  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.
