An advanced empirical model for indoor wireless communication using fuzzy logic is presented based on an extensive measurement at the frequency of 1.8 GHz. The propagation environments are classified into three variables defined
as the input fuzzy sets namely, x1 is corridor width, x2 is % of wall area between transmitter and receiver, x3 is distance between receiver and breakpoint, and a variable defined as the output fuzzy sets namely, n is the pathloss exponent. The Crisp inputs are classified by fuzzifier to fuzzy sets and then inferenced using fuzzy rule base into fuzzy output. To have crisp output, this requires a method call ?defuzzifier? to extract a Crisp value that best suits
the path loss exponent output. The results have shown that fuzzy logic approach provides more accurate prediction of strength loss than that of
conventional models.