Classification of multiple M-ary frequency-shift keying signals over a Rayleigh fading channel

2002 ◽  
Vol 50 (6) ◽  
pp. 967-974 ◽  
Author(s):  
A.E. El-Mahdy ◽  
N.M. Namazi
Keyword(s):  
Frequency Shift ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channel ◽  
Frequency Shift Keying ◽  
Shift Keying

Performance of Binary Phase Shift Keying (BPSK) and Quartenary Phase Shift Keying (QPSK) Signalling Schemes in Fast and Frequency Non-Selective Rayleigh Fading Channel with a Decision Feedback Equalizer (DFE) at the Receiver

2009 ◽  
Vol 62-64 ◽  
pp. 99-104 ◽  
Author(s):  
T.I. Raji ◽  
Z.K. Adeyemo
Keyword(s):  
Phase Shift ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channel ◽  
Decision Feedback ◽  
Decision Feedback Equalizer ◽  
Phase Shift Keying ◽  
Binary Phase ◽  
Shift Keying ◽  
Binary Phase Shift Keying

In this paper, we study the performance of Binary phase shift keying (BPSK) and Quartenary phase shift keying (QPSK) modulation signalling over fast and frequency non-selective Rayleigh fading channel with mobile digital communication and usually a decision feedback equalizer (DFE) at the receiver. Mobile communication is generally a complex process in which the input modulated signals propagate to the receiver over many different paths resulting in what is known as multipath propagation. Its main effects are delay spread and Doppler spread. These effects result in the channel being classified as fast and frequency non selective. Performances in terms of Bit Error Rate (BER) with respect to the Signal-to-Noise Ratio (SNR) at different selected velocities of 10, 40, 70 and 100km/hr are investigated with Adaptive Equalizer. Simulation results are obtained using MATLAB 7.0 programming language. The results indicate that at all the velocities considered; there is an excessive degradation in the BER performance due to fading with both the BPSK and QPSK modulation schemes. However, the BER improves for BPSK modulation signalling scheme when a decision feedback equalizer is used at the receiver

scholarly journals PERFORMANCE ANALYSIS OF QUADRATURE CHAOS SHIFT

2020 ◽  
Vol 60 (1) ◽  
pp. 1-11
Author(s):  
Hesham Adnan Alabbasi ◽  
Izz Kadhum Abboud ◽  
Fadhil Sahib Hasan
Keyword(s):  
Fading Channel ◽  
Rayleigh Fading ◽  
Reference Signal ◽  
Data Rate ◽  
Rayleigh Fading Channel ◽  
Superior Performance ◽  
Experimental Simulation ◽  
Shift Keying ◽  
Simulation Results ◽  
Chaos Shift Keying

One of the most famous techniques of non-coherent differential chaos shift keying (DCSK) is Quadrature chaos shift keying (QCSK) system, this system suffered from lowering the data rate and increasing the bit energy during the bit transmission even though its rate doubling the one of the DCSK. Short reference (SR) algorithm is proposed for the QCSK system to design the SR-QCSK communication system that enhances these drawbacks. The main idea of the short reference technique is minimizing the length of the reference chaotic signal (β) at a transmitter by a factor P comparing to produce R samples for the new reference signal while the length of the information-bearing signal remained unchanged, this occurs by duplicating the reference signal P times to get the same length as the conventional QCSK. Therefore, the symbol duration is reduced from 2βTc to (R+β)Tc. The data rate and energy saving improvement factor in a percent form is derived and compared with the QCSK and DCSK systems. Also, the BER analytical expression is derived for the SR-QCSK in additive white Gaussian noise and Rayleigh fading channel. The experimental simulation results proved that the theory derivation gives a good analysis tracking for the BER performance. The SR-QCSK system is compared with other DCSK techniques and the simulation results show that it has a superior performance in the multipath Rayleigh fading channel.

scholarly journals Performance Analysis of SPSK with Dual Polarized Transmit Antennas over Rayleigh Fading Channel

2018 ◽  
Vol 1 ◽  
pp. 58-61
Author(s):  
Malarvizhi Subramani ◽  
Arumbu Vanmathi Neduncheran ◽  
Vijayakumar Ponnusamy
Keyword(s):  
Performance Analysis ◽  
Fading Channel ◽  
Error Probability ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channel ◽  
Extended Version ◽  
Shift Keying ◽  
Dual Polarized ◽  
Space Polarization ◽  
Dual Polarized Antenna

In this paper, the Space Polarization Shift Keying (SPSK) system, which is an extended version of Space Shift Keying (SSK) and includes both space and polarization dimensions with dual polarized antennas, is studied. The capacity and error probability analysis of SPSK for different polarization configurations are dealt with over the Rayleigh fading channel with a rich scattering environment. The analysis conducted shows that the SPSK with a dual polarized antenna (DP) offers better results than SPSK with a single orthogonal polarized antenna SPSK(SP), under non-LOS conditions. SPSK(DP) outperforms SSK by 4.2 dB over the correlated Rayleigh fading channel at 3 bits/s/Hz.

scholarly journals Jamming Impact on the Performance of MIMO Space Time Block Coding Systems over Multi-path Fading Channel

2013 ◽  
Vol 3 (1-2) ◽  
Author(s):  
Ehab M. Shaheen ◽  
Mohamed Samir
Keyword(s):  
Fading Channel ◽  
Rayleigh Fading ◽  
Broad Band ◽  
Space Time ◽  
Rayleigh Fading Channel ◽  
Time Block ◽  
Block Coding ◽  
Space Time Block Coding ◽  
Shift Keying ◽  
The Impact

The combined effect of broad/partial band jamming on the analysis performance of multi-input/multi-output (MIMO) space time block coding (STBC) systems over Rayleigh fading channel is often neglected in the literature. To this end, this paper investigates the impact of different kinds of jamming on the performance of MIMO STBC systems. Closed form expressions for the bit error probability (BEP) of the performance of binary phase shift keying (BPSK) STBC communication system over Rayleigh fading channel under the impact of both partial band and broad-band jamming for different number of transmitting and receiving antennas are presented. Computer simulations are provided to validate the theoretical developments. It has been found that the performance of such systems is severely deteriorated in the presence of strong jamming power (with a signal to jamming power ratio less than − 10dB) and the worst scenario occurs in the presence of broad-band jamming.

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