A Fast Power Allocation Strategy for OFDM Systems

A novel ICI self‐cancellation scheme for OFDM systems

“…The OFDM systems considered in this paper do not consider power allocation among OFDM subcarriers such as [8]. However, the corresponding modification is straightforward.…”

“…We compare the CIR of the conventional scheme in (8) Figure 2, the numerator of (23) minus the numerator (8) is larger than the denominator of (23) minus the denominator of (8). Hence overall the symmetric scheme has bigger CIR in (23) than the conventional scheme in (8).…”

“…Here, we explain why symmetric scheme outperforms the conventional scheme (no explanation given in [7]) in an intuitive way. We compare the CIR of the conventional scheme in (8) and the CIR of the symmetric scheme in (23). Note that the S(l −k) is a sinc function as shown in Figure 2, so S(1) and S(−1) are significantly bigger than S(N −1) and S (1− N ).…”

“…The denominator in (23) for the symmetric scheme, N +1), is slightly bigger than the denominator in (8) for the symmetric scheme, 2S(l)− S(l +1)− S(l −1). ‡ Due to the function S being a sinc function as shown in Figure 2, the numerator of (23) minus the numerator (8) is larger than the denominator of (23) minus the denominator of (8). Hence overall the symmetric scheme has bigger CIR in (23) than the conventional scheme in (8).…”