Evaluation of BER of digital modulation schemes for AWGN and wireless fading channels

2015 ◽  
Author(s):  
Ben Ltaief Ahlem ◽  
Mohamed Bechir Dadi ◽  
Chibani Belgacem Rhaimi
Keyword(s):  
Fading Channels ◽  
Digital Modulation ◽  
Modulation Schemes

Performance Analysis of Digital Modulation Schemes Over Fading Channels

2021 ◽  
pp. 691-700
Author(s):  
Kamakshi Rautela ◽  
Sandeep Kumar Sunori ◽  
Abhijit Singh Bhakuni ◽  
Narendra Bisht ◽  
Sudhanshu Maurya ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Fading Channels ◽  
Digital Modulation ◽  
Modulation Schemes

scholarly journals Comparison of Bit Error Rate Performance of Various Digital Modulation Schemes over AWGN and Rayleigh Fading Channels using Simulink

2021 ◽  
Vol 9 (2) ◽  
pp. 7-16
Author(s):  
Md. Firoz Ahmed ◽  
Md. Faysal Ahmed ◽  
Abu Zafor Md. Touhidul Islam
Keyword(s):  
Fading Channels ◽  
Bit Error Rate ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channels ◽  
Rate Performance ◽  
Phase Shift Keying ◽  
Digital Modulation ◽  
Modulation Techniques ◽  
Shift Keying ◽  
Modulation Schemes

Digital modulation increases information capacity, data security, and system availability while maintaining high communication quality. As a result, digital modulation techniques are in higher demand than analog modulation techniques due to their ability to transmit larger amounts of data. Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), Differential Phase Shift Keying (DPSK), and Quadrature Amplitude Modulation (QAM) are critical components of current communications systems development, particularly for broadband wireless communications. In this paper, the comparison of bit error rate performance of different modulation schemes (BPSK, QPSK, and16-QAM) and various equalization techniques such as constant modulus algorithm (CMA) and maximum likelihood sequence estimate (MLSE) for the AWGN and Rayleigh fading channels is analyzed using Simulink. BPSK outperforms QPSK and 16-QAM when compared to the other two digital modulation schemes. Among the three digital modulation schemes, BPSK is showing better performance as compared to QPSK and 16-QAM.

The Study of Coded CPM Schemes

2012 ◽  
Vol 198-199 ◽  
pp. 1408-1412
Author(s):  
Lin Bo Su ◽  
Jian Hua Chen ◽  
Ying Peng Hu
Keyword(s):  
Fading Channels ◽  
Convolutional Codes ◽  
Continuous Phase ◽  
Coded Modulation ◽  
Superior Performance ◽  
Continuous Phase Modulation ◽  
Codes Over Rings ◽  
Constant Envelope ◽  
Modulation Schemes ◽  
Serially Concatenated

Continuous Phase Modulation (CPM) schemes belong to a class of constant-envelope digital modulation schemes, the constant-envelope nature of the CPM signals makes them robust for the nonlinear and fading channels, and very useful for the satellite and/or the mobile radio channels. Comparing to PSK modulation, CPM modulation can not only provide spectral economy, but also exhibit a “coding gain”. CPM can be decomposed into a Continuous Phase Encoder (CPE) followed by a Memoryless Modulator (MM), this allows many new coded modulation schemes of combination of convolutional encoder and CPM modulator to be possible, such as serially-concatenated CPM (SC-CPM), SC-CPM with Convolutional Codes over Rings, pragmatic CPM (P-CPM), Concatenation of convolutional endocder and extended CE（CCEC）, etc. Some simulations show that these new CPM schemes can offer superior performance.

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