A geometric approach for turbo decoding of reed-solomon codes in QAM modulation schemes

2009 ◽  
Vol 13 (5) ◽  
pp. 333-335 ◽  
Author(s):  
Cristhof J. Roosen Runge ◽  
Jose Roberto C. Piqueira
Keyword(s):  
Geometric Approach ◽  
Turbo Decoding ◽  
Reed Solomon Codes ◽  
Qam Modulation ◽  
Modulation Schemes

Comparative Analysis of QAM Modulation Techniques over AWGN and Fading Channels

2021 ◽  
Vol 107 ◽  
pp. 194-200
Author(s):  
Theman Ibrahim Jirnadu ◽  
Adeyemi Abel Ajibesin ◽  
Ahmed T. Ishaq
Keyword(s):  
Fading Channels ◽  
Bit Error Rate ◽  
Error Rate ◽  
Signal To Noise Ratio ◽  
Research Work ◽  
Noise Spectral Density ◽  
Energy Consumption Optimization ◽  
Qam Modulation ◽  
Efficient Scheme ◽  
Modulation Schemes

Although, most researchers focus on some of the key components of good digital wireless communications which are the Bit Error Rate (BER) versus Signal to Noise Ratio (SNR) of modulation schemes. Energy consumption optimization is necessary for enhancing the performance of a wireless communication system as it offers numerous advantages to the system and the users. Therefore, this research focuses on analyzing the efficiency in the performance of the various QAM Modulation Schemes (4QAM, 16QAM, 32QAM & 64QAM) as they travel over noise/fading channels with the quest to obtain an energy-efficient scheme which will enhance system performance in terms of system runtime and quality of service. The efficiency of any given process, operation, or device is rated per the energy it consumes in carrying out an activity per unit output. Hence, the objective of this research work is to study and analyze comparatively the efficiency of these modulation schemes and to conclude with the most efficient scheme over the various channels. The evaluation of the Bit Error Rate (BER) versus energy per bit to noise spectral density (EbNo) for each communication scenario was carried out in MATLAB.

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