Patent ID: 7898936

Claim:
A multi-carrier transmitter for performing data transmission, said multi-carrier transmitter comprising: a first inverse fast Fourier transformer for performing an Inverse Fast Fourier Transform (IFFT) on a parallel input data signal; an imaginary component filter for filtering out the imaginary component of an output signal of the first inverse fast Fourier transformer; a real component filter for filtering out the real component of the output signal of the first inverse fast Fourier transformer; a first prototype filter comprising a polyphase filter having real coefficients, said first prototype filter accepting output data from said imaginary component filter; a second prototype filter comprising a polyphase filter having real coefficients which are selected by taking the real coefficients of the first prototype filter and inverting the sign of each odd-numbered real coefficient, said second prototype filter accepting output data from said real component filter; a modulator for performing Single Side Band (SSB) modulation by using the output from said first prototype filter as an in-phase signal of complex information and the output from the second prototype filter as an orthogonal signal of complex information; a first parallel-to-serial converter for converting the output of the first prototype filter from a parallel to a serial in-phase Inverse Wavelet Transform (IWT) signal; a second parallel-to-serial converter for converting the output of the second prototype filter from a parallel to a serial quadrature-phase Inverse Wavelet Transform (IWT) signal; and a third parallel-to-serial converter for converting the output of the first inverse fast Fourier transformer from a parallel to a serial data signal for Orthogonal Frequency Division Multiplexing (OFDM).