A method to provide increased robustness against noise and interference in wireless communications, comprising: sending, by a transmitter, to a receiver, through a wireless channel, information using a constant-envelope waveform with complex baseband representation of the form s [ n]= A c exp{ jφ [ n]}, denoted as FM-OFDM waveform, said phase φ [ n] following the expression φ n − φ n − 1 = 2 πm. ∑ k = k 0 + 1 k 0 + N a, FM + − 1 x k exp j 2 πkn N, where N is the FFT length, k 0 is a cutoff subcarrier above which the information x[k] is mapped, N a, FM + is the number of active positive subcarriers, and A c and m are real constants, aimed at protecting the information against noise, Doppler, phase noise and carrier frequency offset impairments, wherein said wireless channel has an Additive White Gaussian Noise component and flat-fading conditions; wherein before sending, the method further comprises: calculating, by the transmitter, the cutoff subcarrier k 0 that is needed to overcome Doppler, phase noise and carrier frequency offset impairments at the receiver side; choosing, by the transmitter, the FFT length, N, high enough to allow working in the low-noise region of the instantaneous frequency spectrum; calculating, by the transmitter, for the chosen FFT length, N, the number of active positive subcarriers, N a, FM +, that are needed in order to have a given improvement in the signal to noise ratio at the active positive subcarriers of the instantaneous frequency spectrum containing the information, based on the following noise reduction η N a, FM + = 1 N a, FM + ∑ k = k 0 + 1 k 0 + N a, FM + 1 − cos 2 πk N, and generating, by the transmitter, the complex baseband representation of the form s [ n]= A c exp{ jφ [ n]} carrying the desired information with the chosen FFT length, number of active positive subcarriers and cutoff subcarrier. sending, by a transmitter, to a receiver, through a wireless channel, information using a constant-envelope waveform with complex baseband representation of the form s [ n]= A c exp{ jφ [ n]}, denoted as FM-OFDM waveform, said phase φ [ n] following the expression φ n − φ n − 1 = 2 πm. ∑ k = k 0 + 1 k 0 + N a, FM + − 1 x k exp j 2 πkn N, where N is the FFT length, k 0 is a cutoff subcarrier above which the information x[k] is mapped, N a, FM + is the number of active positive subcarriers, and A c and m are real constants, aimed at protecting the information against noise, Doppler, phase noise and carrier frequency offset impairments, wherein said wireless channel has an Additive White Gaussian Noise component and flat-fading conditions; wherein before sending, the method further comprises: calculating, by the transmitter, the cutoff subcarrier k 0 that is needed to overcome Doppler, phase noise and carrier frequency offset impairments at the receiver side; choosing, by the transmitter, the FFT length, N, high enough to allow working in the low-noise region of the instantaneous frequency spectrum; calculating, by the transmitter, for the chosen FFT length, N, the number of active positive subcarriers, N a, FM +, that are needed in order to have a given improvement in the signal to noise ratio at the active positive subcarriers of the instantaneous frequency spectrum containing the information, based on the following noise reduction η N a, FM + = 1 N a, FM + ∑ k = k 0 + 1 k 0 + N a, FM + 1 − cos 2 πk N, and generating, by the transmitter, the complex baseband representation of the form s [ n]= A c exp{ jφ [ n]} carrying the desired information with the chosen FFT length, number of active positive subcarriers and cutoff subcarrier. calculating, by the transmitter, the cutoff subcarrier k 0 that is needed to overcome Doppler, phase noise and carrier frequency offset impairments at the receiver side; choosing, by the transmitter, the FFT length, N, high enough to allow working in the low-noise region of the instantaneous frequency spectrum; calculating, by the transmitter, for the chosen FFT length, N, the number of active positive subcarriers, N a, FM +, that are needed in order to have a given improvement in the signal to noise ratio at the active positive subcarriers of the instantaneous frequency spectrum containing the information, based on the following noise reduction η N a, FM + = 1 N a, FM + ∑ k = k 0 + 1 k 0 + N a, FM + 1 − cos 2 πk N, and generating, by the transmitter, the complex baseband representation of the form s [ n]= A c exp{ jφ [ n]} carrying the desired information with the chosen FFT length, number of active positive subcarriers and cutoff subcarrier.