asynchronous DS-CDMA system
Accurate BER Analysis of Asynchronous DS CDMA Systems in Ricean Channels
... an asynchronous DS-CDMA system using BPSK modulation is considered in the context of a Ricean fading ...the system using random spreading ...
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Exact BER Calculation of Asynchronous DS CDMA Systems Communicating over Hoyt Channels
... Fig. 2. BER versus the number of users K in an asynchronous DS- CDMA system using random spreading sequences and BPSK modulation communicating over Hoyt channels. The length of the random ...
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Ternary Zero Correlation Zone Sequence Sets for Asynchronous DS CDMA
... the DS-CDMA system shared by M asynchronous users ...an asynchronous DS-CDMA system over a frequency non-selective fading channel with AWGN noise estimated in [18] ...
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Accurate BER Analysis of QPSK Modulated Asynchronous DS CDMA Systems Communicating over Rayleigh Channels
... an asynchronous DS-CDMA system using I/Q modulation and random spreading sequences, when communicating over Rayleigh ...the system, which requires only a single ...
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Exact BER Performance of Asynchronous DS CDMA Systems using Quadriphase Spreading and QPSK Modulation over Rayleigh Channels
... Abstract— An accurate closed-form expression is derived for calculating the average BER in an asynchronous DS-CDMA system using random complex-valued spreading sequences for transmission over ...
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Adaptive Iterative Soft Input Soft Output Parallel Decision Feedback Detectors for Asynchronous Coded DS CDMA Systems
... We consider an asynchronous DS-CDMA system over the additive white Gaussian noise (AWGN) channel. It is assumed that the receiver has no knowledge of the short spreading codes used by the ...
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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 ...
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Space-Time Joint Interference Cancellation Using Fuzzy-Inference-Based Adaptive Filtering Techniques in Frequency-Selective Multipath Channels
... joint asynchronous DS-CDMA signals. The FLC system is employed to perform the non- linear mapping of the input variables into a scalar adapta- tion step-size μ of the LMS algorithm or a ...
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On the Performance of Band Limited Asynchronous DS CDMA over Nakagami m Channels
... of CDMA based communications [2], numerous valuable studies have been conducted [3]–[7] for the sake of finding various attractive chip ...a DS-CDMA system, when they occupy the same ...
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Accurate Bit Error Rate Calculation for Asynchronous Chaos-Based DS-CDMA over Multipath Channel
... A mathematical calculation of BER for single and mul- tiuser chaos communication system was recently presented by Lawrance et al. in [29, 30]. In their approach, they did not use neither the constant bit energy ...
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On the Uplink Performance of Asynchronous LAS CDMA
... based DS-CDMA system in a relatively low chip-rate sce- nario, provided that all users operate in a quasi-synchronous ...ditional DS-CDMA system, when L p is in excess of ...LAS- ...
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Blind Multiuser Detection by Kurtosis Maximization for Asynchronous Multirate DS/CDMA Systems
... VPG system and the MC ...VPG system and the MC system except the case of NFR = 10 dB for the MC sys- tem (Figure 4(d)), where performance gains associated with Algorithm 1 decrease with ...
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Bit Error Performance for Asynchronous Ds Cdma Systems Over Multipath Rayleigh Fading Channels (RESEARCH NOTE)
... of CDMA as an alternative to traditional frequency–division multiple − access (FDMA) and time–division multiple–access (TDMA) techniques in mobile communications ...In CDMA, multiple users transmit, often ...
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Accurate BER of MC DS CDMA over Rayleigh Fading Channels
... We consider K asynchronous MC-DS-CDMA users in the system having all the same number of subcarriers U and spreading factor L. The average power received from each user is also assumed to be ...
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Computationally Efficient Blind Code Synchronization for Asynchronous DS CDMA Systems with Adaptive Antenna Arrays
... proposed asynchronous DS- CDMA time-delay detector is developed that utilizes the con- cept of the multistage reduced-rank Wiener ...new DS-CDMA detector does not require the stringent ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... of asynchronous transmissions (eg: uplink in cellular networks), Gold codes have good cor- relation properties ...MC-CDMA system (using Walsh codes) in a down- link scenario and ...
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Performance Improvement of Wireless communication System of DS CDMA with Rake Receiver
... i.e. main component of signal. The spread code have to be selected with a very small autocorrelation value because for any non-zero time counterbalance that avoids crosstalk between fingers or sub receivers. It does not ...
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Slow Frequency Hopping Multicarrier DS CDMA for Transmission over Nakagami Multipath Fading Channels
... (SFH/MC DS-CDMA) is proposed and inves- tigated, which can be rendered compatible with the existing second-generation narrowband CDMA and third-generation wideband CDMA ...the system ...
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Analytical Bit Error Rate Performance of DS CDMA Ad Hoc Networks using Large Area Synchronous Spreading Sequences
... The family of large area synchronous (LAS) [1] spreading codes exhibits an interference free window (IFW), where the off-peak aperiodic auto-correlations and cross- correlations become zero [2]. These attractive ...
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Performance Enhancement of DS-CDMA System using Extended BPSK Modulation Scheme
... [3]. DS-CDMA system is a widely used communication system that faces multiple user access interference as a challenge which causes degradation in the system ...a DS- CDMA ...
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