direct-sequence code-division multiple-access systems
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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Influence of laser diode nonlinearities on fibre optic systems supporting direct-sequence code division multiple access signals
... cellular systems to enable communication with a person, at any time, at any place, and in any form ...wireless access, personal mobility based on personal numbers, and service portability through man ...
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Study and analysis the BER performance of linear multiuser detectors in non-Gaussian noise channel
... of direct sequence code-division multiple-access (DS-CDMA) ...structured multiple access interference in CDMA communication ...conventional systems based on ...
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Using chaotic sequence in direct sequence spread spectrum based on code division multiple access (DS CDMA)
... Direct sequence spread spectrum is one of the spread spectrum ...(PN) sequence is used for DS-CDMA systems, but it lacks security due to fact that there is limited number of available PN ...
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Modeling and Simulation of CDMA Codes in Scilab
... of systems such as Direct Sequence Code Division Multiple Access ...Gold Code Generator for Global Positioning System ...
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Transmitter-based Multiple Access Interference Rejection and Diversity Techniques for Code-division Multiple Access Systems
... wireless systems, the network consists of numerous mobile users communicating with one or multiple base stations (BS) that are interconnected with a mobile telephony switching ...the code- ...
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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition
... multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) systems using multiple base-station antenna arrays, where each antenna ar- ray employs ...
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Joint Impact of Frequency Synchronization Errors and Intermodulation Distortion on the Performance of Multicarrier DS-CDMA Systems
... 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 (NLA) ...
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Differential space time modulation schemes for smart antenna aided generalized multicarrier DS CDMA systems
... Block Code (STBC), which was capa- ble of achieving a substantial diversity gain by simultaneously transmitting two symbols with the aid of two ...for Direct Sequence Code Division ...
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Time Hopping Multicarrier Code Division Multiple Access
... namely direct-sequence SS (DS-SS) and frequency-hopping SS ...(UWB) multiple-access communications [3], ...ns. Multiple users in UWB systems are usually supported with the aid of ...
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Evaluation of BER in CDMA with Parallel Interference Cancellation
... wireless systems presents a big challenge, since these systems should be able to cope with severely time-dispersive channels and are expected to have high spectral and power ...communication systems ...
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Performance of Space Code Division Multiple Access Systems Using Reduced Rank Detection
... of multiple- input multiple-output space-division, code-division multiple- access (MIMO SCDMA) is investigated, when the low-complexity reduced-rank detection is ...
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Multiple Access Technologies for Beyond 3G Wireless Cellular Systems
... cellular systems are ...time division, frequency-division, and code-division ...B3G systems in terms of high-data-rate transmission and burst data traffic network load, we ...
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Implementation of multi carrier code division multiple access frequency division multiple access with beyond 4G specifications
... AWGN channels. PAPR of MC-CDMA System over Rayleigh and AWGN Channel simulation is presented and MC-CDMA System with N-point FFT size is simulated to optimize the number of points in MC-CDMA system. Finally PAPR of ...
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BER performance of MC DS CDMA systems in the presence of timing jitter : a thesis presented in partial fulfillment of the requirements for the degree of Master of Engineering in Information and Telecommunication Engineering at Massey University, Palmerston North, New Zealand
... CDMA systems based on the combination of CDMA schemes and OFDM technique, which are referred to as multi-carrier CDMA systems, has received a lot of attention in the field of wireless communications due to ...
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Lowest PAPR Selection Technique from SLM and PTS with One IFFT Block in Wireless MC-CDMA Communication Systems
... In the present work, a new method has been presented to reduce the PAPR in MC-CDMA systems. Moreover, calculating complexity of the new system is improved. This technique combines the PTS and SLM techniques and ...
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Support Vector Machine Multiuser Receiver for DS CDMA Signals in Multipath Channels
... detector (MUD) is considered for direct sequence code division multiple access (DS-CDMA) signals transmitted through multi- path channels. The emerging learning technique, called ...
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Optical Code Division Multiple Access Performance Signature Over Multimode Optical Fiber Transmission Systems
... Code division multiple access technique was originally investigated in radio frequency communication systems [1- ...signature sequence can be ...optical code is defined ...
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Transmitter Diversity and Multiuser Precoding for Rayleigh Fading Code Division Multiple Access Channels
... 4.096 Mcps chip rate, and the bit rate of 128 kbps [39]. Orthogonal codes are obtained using the tree structure, explained in [39]. We assume that there is no estimation error at the MS. The results are for a single user ...
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Implementation of Code Division Multiple Access using Asynchronous Sequential Techniques
... associated code sequence. Spreading codes of a spreading sequence can be divided into pseudo-noise (PN) code and/or orthogonal ...spreading code, and in the receiver it is correlated ...
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