Performance Analysis of Optimum Interleaver based on Prime Numbers for Multiuser Iterative IDMA Systems

2012 ◽  
pp. 212-226
Author(s):  
M. Shukla ◽  
Ruchir Gupta
Keyword(s):  
Performance Analysis ◽  
Multiple Access ◽  
Prime Numbers ◽  
Optimal Performance ◽  
Memory Requirement ◽  
Signature Sequences ◽  
Probability Of Collision ◽  
Minimum Probability ◽  
Simulation Results ◽  
Minimal Consumption

In recently proposed multiple access techniques like IDMA and OFDM-IDMA, the user separation is done by user specific interleavers in contrast to the conventional CDMA scheme, where user separation is assured with user-specific signature sequences. The user specific interleavers must demonstrate minimum probability of collision amongst each other in addition to other merits, including minimal consumption of bandwidth, least hardware for their generation, and least memory requirement. In this paper, the authors propose an interleaver based on prime numbers for the generation of user specific interleavers to remove the problem of high consumption of bandwidth. The simulation results demonstrate the optimal performance of prime interleaver (PI), which is based on prime numbers, apart from other merits in comparison to random and other interleavers.

Performance Analysis of Optimum Interleaver based on Prime Numbers for Multiuser Iterative IDMA Systems

2010 ◽  
Vol 2 (3) ◽  
pp. 51-65 ◽  
Author(s):  
M. Shukla ◽  
Ruchir Gupta
Keyword(s):  
Performance Analysis ◽  
Multiple Access ◽  
Prime Numbers ◽  
Memory Requirement ◽  
High Consumption ◽  
Signature Sequences ◽  
Probability Of Collision ◽  
Minimum Probability ◽  
Simulation Results ◽  
Minimal Consumption

In recently proposed multiple access techniques like IDMA and OFDM-IDMA, the user separation is done by user specific interleavers in contrast to the conventional CDMA scheme, where user separation is assured with user-specific signature sequences. The user specific interleavers must demonstrate minimum probability of collision amongst each other in addition to other merits, including minimal consumption of bandwidth, least hardware for their generation, and least memory requirement. In this paper, the authors propose an interleaver based on prime numbers for the generation of user specific interleavers to remove the problem of high consumption of bandwidth. The simulation results demonstrate the optimal performance of prime interleaver (PI), which is based on prime numbers, apart from other merits in comparison to random and other interleavers.

Gradient Descent Optimization Algorithms for Decoding SCMA Signals

2020 ◽  
pp. 2150002
Author(s):  
Sergio Vidal-Beltrán ◽  
José Luis López Bonilla ◽  
Fernando Martínez Piñón ◽  
Jesús Yalja-Montiel
Keyword(s):  
Machine Learning ◽  
Neural Networks ◽  
Deep Learning ◽  
Wireless Communications ◽  
Performance Analysis ◽  
Multiple Access ◽  
Gradient Descent ◽  
Optimization Algorithms ◽  
Sparse Code ◽  
Simulation Results

Recently, technologies based on neural networks (NNs) and deep learning have improved in different areas of Science such as wireless communications. This study demonstrates the applicability of NN-based receivers for detecting and decoding sparse code multiple access (SCMA) codewords. The simulation results reveal that the proposed receiver provides highly accurate predictions based on new data. Moreover, the performance analysis results of the primary optimization algorithms used in machine learning are presented in this study.

Performance Analysis of OQPSK Signals with Bi-Kappa Noise for Wireless Sensor Networks

2013 ◽  
Vol 330 ◽  
pp. 957-960
Author(s):  
Qiao Ling Du ◽  
Zhi Rui Wang ◽  
Yu Pei ◽  
Yi Ding Wang
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Performance Analysis ◽  
Error Rate ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Symbol Error Rate ◽  
Wireless Sensor ◽  
Channel Simulation ◽  
Simulation Results

This paper investigates the performance analysis of OQPSK in HF band for wireless sensor networks. An analytical model for getting symbol error rate (SER) is given in presence of Bi-Kappa noise in HF band. And the SER of OQPSK is given in AWGN and Rayleigh fading channel. Simulation results HF noise as Bi-Kappa noise should be investigated in HF band for WSN.

scholarly journals 2 Performance Evaluation of Code Division Multiple Access (CDMA) in terms of Power Measurement and Reduction

2011 ◽  
Vol 1 (1) ◽  
pp. 4
Author(s):  
Syed Rizwan-ul- Hasan ◽  
Shakil Ahmed
Keyword(s):  
Performance Evaluation ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Average Power ◽  
Power Measurement ◽  
Cdma System ◽  
Power Ratio ◽  
Ratio Measurement ◽  
Simulation Results ◽  
Code Division Multiple

 In this research paper the performance of the CDMA system has been analyzed with respect to PAPR (Peak to Average Power Ratio) measurement and its reduction. Simulation results verify that high peaks degrade the performance of CDMA, application of codes reduced high peaks and PAPR is a good measure for CDMA.

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