Comparison of CP-based single carrier and OFDM with power allocation

Existing performance comparisons of single-carrier (SC) and multicarrier transmission are mainly based on simulations. In this letter, we present a framework to compare the performance of cyclic prefix (CP)-based SC block transmission and orthogonal frequency-division multiplexing (OFDM) in frequency-selective fading channels. Minimum mean-squared error, equal-gain, and approximate minimum bit-error rate power-allocation schemes for CP-OFDM are considered. Performance of these methods is compared analytically and verified by simulations.