uplink DS-CDMA systems
Minimum BER Receiver Filters with Block Memory for Uplink DS CDMA Systems
... The problem of synchronous multiuser receiver design in the case of direct-sequence single-antenna code division multiple access (DS-CDMA) uplink networks is studied over frequency selective fading ...
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Ant Colony Based Multiuser Detection for MC DS CDMA Systems
... the uplink of an MC DS-CDMA ...MC DS-CDMA system supporting K = 32 users with the aid of length-31 Gold codes used as the T-domain spreading ...MC DS-CDMA system ...
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Uplink channel power control improvement in DS CDMA system using channel predictions
... TDMA systems must carefully synchronize the transmission times of all the users to ensure that they are received in the correct time slot and do not cause ...FDMA systems must use a guard-band between ...
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Adaptive Rate DS CDMA Systems using Variable Spreading Factors
... of DS-CDMA systems can be increased when the conventional matched-filter-based receiver is em- ...the uplink transmission of a single-cell DS-CDMA system, where the number of ...
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Coherent Code Tracking for Spatial Transmit Diversity DS-CDMA Systems
... (DS- CDMA) communications, antenna diversity techniques have been proposed and implemented to mitigate the effects of multipath fading [1, ...architecture, uplink reception can be carried out using ...
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On the Uplink Performance of LAS CDMA
... traditional DS-CDMA system is that the MAI and MPI is reduced, as a benefit of using LAS ...two systems communicating over different fading channels associated with different Nakagami fading ...
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Subspace Based Blind and Group Blind Space Time Multiuser Detection for the Generalized Multicarrier DS CDMA Uplink
... single-carrier DS-CDMA systems based on the philosophy of signal subspace estimation, which benefits from a lower compu- tational complexity and a better performance compared to the MOE based blind ...
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A Robust Parametric Technique for Multipath Channel Estimation in the Uplink of a DS CDMA System
... real-life systems, such as the universal mobile telecommunications standard ...a DS-CDMA system, knowledge of the multipath channel impulse response (CIR) is ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... The choice of code greatly depends on the scenario and is se- lected based on its orthogonality, correlation properties, im- plementation complexity and PAPR [4, 12]. Walsh-Hadamard codes are simple to generate ...
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Uplink Power Control and Soft Handoff Prioritization in Multimedia DS-CDMA
... multiband CDMA systems, and investigated the effects of the voice activity factor, the required E b I 0 , the maximum received power, and propagation parameters on the reverse (mobile-to-base) link capacity ...
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Performance of the Smart Antenna Aided Multicarrier DS CDMA and its Uplink
... MC DS-CDMA systems using the above- mentioned optimum linear combining schemes is investigated and compared, when operating in various propagation environ- ...
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Enabling dynamic spectrum access using SS MC CDMA
... By combining frequency domain and time domain dispersal of modulated symbols, two main variants of multi-carrier spread spectrum systems, the MC-CDMA and MC direct sequence CDMA MC-DS-CD[r] ...
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Accurate BER Analysis of Asynchronous DS CDMA Systems in Ricean Channels
... The organization of this paper is as follows. In Section II an asynchronous DS-CDMA system using BPSK modulation is considered in the context of a Ricean fading channel. Then in Section III an accurate BER ...
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Nonlinear Multiuser Receiver for Optimized Chaos-Based DS-CDMA Systems
... of CDMA applications, the network learns the association between the input vector and the desired response in training ...of DS-CDMA system such as the code sequence matrix (S) and user amplitude ...
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Vol 4, No 3 (2012)
... communication systems demand very high data rates, anti-jamming ability and multiuser ...Multicarrier CDMA (MC-CDMA) is an emerging technology to be used in mobile devices operating in an ad hoc ...
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Analysis, Design, and Test of CDMA LFSR with Offset Mask Using Standard ICs
... Finite fields provide the necessary theory in designing LFSR [6] [7]. From a primitive polynomial, the equiva- lent circuit can be modeled with electronic components such as flip flops and XOR gates; each monomial indi- ...
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Performance Analysis of Multi User Detectors for Synchronous DS CDMA Systems
... Abstract: Direct sequence code division multiple access (DS-CDMA) is a prevalent remote innovation. This framework experiences from Multiple Access Interference (MAI) brought about by Direct Sequence users ...
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Binary De Bruijn sequences for DS CDMA systems: analysis and results
... access, CDMA may also provide intrinsically secure communications, by the selection of pseudonoise spreading codes ...a CDMA system, the transmitted signal is spread over a frequency band much wider than ...
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Differential Space Time Block Code Modulation for DS CDMA Systems
... Note that besides the Rake type combination of the de- layed versions from each path, the D-Det receiver exploits the known information of the spreading sequences as well as their delayed paths deterministically. Hence ...
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A Unified Approach to the Analysis of Multicarrier DS CDMA over Nakagami $M$ Fading Channels
... direct-sequence CDMA [2] (multitone DS-CDMA) and that of orthogonal multicarrier DS-CDMA (MC DS-CDMA) [3] spreads the serial-to-parallel (S-P) converted data streams using ...
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