synchronous DS-CDMA downlink
Non Coherent Code Acquisition in the Multiple Transmit/Multiple Receive Antenna Aided Single and Multi Carrier DS CDMA Downlink
... the DownLink (DL) of wireless systems exhibits an attractive technique of reducing the detrimental effects of time-variant multi-path fading envi- ronments, while maintaining an increased design flexibility ...
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Differentially Coherent Code Acquisition in the MIMO Aided Multi Carrier DS CDMA Downlink
... the downlink of wireless systems constitutes a powerful technique of reducing the detrimental effects of fading by achieving a substantial diversity ...inter-cell synchronous CDMA systems, the mobile ...
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Analysis of Serial Search Based Code Acquisition in Multiple Transmit Antenna Aided DS CDMA Downlink
... The classic serial search technique has been employed in scenarios, where the uncertainty region (or search window width) is quite wide and hence in the context of serial search the mean acquisition time is the vital ...
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Downlink Steered Space Time Spreading Assisted Generalised Multicarrier DS CDMA Using Sphere Packing Aided Multilevel Coding
... sided noise power spectral density. The remaining system parameters are outlined in Table II. Figure 2 shows that the performance of the system supporting K = 4 users is similar to that of the system serving a single ...
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Coherent and Differential Downlink Space Time Steering Aided Generalised Multicarrier DS CDMA
... We know from Equation (14) that MUI is inevitably im- posed, since the orthogonality of the F-domain spreading codes cannot be retained over frequency-selective fading chan- nels. However, the desired signal is not ...
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Initial and Post Initial Acquisition in the Serial Search Based Noncoherent Multiple Transmit/Receive Antenna Aided DS CDMA Downlink
... the downlink of wireless systems constitute an attractive technique of reducing the detrimental effects of time-variant multi-path fading environments ...inter-cell synchronous CDMA systems the ...
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Serial Search Based Initial Code Acquisition in the Multiple Transmit/Receive Antenna Aided Multi Carrier DS CDMA Downlink
... the downlink of wireless systems constitutes an attractive technique of reducing the detrimental effects of time-variant multi-path fading environments ...the downlink of wireless systems exhibits ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... a synchronous environment (eg: downlink in cellu- lar networks) while in the case of asynchronous transmissions (eg: uplink in cellular networks), Gold codes have good cor- relation properties ...
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Spectrally Efficient Four Dimensional M-ary QAM for Synchronous DS-CDMA
... of CDMA channels can be increased by using an M-ary modulation scheme, but with reduced power ...combine CDMA for synchronous users with four dimensional (4D) bandpass (BP) quadrature amplitude ...
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Differentially Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Assisted Multi Carrier DS CDMA Downlink
... the downlink of wireless systems exhibits an attractive technique of reducing the detrimental effects of time-variant multi-path fading environments ...(SC) CDMA and OFDM [4] have attracted research efforts ...
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Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS CDMA Downlink
... the downlink of wireless systems constitutes an attractive technique of reducing the detrimental effects of time-variant multi-path fading environments ...cell synchronous CDMA systems the mobile ...
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Slow Frequency Hopping Multicarrier DS CDMA for Transmission over Nakagami Multipath Fading Channels
... SFH/MC DS-CDMA system has a similar complexity to that of the corresponding conventional MC DS-CDMA system using all subcarriers for ...
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A Combined Antenna Arrays and Reverse Link Synchronous DS CDMA System over Frequency Selective Fading Channels with Power Control Error
... reverse-link synchronous transmission technique (RLSTT) is incorporated to effectively make better an estimation of covariance matrices at a beamformer-RAKE ...the DS-CDMA system insensitive to the ...
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Reverse Link Performance of Synchronous Cellular DS CDMA Networks in Dispersive Rician Multipath Fading Channels
... Even though a user capacity degradation is encountered in realistic multiple-cell scenarios compared to the single-cell case, the system still exhibits a performance gain for the synchro[r] ...
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Analytical BER Performance of DS CDMA Ad Hoc Networks using Large Area Synchronized Spreading Codes
... It is demonstrated that LAS DS-CDMA exhibits a significantly better performance than the family of classic DS-CDMA systems operating in a quasi-synchronous scenario associated with a hig[r] ...
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Performance of Reverse Link Synchronous DS CDMA System on a Frequency Selective Multipath Fading Channel with Imperfect Power Control
... reverse-link synchronous DS-CDMA system in a frequency-selective Rayleigh fading channel with an imperfect power control ...conventional CDMA system, we show an achievable gain of from 59% to ...
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Analytical Bit Error Rate Performance of DS CDMA Ad Hoc Networks using Large Area Synchronous Spreading Sequences
... area synchronous (LAS) [1] spreading codes exhibits an interference free window (IFW), where the off-peak aperiodic auto-correlations and cross- correlations become zero ...
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An Improved Overloading Scheme for Downlink CDMA
... In any synchronized multiple-access system based on code- division multiple access (CDMA), the maximum number of orthogonal users equals the spreading factor N . In order to be able to cope with overloading of a ...
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Spreading Sequence Design for Multiple Cell Synchronous DS CDMA Systems under Total Weighted Squared Correlation Criterion
... The problem of designing real multicellular CDMA spread- ing design was addressed. Assuming that all base stations are sharing the same extended signal space, the model of up- link was introduced. A composite Gram ...
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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition
... MC DS-CDMA system employs M = 1 BS antenna array with L > 1 array elements, the received SNR is significantly improved and the corresponding curves are shifted to the left-hand side of that corresponding ...
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