Hybrid threshold combining and maximum ratio combining model for satellite communication over composite Rayleigh and Rician fading channel,International Journal of Satellite Communications and Networking

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Hybrid threshold combining and maximum ratio combining model for satellite communication over composite Rayleigh and Rician fading channel
International Journal of Satellite Communications and Networking ( IF 0.9 ) Pub Date : 2021-07-22 , DOI: 10.1002/sat.1419
Wasiu Akande Ahmed _{1,

2} , Falin Wu ₁ , Ganiy Ishola Agbaje ₂ , Muhammad Abdul Alim Sikder ₁ , Isaac Adewale Ojedokun ₃

Affiliation

Communication through satellite is of great task and importance especially in the world of telecommunication infrastructure. It plays a leading role for future communication systems. However, the performance of the satellite communication system is dominated by the channel conditions overwhelmed by multipath fading and ionospheric scintillation effects. Maximum ratio combining (MRC) previously used to tackle this problem is characterized with hardware complexity resulted in long processing time, while threshold combining (TC) with simple hardware display poor performance. Thus, evaluation of hybrid TC-MRC, with closed-form expression over composite Rayleigh and Rician fading channel is necessary. In this paper, TC and MRC are combined to improve the signal quality and performance. The data are modulated using M-ary quadrature amplitude modulation and transmitted over the combined effects. The received signals at varying paths are scanned to select the best paths. A mathematical expression using the probability density function of composite Rayleigh and Rician fading channel for mean integrated square error (MISE) is derived. The model is efficiently simulated and the performance is estimated. The results show that the hybrid TC-MRC model achieves lower MISE and processing time compared to threshold combiner and even maximum ratio combiner, and thereby enhance the performance of the satellite communication system.

中文翻译：

复合Rayleigh和Rician衰落信道卫星通信的混合门限合并和最大比合并模型

通过卫星进行通信具有重大的任务和重要性，尤其是在电信基础设施领域。它对未来的通信系统起着主导作用。然而，卫星通信系统的性能主要受多径衰落和电离层闪烁效应影响的信道条件的影响。以前用来解决这个问题的最大比率合并（MRC）的特点是硬件复杂导致处理时间长，而简单硬件的阈值合并（TC）表现不佳。因此，有必要评估混合 TC-MRC，在复合 Rayleigh 和 Rician 衰落信道上具有封闭形式的表达式。在本文中，将 TC 和 MRC 结合起来以提高信号质量和性能。数据使用 M 进制正交幅度调制进行调制，并通过组合效应传输。扫描不同路径的接收信号以选择最佳路径。推导了利用复合瑞利和赖斯衰落信道的概率密度函数计算均方积分平方误差(MISE)的数学表达式。该模型被有效地模拟并估计了性能。结果表明，与阈值合路器甚至最大比合路器相比，混合TC-MRC模型实现了更低的MISE和处理时间，从而提高了卫星通信系统的性能。推导了利用复合瑞利和赖斯衰落信道的概率密度函数计算均方积分平方误差(MISE)的数学表达式。该模型被有效地模拟并估计了性能。结果表明，与阈值合路器甚至最大比合路器相比，混合TC-MRC模型实现了更低的MISE和处理时间，从而提高了卫星通信系统的性能。推导了利用复合瑞利和赖斯衰落信道的概率密度函数计算均方积分平方误差(MISE)的数学表达式。该模型被有效地模拟并估计了性能。结果表明，与阈值合路器甚至最大比合路器相比，混合TC-MRC模型实现了更低的MISE和处理时间，从而提高了卫星通信系统的性能。

更新日期：2021-07-22

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