time selective fading channels
Signal detection for orthogonal space-time block coding over time-selective fading channels: A PIC approach for the G(i) systems
... However, time selective fading channels do exist, and in such case the conventional O-STBC detectors can suffer from a large error floor in the high signal-to- noise ratio (SNR) ...
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A differential ML combiner for differential amplify-and-forward system in time-selective fading channels
... a time-selective fading ...fast- fading scenarios, the error performance of the system is determined by both the average channel gain and the fading rate of each channel involved at the ...
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Improving Performance and Detection Schemes of Mimo-Ofdm Systems in the Presence of Phase Noise and Doubly-Selective Fading Where Channel is Both Time and Frequency Selective Offia Innocent.S, Udeh Ikemefuna James, Eke J
... MIMO-OFDM system more vulnerable to phase noise or time variations of the channel coefficients. The author has assumed perfect channel state information CSI for all numerical results so far. In practical systems, ...
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An Adaptive Receiver for the Time and Frequency Selective Fading Channel
... The channel is modeled as a truncated power series [1] which represents the dispersive fading channel as a sum of three elementary flatfading channels.. The proposed receiver consists of[r] ...
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Performance Analysis of Multiple Symbol Differential Detection for OFDM over Both Time and Frequency Selective Rayleigh Fading Channels
... over time- and frequency-selective Rayleigh fading channels under the as- sumption that the guard time is longer than the delay spread, thus causing no e ff ective ...the time- ...
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Orthogonal frequency division multiplex synchronization techniques for frequency selective fading channels
... The frequency acquisition algorithm has to provide an initial frequency error estimate, which is sufficiently accurate for the subsequent frequency tracking algorithm to support fine tracking. Generally the initial ...
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Optimizing time and space MIMO antenna system for frequency selective fading channels
... space time coding in mul- tiple-input multiple-output (MIMO) channels [10], [11] or joint transmitter receiver systems ...multipath fading, with prior knowledge of the channel at the ...flat ...
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Effective Needs of Space-Time-Frequency Coding in MIMO-OFDM Communication over Frequency Selective Fading Channels
... Most extreme differing qualities pick up is accomplished in [14] and [2] to the detriment of data transfer capacity productivity [14] or expanded unraveling multifaceted nature [14]. Then again, [1], [4], [5], [12], and ...
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Distributed Space Time Block Code over Mixed Rayleigh and Rician Frequency Selective Fading Channels
... first time slot, the source serially transmits two data blocks to two ...next time slot, one relay only amplifies and forwards its received signals, while the other precodes its received data blocks by a ...
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1. A robust and efficient channel estimation scheme for ofdm systems in frequency selective fading channels
... that the robustness of transformations-based CE approaches such as discrete Fourier transform (DFT), discrete cosine transform (DCT) under various channel distributions. The experimental analysis given in [22] discloses ...
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Performance of Asynchronous MC CDMA Systems with Maximal Ratio Combining in Frequency Selective Fading Channels
... in channels with corre- lated Rayleigh, Rician, or Nakagami fading ...its time-frequency equivalence, which states that combining the subcarriers using MRC has exactly the same effect as combining the ...
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Adaptive antennas at the mobile and base stations in an OFDM/TDMA system
... This paper has demonstrated that the combination of OFDM with smart antennas provides improvements in performance compared to wireless communication systems based on OFDM or smart antennas alone. Simulation results show ...
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Design & Analysis of Space Time Trellis Codes for Different Fading Channels
... the fading channel, viz. a) Non-frequency selective channel – the channel does not have temporal interference, b) The fading from each transmit antenna to any receive antenna are independently ...
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A Low Complexity Approach to Space Time Coding for Multipath Fading Channels
... In classical wireless cellular systems, user terminals are miniaturized handsets and typically cannot host more than a single antenna. On the other hand, base stations can be eas- ily equipped with multiple antennas. ...
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New Multiple Antennas Method based Energy Detector for Cognitive Radio over Fading Channels
... Nakagami- fading channels with asingle antenna, under ...[12], fading channels can be roughly divided into two types: (1) Large-scale fading due to (a) Path loss and (b) Shadowing, both ...
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An Extensive Review on STBC for MIMO OFDM System
... 355 Authors Parismita Gogoi and Kandarpa Kumar Sarma demonstrated in their research paper the Diversity methods provide the receiver with independently faded copies of the transmitted signal with the expectation that at ...
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Joint Effects of Synchronization Errors of OFDM Systems in Doubly-Selective Fading Channels
... symbol time offset (STO), carrier frequency offset (CFO), and sampling clock frequency offset (SCFO) in OFDM ...symbol time (ST) is not located in the intersymbol interference (ISI) free region, ISI is ...The ...
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Reduced feedback for selective fading MIMO broadcast channels
... the selective MIMO BC, where links are selective in both time and ...the time-frequency selective channel model can be well approximated by the parallel correlated ...
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Optimal Training for Time-Selective Wireless Fading Channels Using Cutoff Rate
... SISO time- selective Rayleigh flat-fading channel under the cutoff ...for fading channels can be found in ...(independent fading) and in [18, 19] (temporally correlated ...
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Successive interference cancellation schemes for time-reversal space-time block codes
... for time-reversal space-time block codes to combat intersymbol interference in frequency- selective fading ...under time-invariant conditions. Results for frequency-selective and ...
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