Unformatted text preview: different users based on the channel gains they perceive at any given time. Let c k,n represent the corresponding element of a K by N matrix of indicator variables. c k,n is 1 if subcarrier n is assigned to user k and 0 otherwise. [26] proved that the total data rate of the multiuser OFDMA system is maximized when a subcarrier is allocated to exactly one user during a given OFDM symbol period. To ensure that each subcarrier is allocated to exactly one user at a given time, c k,n is subject to the following constraints: c m , n = 1, ∀ n ∀ m ∑ and c m , n = N ∀ n ∑ ∀ m ∑ …(E15) Now that I have described the setup for the multiuser scenario, let us move onto the detailed discussion of MA and RA approaches....
View
Full Document
 Spring '09
 Prof
 Wireless communication, resource allocation algorithm

Click to edit the document details