDMA system, the received ...
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Adaptive interference suppression for DS-CDMA systems based on interpolated FIR filters with adaptive interpolators in multipath channels
... rendered adaptive, is discussed and designed with both MMSE and MV design ...(RLS)-type adaptive algorithms are developed for the new structure based upon the MMSE and MV performance criteria with ...
20
New Approach for Network Modulation in Cooperative Communication
... Network modulation is a software mapping technology, is using to redefine the constellation of typical Quadrature Amplitude Modulation (QAM) scheme when a source transmits the data to multiple receivers ...
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Joint Adaptive Modulation and Adaptive MAC Protocols for Wireless Sensor Networks
... Adaptive modulation dynamically changes the data rate according to the channel condition. This normally varies the transmission duration to be less than the pre-allocated MAC transmission period. As ...
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NOVEL DIRECT TORQUE CONTROL BASED ON SPACE VECTOR MODULATION WITH ADAPTIVE STATOR FLUX OBSERVER FOR INDUCTION MOTORS
... Vector Modulation (SVM); the use of a duty-- ratio controller to introduce a modulation between active vectors chosen from the look-up table and the zero vectors; use of artificial intelligence ...
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