Study on performance of High Altitude Platform Systems over a shadowed Rician fading channel

摘要

In this paper, we present the research results on design and evaluating performance of channel codes used in High Altitude Platform (HAP) systems over a shadowed Rician fading channel. The shadowed Rician channel is a generalization of the Rician model, where the amplitude of the line-of-sight component is subjected to the complete or partial blockage by buildings, trees, hills, mountains, etc., and is characterized by the Nakagami distribution. To achieve better performance, we use and design a Irregular Convolutional Code (IrCC) to approach the Discrete-input Continuous-output Memoryless Channel (DCMC) capacity with a given code rate and modulation method. Therefore, DCMC capacity for HAP systems over a shadowed Rician fading channel must be calculated. These capacity curves establish an upper bound that performance of HAP systems using channel codes is expected to reach. Furthermore, we also evaluate performance on Bit Error Rate (BER) of the HAP system using the designed channel codes.