time-frequency-selective channels
Identification of LOS in Time Varying, Frequency Selective Radio Channels
... of time consumption and computational ...observing time must be long enough; (b) the transmissions that have relatively weaker LOS component cannot be easily distinguished from other theoretical ...
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Parallel Multistage Decision Feedback Equalizer for Single Carrier Layered Space Time Systems in Frequency Selective Channels
... multiple-output OFDM (MIMO-OFDM) scheme [11] is a satisfactory solution not only to mitigate ISI but also to obtain high spectral efficiency. The MIMO decision feed- back equalizer (MIMO-DFE) [12] with its forward filter ...
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STC-Mimo Block Spread OFDM in Frequency Selective AWGN Channels
... Space Time code (STC), we multiply the symbols with the channel and then add white Gaussian noise to it, and then equalize the received ...wireless channels that may be time selective and ...
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Receivers and CQI Measures for MIMO-CDMA Systems in Frequency-Selective Channels
... We assume the coded VBLAST [8] scheme at the MIMO transmitter. In the coded VBLAST scheme, the coded frame is simply split across the M transmit antennas after modu- lation, therefore it can also be viewed as a simple ...
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Adaptive Zero Padding OFDM over Frequency Selective Multipath Channels
... Standard HIPERLAN/2 channel models [15] are used. The OFDM block size of 64 and a terminal speed of 3 m/s are assumed. The expected BW efficiency for different channel models ranges from 93%–100%, while employing CP- or ZP- ...
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Joint CFO Estimation and Data Detection in OFDM systems
... the time domain for OFDM systems over frequency selective fast fad- ing ...the frequency shift in fast fading channel cannot be separated as a constant from the channel impulse ...the ...
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A Low-Complexity Time-Domain MMSE Channel Estimator for Space-Time/Frequency Block-Coded OFDM Systems
... the frequency-selective channel into a set of flat fading subchannels, whereas space-time/frequency en- coding/decoding facilitates equalization and achieves perfor- mance gains by exploiting ...
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Cumulant-Based Automatic Modulation Classification Over Frequency-Selective Channels
... Our experiment comprised three phases: (i) collecting the feature data as discussed in Section III; (ii) constructing the KNN model; and (ii) comparing the predictive performance of the proposed model against different ...
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Equivalence of Linear MMSE Detection in DS CDMA and MC CDMA Systems over Time and Frequency Selective Channels
... Cases 1, 2, 3, and 4 discuss MC-DS-CDMA system behav- ior over TFS channels. The MC-DS-CDMA system in an FS (TS) channel experiences Case 1 (Case 2) since the channel is FS (TS) per basis waveform (so that the ...
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Power line communications over time-varying frequency-selective power line channels for Smart Home Applications
... Finally, the most significant problem of channel modelling for smart grid com- munications is the lack of narrowband channel models. Most of the channel models, especially top-down ones, are broadband channel models in ...
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Deterministic Modeling and Long Range Prediction of Fast Fading Channels with Applications to Mobile Radio Systems
... is time-variant, as we experience in wireless communication ...for time variant channels, to be adaptive to the time variations in the channel ...varying channels efficiently, but their ...
199
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 ...
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Space-Time Joint Interference Cancellation Using Fuzzy-Inference-Based Adaptive Filtering Techniques in Frequency-Selective Multipath Channels
... In the present paper, an adaptive robust MMSE array- receiver is proposed based on a fuzzy-logic controlled LMS or RLS algorithm for space-time joint asynchronous DS-CDMA signals. The FLC system is employed to ...
17
Rake Receiver Detection of Adaptive Modulation Aided CDMA over Frequency Selective Channels
... space, frequency or time diversity [11, Ch ...as frequency-diversity assisted ...combined frequency- and space-diversity assisted AQAM ...
5
Spectrally Efficient Communication over Time-Varying Frequency-Selective Mobile Channels: Variable-Size Burst Construction and Adaptive Modulation
... Algorithm 2 implements closed-loop metric signalling [3], and thus has a minimum latency of one fundamental burst. In other words, even without feedback delay, the met- ric estimated using the current burst is not used ...
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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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1. A robust and efficient channel estimation scheme for ofdm systems in frequency selective fading channels
... orthogonal frequency division multiplexing (OFDM) systems [1], a frequency selective (FS) channel is commuted into an accumulation of flat fading channels, which can be indemnified by simply ...
7
Diversity Techniques for Single Carrier Packet Retransmissions over Frequency Selective Channels
... multipath frequency-selective channels, hybrid automatic repeat request (HARQ) protocols are usually used in order to ensure data ...available time diversity in retransmission-based HARQ ...
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Blind CP OFDM and ZP OFDM Parameter Estimation in Frequency Selective Channels
... and frequency o ff sets do not a ff ect the power autocorrelation feature as the exponentials are canceled owing to the conjugate ...The time difference between two consecutive triangles is actually the symbol ...
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Performance of multicarrier complementary coded CDMA under frequency selective Nakagami m fading channels
... In CDMA, each user uses a unique code sequence that allows multiple users to share the system bandwidth. The codes used for CDMA should have low or zero cross-correlation in order to overcome multiple access interference ...
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