DS-CDMA downlink signal
An Efficient Measure for Nonlinear Distortion Severity due to HPA in Downlink DS CDMA Signals
... Copyright © 2010 Tarek K. Helaly et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided ...
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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition
... In CDMA wireless communications the MC DS-CDMA is recog- nized as a high-flexibility multiple-access scheme, which is capable of providing a higher number of degrees-of-freedom for system design and ...
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Differentially Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Assisted Multi Carrier DS CDMA Downlink
... performance of the SDSS-aided MC-DS-CDMA code acquisition scheme in both DC and NC scenarios, respectively, when parame- terised by both the number of transmit and receive antennas and using U = 4 ...
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Differentially Coherent Code Acquisition in the MIMO Aided Multi Carrier DS CDMA Downlink
... received signal strength is expected to result in a low acquisition performance, despite achieving a high transmit-and frequency-diversity ...high signal strength per transmit antenna and per ...
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Coherent and Differential Downlink Space Time Steering Aided Generalised Multicarrier DS CDMA
... codes. The algorithm aims for ensuing that the users sharing the same T-domain sequence have the lowest possible F- domain interference coefficient. The selection procedure will continue, until all the users have been ...
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Joint Impact of Frequency Synchronization Errors and Intermodulation Distortion on the Performance of Multicarrier DS-CDMA Systems
... the signal-to-noise ratio (SNR) degra- dation produced by the CFO in additive white Gaussian noise (AWGN) for MC-DS-CDMA downlink systems [6]; however, they did not consider the NLA at the ...
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Distributed Resource Allocation Assisted by Intercell Interference Mitigation in Downlink Multicell MC DS CDMA Systems
... The proposed benchmark and RAIM schemes can be modi- fied for deployment in practical systems which may have a large number of cells and users. First, the proposed SA algorithms will be directly used in practical ...
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Analysis of Serial Search Based Code Acquisition in Multiple Transmit Antenna Aided DS CDMA Downlink
... total signal power transmitted from the multiple transmit antennas must be fixed, regardless of the number of transmit ...received signal strength would lead to a low acquisition performance, even if the ...
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Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS CDMA Downlink
... [3], [7], [8]. Here we adopted the Full-Period Correlation (FPC) based scheme of [7],[8] for the sake of analysing the characteristics of serial search aided differentially coherent code acquisition in the multiple ...
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Space Time Chip Equalization for Maximum Diversity Space Time Block Coded DS CDMA Downlink Transmission
... baseband signal pro- cessing algorithms and architectures for future wireless communi- cation systems, like third generation (3G) and fourth generation (4G) cellular networks, and wireless local area networks ...
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ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS
... different signal-to- noise ratios. Rake receivers are used in CDMA systems for two reasons, the 1st reason is inter-symbol interference cancellation and the second reason is to utilize the multi-path ...
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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition
... (MC DS-CDMA) constitutes a high-flexibility multiple-access scheme, which is capable of providing a degree of freedom for system designers in comparison to both single-carrier DS-CDMA and ...
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High Capacity Downlink Transmission with MIMO Interference Subspace Rejection in Multicellular CDMA Networks
... Performance of MUD detectors heavily relies on the dis- tribution of interference. For instance, MUD typically o ff ers very significant performance gains if the interference arrives from one strong source. However, if ...
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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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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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Equivalence of Linear MMSE Detection in DS CDMA and MC CDMA Systems over Time and Frequency Selective Channels
... We also note that, from an implementational point of view, the available hardware may favor one system over the other. For instance, the problem of peak-to-average ratio in MC-CDMA system may make implementing ...
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Analysis, Design, and Test of CDMA LFSR with Offset Mask Using Standard ICs
... In this expression, each monomial indicates one element in the output sequence. R(X) is equivalent to: 0000000000000010011110101110101101 and therefore confirms the obtained LFSR signals (srg_out, SRG_ output) on timing ...
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Blind chip-rate equalisation for DS-CDMA downlink receiver
... The adaptation algorithm is based on a constant modulus criterion forcing the various user symbols onto a constant modulus, for which a stochastic gradient descent algorithm is derived..[r] ...
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Joint Transmitter Receiver Optimization in the Downlink CDMA Systems
... the downlink code-division multiple access (CDMA) system capacity, we propose to minimize the total transmitted power of the system subject to users’ signal-to-interference ratio (SIR) requirements ...
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Multicarrier Block Spread CDMA for Broadband Cellular Downlink
... specific CDMA and OFDM concepts, namely, block-spread CDMA and linearly-precoded ...block-spread CDMA, MCBS-CDMA pre- serves the orthogonality among users, even after propaga- tion through a ...
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