Multipath Channels
Transmit Delay Structure Design for Blind Channel Estimation over Multipath Channels
... The multipath channels are assumed to have 6 rays, the amplitude of each ray is zero-mean complex Gaussian with unit variance, the first ray has no initial delay, and the delays for the remaining 5 rays are ...
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Factor Graph Based Soft Self Iterative Equalizer for Multipath Channels
... the cycle condition worsens as more antennas are employed. To the best of our knowledge, little e ff orts have been made to rigorously quantify the cycle condition of factor graphs. Empirically, the cycle condition is ...
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An Efficient Code Timing Estimator for DS CDMA Systems over Resolvable Multipath Channels
... Another near-far resistant code-timing estimator, re- ferred to as the large-sample ML (LSML) algorithm, was pro- posed in [7]. LSML is also training-based and can be used to perform code-timing estimation for the ...
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Chip Discrimination for UWB Impulse Radio Networks in Multipath Channels
... The focus of channel model research as applied to UWB communications is to develop and apply a statistical model to a system simulation that captures time-varying distortions such as attenuation, phase jitter, and ...
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Performance Analysis of a High Data Rate UWB-Dtr System in Dense Multipath Channels
... In order to double data rate and to reduce ISI in conjunction with a 3 dB gain in performance, the DTR scheme can be employed. The DTR scheme was first proposed in [20] which is a modification of the TR system [21–23] in ...
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STUDY OF VARIOUS MULTIPATH CHANNELS& SMALL-SCALE FADING& ITS PERFORMAMCE IN WIRELESS COMMUNICATION
... In this Research, we exhibit a time-frequency point of view of wireless communications after some time-varying multipath channels. Our discourse is principal with regards to code-division multiple access ...
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Joint maximum likelihood time delay estimation for LTE positioning in multipath channels
... the multipath channel and counteract its ...close-in multipath, by introducing an arbitrary tap with variable position between the first two equi-spaced ...(ETU) multipath channel model, additive ...
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Joint Symbol Timing and CFO Estimation for OFDM/OQAM Systems in Multipath Channels
... In this paper we consider the problem of data-aided synchronization for OFDM/OQAM systems in multipath channels. In particular, the joint maximum-likelihood (ML) estimator for CFO, amplitudes, phases, and ...
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GA Based Sensing of Sparse Multipath Channels with Superimposed Training Sequence
... terrestrial high-definition television broadcasting systems, etc. A ST sequence based technique by Jitendra et al. [3] utilizes the first-order statistics of training and information sequences to estimate the channel. The ...
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Adaptive Minimum BER Linear Multiuser Detection for DS CDMA Signals in Multipath Channels
... Abstract—The problem of constructing adaptive minimum bit error rate (MBER) linear multiuser detectors is considered for di- rect-sequence code division multiple access (DS-CDMA) signals transmitted through ...
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On Some Optimal MIMO Antenna Coefficients in Multipath Channels
... Abstract—This paper derives some optimum transmit and receive antenna coefficients in wireless multipath channels based on the spherical vector wave multimode expansion of the multiple-input multiple-output ...
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Robust OFDM Timing Synchronisation in Multipath Channels
... Orthogonal frequency division multiplex (OFDM) is widely used in or proposed for a number of communication appli- cations, including wireless LAN [1] and digital broadcast systems [2, 3], this is due to its inherent ...
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Adaptive Transmitter Precoding for Time Division Duplex CDMA in Fading Multipath Channels: Strategy and Analysis
... The recently developed blind adaptive techniques for multiuser detection in code division multiple access (CDMA) systems offer an attractive compromise of performance and complexity. However, the desire to further reduce ...
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Experimental Assessment of Different Receiver Structures for Underwater Acoustic Communications over Multipath Channels
... Figure 3 shows the simulated responses to the vertical array with five hydrophones spanning the depth of 0.5 m to 4.5 m. The results are plotted as a function of reduced time, which is the actual travel time with the ...
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Support Vector Machine Multiuser Receiver for DS CDMA Signals in Multipath Channels
... detector (MUD) is considered for direct sequence code division multiple access (DS-CDMA) signals transmitted through multi- path channels. The emerging learning technique, called support vector machines (SVMs), is ...
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Signal Reception for Space Time Differentially Encoded Transmissions over FIR Rich Multipath Channels
... With sophisticated signal and information processing algorithms, air interfaces with space-time (ST) coding and multiple recep- tion antennas substantially improve the reliability of wireless links. This paper proposes a ...
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MITIGATION OF FADING EFFECTS IN MULTIPATH CHANNELS
... The mitigation techniques proposed in literature are diversity, equalization and error correction coding. However, the exact mitiga- tion to apply to a particular fading model remains a challenge. The performance ...
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Adaptive Zero Padding OFDM over Frequency Selective Multipath Channels
... In channels with large de- lay spread, simulation results show that the proposed AZP- OFDM offers better performance than those of both CP- and ZP-OFDM with fixed guard ...
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An enhanced SCHT based Alamouti scheme over multipath channels
... An archetype to transmit data over channels affected by Rayleigh fading using multiple antennas is achieved by using Space - time block coding. The data received by STBC is divided into smaller m branches and are ...
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Compressed Sensing of Sparse Multipath MIMO Channels with Superimposed Training Sequence
... 1) SiT based CCS: During the past few years, compressed sensing has emerged as a new paradigm for sampling and reconstruction of sparse signals. It has been established in [29– 32] that a finite-dimensional sparse signal ...
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