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DS-CDMA downlink

Space Time Chip Equalization for Maximum Diversity Space Time Block Coded DS CDMA Downlink Transmission

Space Time Chip Equalization for Maximum Diversity Space Time Block Coded DS CDMA Downlink Transmission

... single-antenna DS-CDMA downlink scheme, resulting into the so-called space-time block coded DS-CDMA down- link ...coded DS-CDMA downlink transmission schemes can be ...

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Differentially Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Assisted Multi Carrier DS CDMA Downlink

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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Non Coherent Code Acquisition in the Multiple Transmit/Multiple Receive Antenna Aided Single  and Multi Carrier DS CDMA Downlink

Non Coherent Code Acquisition in the Multiple Transmit/Multiple Receive Antenna Aided Single and Multi Carrier DS CDMA Downlink

... Abstract— We analyse the characteristics of the Non-Coherent (NC) Multiple Transmit/Multiple Receive (MTMR) antenna aided Multi-Carrier (MC) DS-CDMA downlink employing a serial search based ...

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Initial and Post Initial Acquisition in the Serial Search Based Noncoherent Multiple Transmit/Receive Antenna Aided DS CDMA Downlink

Initial and Post Initial Acquisition in the Serial Search Based Noncoherent Multiple Transmit/Receive Antenna Aided DS CDMA Downlink

... the downlink of the inter-cell synchronous CDMA-2000 system ...for DS-CDMA, the main design goal is to acquire perfect timing of the first received signal path impinging at the receiver, since ...

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Differential Coherent Code Acquisition in the Multiple Transmit/Receive Antenna Aided DS CDMA Downlink

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 ...synchronous CDMA systems the mobile station’s (MS) ...

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Analysis of Serial Search Based Code Acquisition in Multiple Transmit Antenna Aided DS CDMA Downlink

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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Serial Search Based Initial Code Acquisition in the Multiple Transmit/Receive Antenna Aided Multi Carrier DS CDMA Downlink

Serial Search Based Initial Code Acquisition in the Multiple Transmit/Receive Antenna Aided Multi Carrier DS CDMA Downlink

... In this treatise, we analysed the multiple antenna aided trans- mit/receive diversity effects on the performance of the initial code acquisition scheme of the inter-cell synchronous MC-DS-CDMA ...

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Differentially Coherent Code Acquisition in the MIMO Aided Multi Carrier DS CDMA Downlink

Differentially Coherent Code Acquisition in the MIMO Aided Multi Carrier DS CDMA Downlink

... employment of multi-carrier transmissions leads to exactly the same detrimental effect on the achievable MAT performance as that imposed by employing multiple transmit antennas owing to the reduced ‘per-diversity-branch’ ...

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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition

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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An Improved Overloading Scheme for Downlink CDMA

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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Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition

Multi Functional Antenna Array Assisted MC DS CDMA Using Downlink Preprocessing Based on Singular Value Decomposition

... for downlink transmission in multicarrier direct-sequence code-division multiple-access (MC DS-CDMA) systems using multiple base-station antenna arrays, where each antenna ar- ray employs multiple ...

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Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems

Exploring the reconfigurability options of multi carrier CDMA in cognitive radio systems

... sequence CDMA (MC-DS-CDMA) (time domain ...of CDMA and OFDM, resulting in better frequency diversity and higher data ...regular DS-CDMA ...

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A Unified Exact BER Performance Analysis of Asynchronous DS CDMA Systems Using BPSK Modulation over Fading Channels

A Unified Exact BER Performance Analysis of Asynchronous DS CDMA Systems Using BPSK Modulation over Fading Channels

... Abstract— An asynchronous binary DS-CDMA system using random spreading sequences is considered when communicating over various fading channels. New closed-form expressions are derived for the conditional ...

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Analysis of Carrier Frequency Selective Offset Estimation - Using Zero-IF and ZCZ In MC-DS-CDMA

Analysis of Carrier Frequency Selective Offset Estimation - Using Zero-IF and ZCZ In MC-DS-CDMA

... Abstract — A new method for frequency synchronization based upon Zero-Intermediate Frequency (Zero-IF) receiv- er and characteristics of the received signal’s power spec- trum for MC-DSCDMA-Uplink system is proposed in ...

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Downlink Steered Space Time Spreading Assisted Generalised Multicarrier DS CDMA Using Sphere Packing Aided Multilevel Coding

Downlink Steered Space Time Spreading Assisted Generalised Multicarrier DS CDMA Using Sphere Packing Aided Multilevel Coding

... In this paper we proposed a 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 ...

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ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS

ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS

... diagram in Fig.4. 1. Assuming Nc = K, at each symbol period and using the instantaneous values of Xi, the decision variables’ distribution for each of the pc allocation patterns is evaluated and the optimal pattern is ...

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Slow Frequency Hopping Multicarrier DS CDMA for Transmission over Nakagami Multipath Fading Channels

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 Utility Based Downlink Radio Resource Allocation for Multiservice Cellular DS CDMA Networks

A Utility Based Downlink Radio Resource Allocation for Multiservice Cellular DS CDMA Networks

... In other words, we propose a utility-based base station assignment and resource scheduling scheme for the down- link in multiservice cellular DS-CDMA networks. Unlike previous works, we solve the problem ...

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Distributed Resource Allocation Assisted by Intercell Interference Mitigation in Downlink Multicell MC DS CDMA Systems

Distributed Resource Allocation Assisted by Intercell Interference Mitigation in Downlink Multicell MC DS CDMA Systems

... multicell downlink MC DS- CDMA ...MC DS-CDMA associated with the RAIM scheme can constitute a promising candidate that facilitates practical implementation in future communication ...

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An Efficient Measure for Nonlinear Distortion Severity due to HPA in Downlink DS CDMA Signals

An Efficient Measure for Nonlinear Distortion Severity due to HPA in Downlink DS CDMA Signals

... Downlink direct sequence-code division multiple access (DS-CDMA) signals typically exhibit large dynamic range. This large dynamic range results in signal distortion for components falling in the ...

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