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Rayleigh channels

A Receiver Structure for Frequency Flat Time Varying Rayleigh Channels and  Performance Analysis

A Receiver Structure for Frequency Flat Time Varying Rayleigh Channels and Performance Analysis

... In this paper, we present a wavelet based receiver for frequency-flat time-varying Rayleigh channels, consisting of two parts: a front-end stage and a Maximum A-Post- eriori (MAP) detector. Discretization ...

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PERFORMANCE COMPARISON OF BIT ERROR RATE FOR BPSK AND DS-BPSK FOR AWGN AND RAYLEIGH CHANNELS

PERFORMANCE COMPARISON OF BIT ERROR RATE FOR BPSK AND DS-BPSK FOR AWGN AND RAYLEIGH CHANNELS

... Rayleigh fading is statistical model which assumes that the magnitude of a signal that has passed through transmission medium will vary randomly, or fade according to Rayleigh distribution. It is most ...

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Rayleigh Fading Multi Antenna Channels

Rayleigh Fading Multi Antenna Channels

... Under the assumption of fast Rayleigh fading and per- fect channel knowledge at the receiver, various channel ca- pacity computations are carried out in Section 3.1. In partic- ular, we find simple bounds on ...

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Analysis of MIMO-WIMAX communication system under Rayleigh Fadding Channels using STBC

Analysis of MIMO-WIMAX communication system under Rayleigh Fadding Channels using STBC

... Abstract: Wireless access networks like WiMAX provide an excellent opportunity for operators to participate in the rapid growth opportunities that exist in emerging markets. The mobile Worldwide Interoperability for ...

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Performance analysis of relay selection in cooperative networks over Rayleigh flat fading channels

Performance analysis of relay selection in cooperative networks over Rayleigh flat fading channels

... fading Rayleigh channels, utilizing two-time slots using distributed space time block coding (STBC) or distributed beamforming (BF) are also investigated to exploit the channel ...

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Comparative analysis of Energy detection and Cyclostationary feature detection methods for AWGN, Rayleigh and Rician channels

Comparative analysis of Energy detection and Cyclostationary feature detection methods for AWGN, Rayleigh and Rician channels

... After implementing Energy detection and Cyclostationary feature detection in Simulink, it can be concluded that ED works well for AWGN in comparison with Rician and Rayleigh channels. Similarly CFD works ...

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Frequency estimation in multipath rayleigh-sparse-fading channels

Frequency estimation in multipath rayleigh-sparse-fading channels

... Abstract—Maximum-likelihood (ML) data-aided frequency estimation in multipath Rayleigh-fading channels with sparse impulse responses is investigated. We solve this problem under the assumption that the ...

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Performance comparison of multiuser detectors with channel estimation for flat Rayleigh fading CDMA channels

Performance comparison of multiuser detectors with channel estimation for flat Rayleigh fading CDMA channels

... Code Division Multiple Access (CDMA) is a promising technique for mobile communication systems. The major advantage of CDMA compared with Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA) ...

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Performance Evaluation of Wi-Fi and WiMAX Spectrum Sensing on Rayleigh and Rician Fading Channels

Performance Evaluation of Wi-Fi and WiMAX Spectrum Sensing on Rayleigh and Rician Fading Channels

... Spectrum Sharing: - When the licensed band is not used by the primary users so the property of providing those spectrum holes to the secondary users in the cognitive rad[r] ...

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Multiuser diversity in correlated Rayleigh fading channels

Multiuser diversity in correlated Rayleigh fading channels

... the channels correlation, although the rate reduction is ignorable in low correlation conditions (Figures 1 and ...the channels are not independent, the probability that one of the users has good channel ...

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Transmitter Diversity and Multiuser Precoding for Rayleigh Fading Code Division Multiple Access Channels

Transmitter Diversity and Multiuser Precoding for Rayleigh Fading Code Division Multiple Access Channels

... 4.096 Mcps chip rate, and the bit rate of 128 kbps [39]. Orthogonal codes are obtained using the tree structure, explained in [39]. We assume that there is no estimation error at the MS. The results are for a single user ...

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Performance of multiuser decision-feedback detector for flat Rayleigh fading synchronous CDMA channels

Performance of multiuser decision-feedback detector for flat Rayleigh fading synchronous CDMA channels

... We compare the decision-feedback detector with the conventional detector and the decorrelator. The average error rate of the conventional detector is evaluated using the result for distr[r] ...

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Novel Semi blind Channel Estimation Schemes for Rayleigh Flat Fading MIMO Channels

Novel Semi blind Channel Estimation Schemes for Rayleigh Flat Fading MIMO Channels

... trix triangularization based Householder QR decomposi- tion semi-blind channel estimation (first technique) and proposed QR decomposition based joint semi-blind cha- nnel and data estimation technique (second technique) ...

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Bi-Level Fh-Cdma Scheme For Communication Systems Over Rayleigh And Rician Channels

Bi-Level Fh-Cdma Scheme For Communication Systems Over Rayleigh And Rician Channels

... scheme is demonstrated for AWGN channel as well as Rayligh and Rician channels. The results of our system are compared with Goodman’s MFSK=FH-CDMA on the basis of data rate and spectral efficiency in the next ...

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Performance of MMSE STBC MC-CDMA over Rayleigh and MIMO METRA channels

Performance of MMSE STBC MC-CDMA over Rayleigh and MIMO METRA channels

... over Rayleigh channel, a gain of nearly 2 dB (for a BER=10 -3 ) compared to MMSE ...the Rayleigh channel are confirmed when the two channels are perfectly ...correlated channels with a ...

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Joint design of vector quantizers and RCPC channel codes for Rayleigh fading channels

Joint design of vector quantizers and RCPC channel codes for Rayleigh fading channels

... The VQ used in the iterative de- sign is a Channel-Optimized Vector Quantizer (COVQ) that has been optimized for the index crossover proba- bilities of the RCPC channel code desig[r] ...

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Latency and Networking Aspects of Adaptive Modems over Slow Indoors Rayleigh Fading Channels

Latency and Networking Aspects of Adaptive Modems over Slow Indoors Rayleigh Fading Channels

... The upper bound BER and bit per symbol (BPS) channel efficiency performance of such a scheme in a Rayleigh fading channel was given in [19]. These adaptive schemes need a reli- able transmission of the ...

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Bit Error Rate Analysis of OFDM System with Channel Estimation Error in Rayleigh Fading Channels

Bit Error Rate Analysis of OFDM System with Channel Estimation Error in Rayleigh Fading Channels

... Orthogonal frequency division multiplexing (OFDM) is a multi-carrier modulation scheme that maximizes the data transmission rate for a given bandwidth [1]-[3]. OFDM gives the frame work for the multi-user modulation ...

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Performance analysis of cognitive AF relay networks with multiuser switched diversity in Rayleigh fading channels

Performance analysis of cognitive AF relay networks with multiuser switched diversity in Rayleigh fading channels

... In this paper, we evaluated the performance of a cog- nitive CSI-assisted AF relay network with the MUSwiD user selection scheme. Closed-form approximations for the outage probability and average symbol error proba- ...

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Performance of a cooperative multiplexing scheme with opportunistic user and relay selection over Rayleigh fading channels

Performance of a cooperative multiplexing scheme with opportunistic user and relay selection over Rayleigh fading channels

... relay to obtain significant improvement in spectral effi- ciency. Cooperative multiplexing protocols [9-11] pro- posed in recent years help realize these promised gains through frequency reuse. In addition, they also help ...

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