Title :
Performance Analysis of an OFDMA Transmission System in a Multicell Environment
Author :
Gault, Sophie ; Hachem, Walid ; Ciblat, Philippe
Author_Institution :
Telecommun. Dept., Supelec, Gif-sur-Yvette
fDate :
4/1/2007 12:00:00 AM
Abstract :
The paper deals with design and performance analysis of orthogonal frequency-division multiple-access (OFDMA)-based downlink cellular wireless communications. Due to a high degree of user mobility, the base station is assumed to have only a statistical knowledge of the users´ channels. Relying on the ergodic capacities connected to the user rates, a subcarrier and power allocation that minimizes the total transmitted power is proposed. The allocation strategy requires only the knowledge of the channel statistics and the rate requirements for all users. An extension and a performance analysis of this allocation algorithm in a multicell environment working with a frequency reuse factor equal to one is also conducted. A condition for the multicell network to be able to satisfy all rate requirements is derived
Keywords :
cellular radio; frequency division multiple access; radio links; statistics; wireless channels; OFDMA transmission system; channel statistics; downlink cellular wireless communications; ergodic capacities; frequency reuse factor; multicell environment; orthogonal frequency-division multiple-access; power allocation; user mobility; Base stations; Downlink; Frequency division multiaccess; Interference; OFDM modulation; Performance analysis; Radio spectrum management; Statistics; Transfer functions; Wireless communication; Ergodic capacity; frequency-hopping (FH); multicell interference (MCI); orthogonal frequency-division multiple access (OFDMA); power and subcarrier allocation;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2007.894101
