downlink multipath CDMA channels
CDMA Downlink Transmission with Transmit Antenna Arrays and Power Control in Multipath Fading Channels
... For downlink transmission, power control is also important for energy conservation and interference ...above downlink transmission array processing together with power control, we execute it in two steps: ...
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Blind Adaptive Decorrelating RAKE (DRAKE) Downlink Receiver for Space Time Block Coded Multipath CDMA
... a downlink receiver for space-time block coded CDMA systems in multipath ...the multipath replicas of the received signal and the diversity o ff ered by the space-time coding ...the ...
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Support Vector Machine Multiuser Receiver for DS CDMA Signals in Multipath Channels
... fortunately, multipath distortions are often encountered in DS-CDMA systems and will reduce this inherent immunity to ...the downlink scenario, the com- munication channel from base station to ...
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Multicarrier Block Spread CDMA for Broadband Cellular Downlink
... cellular downlink transceiver ...(MIMO) multipath fading channels, our MCBS-CDMA transceiver combines well with space-time block-coding (STBC) techniques, to exploit both multiantenna and ...
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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 via ...
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Adaptive Transmitter Precoding for Time Division Duplex CDMA in Fading Multipath Channels: Strategy and Analysis
... from subspace tracking and the solution to (39). The sub- space tracker we have chosen to use for this adaptive imple- mentation is NAHJ-FST (noise averaged Hermitian Jacobi fast subspace tracking) which has complexity O ...
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BER Performance for Downlink MC-CDMA Systems over Rician Fading Channels
... Equation (15) gives a general closed-form BER expression for MC-CDMA systems over arbitrary Rician multipath fad- ing channels. Since (15) is derived using the fast-convergent power series expansion ...
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Adaptive interference suppression for DS-CDMA systems based on interpolated FIR filters with adaptive interpolators in multipath channels
... a downlink scenario show that the proposed structures achieve a superior bit-error-rate convergence and steady-state performance to previously reported reduced-rank receivers at lower ...
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A Unified Approach to BER Analysis of Synchronous Downlink CDMA Systems with Random Signature Sequences in Fading Channels with Known Channel Phase
... q parameter allows the Nakagami-m distribution to closely approximate Nakagami-q (Hoyt) distribution [9]. Similarly, when m > 1, a one-to-one mapping between the parame- ter m and the Rician K factor allows the ...
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A Kalman Filter Approach to Equalization of CDMA Downlink Channels
... discussing CDMA state- space formulations proposed by several ...of multipath gains and delays can also be found in [13, 14, 15, ...fading channels, relative delay estimation is no longer necessary ...
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Bit Error Performance for Asynchronous Ds Cdma Systems Over Multipath Rayleigh Fading Channels (RESEARCH NOTE)
... Abstract In recent years, there has been considerable interest in the use of CDMA in mobile communications. Bit error rate is one of the most important parameters in the evaluation of CDMA systems. In this ...
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Intersymbol Decorrelating Detector for Asynchronous CDMA Networks with Multipath
... will increase the complexity of the detector and the chan- nel estimation error will deteriorate the performance of the detector. Such required channel estimations are removed in the proposed detector by introducing an ...
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Novel low PAPR parallel FSOK transceiver design for MC CDMA system over multipath fading channels
... Currently, low peak-to-average power ratio (PAPR) modulation schemes are highly recommended for uplink broadband wireless communications. Single-carrier fre- quency division multiple access (SC-FDMA) techniques [1-3], ...
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Polarimetric Vector Receivers for CDMA Multipath Signals
... In Chapter 2, we consider the application of vector antennas to a CDMA sys- tem with multipath fading. We first present a model that describes the complete electromagnetic field detected at the receiver. ...
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Reverse Link Performance of Synchronous Cellular DS CDMA Networks in Dispersive Rician Multipath Fading Channels
... Even though a user capacity degradation is encountered in realistic multiple-cell scenarios compared to the single-cell case, the system still exhibits a performance gain for the synchro[r] ...
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Fuzzy MIMO detector for MC CDMA systems with carrier frequency offset over multipath fading channels
... The first set of simulations evaluated the output SINR performance as a function of input SNR in the proposed multistage fuzzy MIMO MC-CDMA system. The simu- lation results in Figure 2 indicate that the ...
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Performance of Residue Number System Based DS CDMA over Multipath Channels Using Orthogonal Sequences
... By using RNS error-detection codes to find residue errors and to provide erasure information for RS decoding, the error control performance of the non-binary RS code with errors-and-eras[r] ...
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MITIGATION OF FADING EFFECTS IN MULTIPATH CHANNELS
... Multipath fading occurs in any propagation environment with the possibility of transmitted signal taking several paths and/or with relative motion among the receiver and the ...in CDMA, frequency ...
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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 sets ...
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Analysis of a Combined Antenna Arrays and Reverse Link Synchronous DS CDMA System over Multipath Rician Fading Channels
... the multipath Rician fading channel consists of a specular component plus several Rayleigh fading com- ponents ...The multipath Rician radio channel can be modeled as a modified Rayleigh fading channel by ...
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