time-varying SNR channels
Power line communications over time-varying frequency-selective power line channels for Smart Home Applications
... To understand the cause of these behaviours, we plot the amplitude spectrum of the three windows in the cases of very low and very high SNR. When SNR is high, it can be observed that the SONR window and the ...
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Reduced Order Estimation of Time Varying Wireless Channels in Real Life Scattering Environment
... the channel. Again, there is a very good agreement of simulation and theory. BEP is plotted in Fig. 3.14, where we may observe how growing estimation error (as a result of additional blocks per frame) decreases ...
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Time-Varying FIR Equalization for MIMO Transmission over Doubly Selective Channels
... MMSE and ZF equalizers. An SNR gain of 1.3 dB and 2 dB is observed for DFE-I and DFE-II over the linear MMSE equalizer, respectively. The performance of the linear ZF equalizer is very marginal. The performance of ...
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Non data aided ML SNR estimation for AWGN channels with deterministic interference
... These moment-based estimators are only valid in the high SNR range. Unfortunately, they usually require a large quantity of samples to obtain accurate estimation, which is not realistic in practical ...
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Estimation of Critical Performance and Optimization of Scalable Joint Source/Channel Coder (SJSCC) For Time Varying Channels
... wireless channels and extensive simulations are carried out for various channel states and bit ...AWGN channels. Finally, we claim the improvement in PSNR and SNR values ranging from ...
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Performance Analysis of an Adaptive Incremental Cooperative Relaying Scheme for Wireless Relay Networks
... fading channels by exploiting relay nodes to retransmit the source data packet to the ...over time-varying fading channels, this paper proposes an adaptive incremental cooperative re- laying ...
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Wireless Signal Quality Enhancement by Improving SNR for MIMO Channels Using 64 QAM
... Rapidly time varying multi-carrier, multi-user based MIMO channels due to high mobility have inevitably necessitated equalization for the availability of partial or no channel state information at ...
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Frequency-Shift Zero-Forcing Time-Varying Equalization for Doubly Selective SIMO Channels
... its time-domain counterpart, exhibits many sim- ilarities to time-invariant filtering, wherein the time-varying component of the equalizer consists of computing FRESH versions of the received ...
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A Receiver Structure for Frequency Flat Time Varying Rayleigh Channels and Performance Analysis
... mance. For the lower Doppler f dT = 0.1 , increasing K beyond 4 does not improve performance for SNR less than 50 dB. For larger Doppler f dT = 0.25 , using more than four basis functions can slightly improve ...
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LTE modeling for low complexity Time Varying channels in MIMO-OFDM
... based OFDM system. From the performance curve we have observed that the BER curves obtained from wavelet based OFDM are better than that of DFT based OFDM. We used three modulation techniques for implementation that are ...
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... computational time complexities between the conventional and the proposed DM method is presented in the ...fading channels and time-varying frequency-selecting Rayleigh fading ...and ...
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Antenna Controller for Low-Latency and High Reliability Robotic Communications over Time-Varying Fading Channels
... certain time-sensitive ...experiencing time-variant, small-scale fading with a time-variant coherence time which on occasions can take large values while on other occasions it can take values ...
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Securing OFDM over Wireless Time Varying Channels Using Subcarrier Overloading with Joint Signal Constellations
... As would be apparent in the following sections, the suggested method offers a low complexity solution for securing OFDM over the time-varying wireless channel. The receiver uses a single MF and performs ...
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Code-Aided Estimation and Detection on Time-Varying Correlated Mimo Channels: A Factor Graph Approach
... parameter varying according to a discrete-time linear ...a time-varying channel [7–9]. How- ever, estimating a time-varying channel in the presence of unknown data symbols is not ...
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Nonlinear speech enhancement by virtual increase of channels and maximum SNR beamformer
... trary channels of virtual microphone signals by using two channels of real microphone signals, then we perform array signal processing using microphone signals consist- ing of both real and virtual ...
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Single carrier fractional Fourier domain equalization system with zero padding for fast time varying channels
... much attention. Until fractional Fourier transform was introduced in the field of image analysis in optics and signal processing by Mendlovic [6], Ozaktas [7], and W. Lohmann [8,9] and had it attracted great attention. ...
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EFFECT OF FATIGUE ON SSVEP DURING VIRTUAL WHEELCHAIR NAVIGATION
... There are several criteria used for channel estimation, for reasons of complexity, the estimation can be per-formed by using either linear MMSE criterion (Wiener filtering) [11, 12] and least squares (LS) criterion. ...
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RD Optimized, Adaptive, Error-Resilient Transmission of MJPEG2000-Coded Video over Multiple Time-Varying Channels
... New algorithms were proposed in [6] to find optimal so- lutions to uneven error protection problems involving scal- able source-coded bitstreams. It was shown in [6] that the complexity of their algorithm decreases ...
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Robust Adaptive OFDM with Diversity for Time Varying Channels
... In this paper, we propose a robust adaptive modulation scheme for OFDM with transmit and/or receive diversity. The scheme is based on the idea of using outdated estimates of the channel, as suggested in [12, 21], to ...
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An Approach for increasing SNR with varying data rate in OFDM transmission system
... In this paper our main attention is to reduce the BER while increasing the SNR for this work we increase the data rate to 32 point with 128- points IFFT and measured the BER. In section II processing blocks of ...
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