Coded orthogonal frequency division multiplex [TV broadcasting]

A comparison of CP-OFDM with IOTA-OFDM under typical system imperfections

“…Cm,n is the symbol transmitted on the m th subchannel during the nth symbol period and N is the number of subchannels. The IOTA function, (m,n, is obtained 2-1 e-1rt2 /2T; in both time and frequency using the methods presented in [6], [11]. Following [11], in the Appendix we provide a method to derive the necessary coefficients for computing the IOTA function.…”

“…The IOTA function, (m,n, is obtained 2-1 e-1rt2 /2T; in both time and frequency using the methods presented in [6], [11]. Following [11], in the Appendix we provide a method to derive the necessary coefficients for computing the IOTA function. The IOTA function allows a subchannel spacing of half the symbol rate…”

“…Note that the coefficients of the pulse shaping filter obtained using (11) and (12) ensure the orthogonality between two adjacent time or frequency symbols. Hence, at the receiver, we can recover the transmitted symbols.…”

“…Using the method presented in [9], [11] the coefficients for the orthogonal pulse 90 (t) can be obtained. The Gaussian pulse, 9(t), is orthogonalized using,…”

“…In order to overcome the problems associated with conventional OFDM, the IOTA approach has been proposed [9], [10], [11]. OFDM/OQAM employing IOTA, as in [4], [5], [6], [7], is a unique approach.…”