multicarrier direct-sequence CDMA
Joint Impact of Frequency Synchronization Errors and Intermodulation Distortion on the Performance of Multicarrier DS-CDMA Systems
... of multicarrier systems is highly impaired by intercarrier interference (ICI) due to frequency synchronization errors at the receiver and by intermodulation distortion (IMD) introduced by a nonlinear amplifier ...
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Multirate Transmission in Frequency Hopping Multicarrier Direct Sequence Code Division Multiple Access Systems
... The BER performance of the constant-weight code based multirate FH/MC DS-CDMA systems using random FH schemes is shown in Fig.3 and Fig.4 in terms of the multipath Nakagami-m fading chan[r] ...
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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition
... in multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) systems using multiple base-station antenna arrays, where each antenna ar- ray employs multiple array ...
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Differential space time modulation schemes for smart antenna aided generalized multicarrier DS CDMA systems
... In [1], Alamouti proposed a simple transmit diversity scheme employing a Space-Time Block Code (STBC), which was capa- ble of achieving a substantial diversity gain by simultaneously transmitting two symbols with the aid ...
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Fractionally Spread Multicarrier CDMA: A Multiple Access Scheme for Various Wireless Channels
... In MC-CDMA communication systems [1]-[7], the total bandwidth available is divided into a number of subbands, where each subband may employ direct-sequence (DS) spread- ing and each subband signal is ...
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Design of a Baseband Transceiver for Multicarrier CDMA Communications
... setting the frequency spacing to the inverse of the symbol time, as in the case of OFDM [1, 2]. The received signals are transformed into the frequency domain and despreaded. In this way, signals scattered among many ...
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Generalized Multicarrier CDMA: Unification and Linear Equalization
... ciency. Multicarrier (MC) CDMA systems have been developed to capitalize on both OFDMA’s resilience to MUI and direct- sequence (DS) CDMA’s robustness against frequency selec- tivity to ...
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Design and Performance Analysis of an Adaptive Receiver for Multicarrier DS CDMA
... existing direct-sequence code-division multiple access (DS-CDMA) systems, the spread spectrum (SS) mod- ulation is exploited in mitigating various problems encoun- tered in different communication ...
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Multicarrier Block Spread CDMA for Broadband Cellular Downlink
... wideband direct-sequence (DS) code division multiple access (CDMA) transceivers suppress MUI statistically by restoring the orthogonality among users at the ...so-called multicarrier ...
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Performance of the Smart Antenna Aided Multicarrier DS CDMA and its Uplink
... Multi-Carrier Direct Sequence Code Division Multiple Access (MC DS-CDMA), which constitutes an attractive scheme [1],[2],[3],[4], based on a combination of DS-CDMA and ...
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Modeling and Simulation of CDMA Codes in Scilab
... 9600 = , the clock connected to the PN is set to be 128 times faster than the clock connected to the shift register containing the information bits. This is a typical modeling of DSSS, each information bit is en- coded ...
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PAPR Reduction Using PSO-GSA Tuned PTS Techniques in MC-CDMA System
... domain. Multicarrier systems such as Orthogonal Frequency Division Multiplexing (OFDM) and Multi Carrier Code Division Multiple Access (MC-CDMA) are considered to be the promising technologies for 4G ...
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Generalized Multicarrier DS CDMA Using Various Chip Waveforms
... In reference [1], [2] a generalized MC DS-CDMA scheme using rectangular chip waveforms has been investigated, when communicat- ing over frequency-selective Nakagami-m fading channels [3]. As ar- gued in [1], [2], ...
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Using chaotic sequence in direct sequence spread spectrum based on code division multiple access (DS CDMA)
... significant feature of the chaotic system are it’s sensitively dependence on its initial condition. It is properly illustrated by the finding of professor Flikkema, teaching meteorology at MIT. In 1997, Flikkema ...
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Genetic Algorithm Assisted Multiuser Detection for Asynchronous Multicarrier CDMA
... Finally, according to our fourth strategy S4, the vectors b (i+1) and b (i−1) are set to the same value as in the context of strategy S3 expressed in Equation 20 and 21. However, as in the context of the synchronous ...
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On Intercell Interference and Its Cancellation in Cellular Multicarrier CDMA Systems
... namely code division multiple access (CDMA), gives high flexibility, robustness, and frequency diversity gains [7]. Re- cently, the cellular aspects of MC-CDMA were investigated. In [8, 9], first analyses ...
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Review on Design and Implementation of DSSS-CDMA Transmitter using HDL with Raised Cosine Filter to Minimize ISI
... a CDMA communication system with DSSS technique in HDL has the advantages like the design is fully reconfigurable , The number of bits and PN sequence can be changed very easily and it is useful for both ...
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New Walsh-Like Non-Linear Phase Orthogonal Codes for Direct Sequence CDMA Communication
... basis sequence as the common basis sequence for the different orthogonal code ...basis sequence of the set, a number of unique orthogonal sets can be ...
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Multiple Access Technologies for Beyond 3G Wireless Cellular Systems
... and direct sequence code-division (DS-CDMA), and possible combinations of the two schemes are basically suitable for voice communications but not for burst data traffic, which would be the dominant ...
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Study and analysis the BER performance of linear multiuser detectors in non-Gaussian noise channel
... effect on user k of the other direct-sequence users is greatly reduced. Multiple-access interference (MAI) is a factor which limits the capacity and performance of DS-CDMA systems. MAI refers to the ...
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