In this paper the symbol error performance of LoRa modulation is addressed for flat Rician block fading channels. First the exact symbol error probability of the LoRa modulation on Rician fading is derived. Then the upper and lower union bounds are employed on the derived symbol error probability. The proposed bounds are compared against the exact symbol error probability, the numerical evaluation of the symbol error probability and the state-of-art approximation of the LoRa symbol error probability. Numerical results show that while the proposed upper bound is very tight to the exact symbol error probability, there is approximately a 2.5 dB gap for the lower bound.

翻译：本文针对平坦Rician块衰落信道下的LoRa调制符号错误性能进行研究。首先推导了Rician衰落条件下LoRa调制的精确符号错误概率，随后在所推导的符号错误概率上应用了上、下联合界。本文提出的界与精确符号错误概率、符号错误概率的数值评估以及当前最先进的LoRa符号错误概率近似值进行了比较。数值结果表明，虽然本文提出的上界与精确符号错误概率非常接近，但下界存在约2.5 dB的差距。