This paper proposes the application of traditional blind, adaptive algorithms to the per tone structure for equalization in multicarrier receivers. It is shown that the per tone structure lends itself more readily than the TEQ structure to the application of the Constant Modulus Algorithm (CMA) and Decision-Directed LMS (DD-LMS). The result is that CMA and DD-LMS type algorithms can be derived for the per tone structure, resulting in low-complexity multicarrier equalization algorithms that are both blind and adaptive.
The CM cost function is derived, and the effect of the symbol synchronization on the cost function is explored. Simulations are used to compare the performance of CMA and DD-LMS to the optimal solution (as derived by Van Acker, et al.), and to illustrate the situations in which these algorithms excel or falter.