Optimal Bit and Power Loading for OFDM Systems With Average BER and Total Power Constraints
Orthogonal Frequency Division Multiplexing (OFDM) modulation represents a robust and efficient transmission technique being adopted by several wireless communication standards. The OFDM system performance can be significantly improved by dynamically adapting the transmission parameters, such as power, constellation size, symbol rate, and coding rate/scheme, according to the channel conditions and the wireless standard specifications. Bit and power loading algorithms can be generally categorized into two main classes, i.e., algorithms whose objective is to maximize the achievable system margin, Margin Maximization (MM) and algorithms whose objective is to maximize the achievable data rate, Rate Maximization (RM).
Provided by: Memorial University of Newfoundland Topic: Mobility Date Added: Nov 2012 Format: PDF