scholarly journals High SNR BER Comparison of Coherent and Differentially Coherent Modulation Schemes in Lognormal Fading Channels

2014 ◽  
Vol 18 (9) ◽  
pp. 1507-1510 ◽  
Author(s):  
Xuegui Song ◽  
Julian Cheng ◽  
Mohamed-Slim Alouini
Keyword(s):  
Fading Channels ◽  
Modulation Schemes ◽  
Coherent Modulation

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.

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
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