DS-CDMA downlink system
Downlink Steered Space Time Spreading Assisted Generalised Multicarrier DS CDMA Using Sphere Packing Aided Multilevel Coding
... novel system that amalgamates the advantages of spatial diversity, frequency diversity as well as beamforming gain based on the principle of SSTS in order to enhance the attainable performance of the generalised ...
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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 only a single transmit antenna array (M = 1) using a single array element (L = 1), the attainable BER performance is the ...MC DS-CDMA system employs M ...
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An Efficient Measure for Nonlinear Distortion Severity due to HPA in Downlink DS CDMA Signals
... IBO levels are computed based on the BER in (16). It is evident, from the BERs in Table 1, that a representation with a minimal value of one of the nonlinearity measures of interest may achieve the best performance at ...
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Space Time Chip Equalization for Maximum Diversity Space Time Block Coded DS CDMA Downlink Transmission
... the system is fully loaded, that is, N = U − 1, the orthogonal complement of the subspace spanned by the even and odd multiuser code matrices C[2 i ] and C[2 i + 1] and the even and odd pilot code matrices C p ...
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Joint Impact of Frequency Synchronization Errors and Intermodulation Distortion on the Performance of Multicarrier DS-CDMA Systems
... MC-DS-CDMA downlink systems [6]; however, they did not consider the NLA at the ...spread-spectrum system, which basically is an MC- DS-CDMA scheme with one active user ...
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Performance of the Smart Antenna Aided Generalized Multicarrier DS CDMA Downlink using both Time Domain Spreading and Steered Space Time Spreading
... PERFORMANCE RESULTS In this section the BER performance of the downlink of a generalized MC DS-CDMA system employing SSTS and using 32-chip Walsh codes as T-domain spreading sequences as[r] ...
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Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS CDMA Downlink
... MIMO-aided CDMA system results in combining the low-energy, noise-contaminated signals of the transmit antennas, which ultimately increases the MAT by an order of magnitude, when the SINR is relatively ...
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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition
... MC DS-CDMA system using multiple BS transmit antenna arrays, where each antenna array employs multiple array ...of downlink users, while simultaneously to achieve the highest possible transmit ...
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Analysis of Serial Search Based Code Acquisition in Multiple Transmit Antenna Aided DS CDMA Downlink
... In this paper, we analysed the multiple antenna aided transmit diversity effects on the initial acquisition performance of the inter-cell synchronous CDMA downlink. The probabilities of correct detection ...
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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems
... (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 ...MC-CDMA system (using Walsh ...
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ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS
... the downlink of direct sequence code division multiple access (DS-CDMA) systems in additive white Gaussian noise (AWGN) ...in DS-CDMA can greatly benefit a wireless communication ...
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Distributed Resource Allocation Assisted by Intercell Interference Mitigation in Downlink Multicell MC DS CDMA Systems
... MC DS-CDMA will be at the order of the number of time domain resolvable paths of wireless channels and, hence, will usually be low ...MC DS-CDMA can be a promising solution for supporting ...
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A Utility Based Downlink Radio Resource Allocation for Multiservice Cellular DS CDMA Networks
... in CDMA cellular networks is a challenging problem especially when different parameters are involved in the system such as the rate, QoS, and delay requirements of various ...
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Differentially Coherent Code Acquisition in the MIMO Aided Multi Carrier DS CDMA Downlink
... acquisition scheme in the context of the multiple transmit antenna aided SC-DS-CDMA downlink. However, there is a paucity of in-depth studies on the fundamental character- istics of code acquisition ...
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Differentially Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Assisted Multi Carrier DS CDMA Downlink
... MC-DS-CDMA system in terms of characterising their MAT performance, except for the derivation of the correct detection and the false alarm probability as a function of both the number of ...
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Coherent and Differential Downlink Space Time Steering Aided Generalised Multicarrier DS CDMA
... the system parameters outlined in Table ...each system shows that the highest relative SNR gain is achieved for the STS system, when employing two transmit diversity ...
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Analytical Bit Error Rate Performance of DS CDMA Ad Hoc Networks using Large Area Synchronous Spreading Sequences
... LAS DS-CDMA exhibits a sig- nificantly better performance than the family of traditional spreading sequences used in a quasi- synchronous DS-CDMA scenario having a low number of resolvable ...
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An Improved Overloading Scheme for Downlink CDMA
... multiple-access system based on code- division multiple access (CDMA), the maximum number of orthogonal users equals the spreading factor N ...synchronized CDMA sys- tem ...spread system (PN) ...
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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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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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