downlink multicarrier CDMA systems
Joint Impact of Frequency Synchronization Errors and Intermodulation Distortion on the Performance of Multicarrier DS-CDMA Systems
... of 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 ...
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Coherent and Differential Downlink Space Time Steering Aided Generalised Multicarrier DS CDMA
... DSTM systems significantly degrades in the presence of even rela- tively mild Interference and breaks down completely, when strong interference is inflicted ...
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Design of a Baseband Transceiver for Multicarrier CDMA Communications
... setting the frequency spacing to the inverse of the symbol time, as in the case of OFDM [1, 2]. The received signals are transformed into the frequency domain and despreaded. In this way, signals scattered among many ...
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On Intercell Interference and Its Cancellation in Cellular Multicarrier CDMA Systems
... In this paper, we have described and investigated sev- eral approaches of intercell interference cancellation (ICIC) schemes in a cellular MC-CDMA downlink environment. The hard ICIC takes into account the ...
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Generalized Multicarrier CDMA: Unification and Linear Equalization
... the downlink provided that a sufficiently long cyclic prefix is used at the ...ciency. Multicarrier (MC) CDMA systems have been developed to capitalize on both OFDMA’s resilience to MUI and ...
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Performance of multicarrier complementary coded CDMA under frequency selective Nakagami m fading channels
... of downlink MC CC-CDMA system by mitigating MAI in frequency-selective Nakagami-m fading ...CC-CDMA systems with uncorre- lated channel gain in each subcarrier under frequency- selective ...
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Distributed Resource Allocation Assisted by Intercell Interference Mitigation in Downlink Multicell MC DS CDMA Systems
... multicell downlink multicarrier direct-sequence code division multiple-access (MC DS-CDMA) systems, which aim to maximize the system’s spectral efficiency ...
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DOA Estimation in the Uplink of Multicarrier CDMA Systems
... Antenna arrays at the base station (BS) can dramatically im- prove the capacity of a communication system [1–3]. Ac- tually, they can be exploited in various ways. First, to form retrodirective beams that select the ...
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BER Performance for Downlink MC-CDMA Systems over Rician Fading Channels
... MC-CDMA systems, based on the combination of code-division multiple-access (CDMA) and orthogonal frequency-division multiplexing (OFDM) techniques, were proposed in 1993 ...The multicarrier ...
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Multicarrier Block Spread CDMA for Broadband Cellular Downlink
... combine CDMA with OFDM have recently gained increased momen- tum as candidate air interface for future broadband cellu- lar systems ...the CDMA and the OFDM component in the transmission ...MT-DS- ...
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MAP Channel Estimation Based PIC Receiver for Downlink MC CDMA Systems
... We propose a joint MAP channel estimation and data detection technique based on the expectation maximization (EM) method with paralel interference cancelation (PIC) for downlink multicarrier (MC) code ...
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Timing Free Blind Multiuser Detection for Multicarrier DS/CDMA Systems with Multiple Antennae
... sequence CDMA (DS-CDMA)— and in particular its resistance to multipath e ff ects induced by the radio channel as the communication rate grows larger and larger [1]—while relaxing some very demand- ing ...
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Downlink Steered Space Time Spreading Assisted Generalised Multicarrier DS CDMA Using Sphere Packing Aided Multilevel Coding
... According to Equation (7), the decoded signals represent scaled versions of x 1,u1 and x 1,u2 corrupted by both the complex-valued AWGN and the MUI, when the system employs TF-domain spread- ing. This observation implies ...
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An Improved Overloading Scheme for Downlink CDMA
... An improved overloading scheme is presented for single-user detection in the downlink of multiple-access systems based on OCDMA/OCDMA (O/O). By displacing in time the orthogonal signatures of the two user ...
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Multiuser Detection in Multicarrier CDMA Systems Employing Both Time Domain and Frequency Domain Spreading
... The benefits of employing both T-domain spreading and F- domain spreading in MC DS-CDMA systems are multi-fold. Firstly, the future generations of broadband multiple-access systems [3] are expected ...
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Performance Evaluation of oF DM and Prototype FBMC-OQAM Cognitive Radio under constraints of variable Overlapping factors
... The impact of the present study of FBMC CR is highlighted through the role of number of sub channels. Readjustment of various parameter levels leads to optimization between different radio environment parameters under ...
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Reverse Link Outage Probabilities of Multicarrier CDMA Systems with Beamforming in the Presence of Carrier Frequency Offset
... MC- CDMA systems; second, outage probabilities are derived for MC-CDMA systems with either perfect or imperfect beam- forming in the presence of ...
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A Proposed Turbo Coded Wavelet Packet Modulation based MC CDMA
... modulation, CDMA signal is spreaded over several carriers by which frequency diversity is achieved similar to path diversity in Rake receiver, but with lower complexity of equalization in the frequency domain ...
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Downlink Space Frequency Preequalization Techniques for TDD MC CDMA Mobile Radio Systems
... The paper is organized as follows. In Section 2, we present the proposed downlink MC-CDMA system. In Section 3, we analytically derive the preequalization algo- rithms for the two receiver configurations ...
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ADAPTIVE CODE TO USER ALLOCATION FOR INTERFERENCE MANAGEMENT ON THE DOWNLINK DS-CDMA SYSTEMS
... The use of orthogonal Walsh-Hadamard spreading sequences provides excellent performance for the downlink of direct sequence code division multiple access (DS-CDMA) systems in additive white Gaussian ...
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