: Aiming at the problem of parameter estimation of orthogonal frequency division multiplexing (OFDM) signals with Alpha stable distributed noise, a joint estimation method of carrier frequency and symbol rate based on generalized cyclic spectrum is proposed in this paper. Firstly, the generalized cyclic spectrum mathematical model of OFDM is established by arctangent transformation and cyclostationary analysis of OFDM signals. Then, the relationship between the generalized cyclic spectral line and the carrier frequency and symbol rate of OFDM signal is analyzed, and the parameter estimation of OFDM signal is realized by detecting the position of generalized cyclic spectral line. Finally, the OFDM signal is collected by USRP, and the algorithm is verified by real acquisition of I and Q intermediate frequency signals. Experimental results show that the proposed algorithm has good robustness under Alpha stable distributed noise and has certain engineering practicability.