Minimum word-length requirements for MIMO-OFDM

The first step in the design and implementation of a MIMO-OFDM system is to analyze the characteristics of the baseband modulated signal. This is crucial in order to minimize the complexity of the digital signal processing. This paper demonstrates the generalized derivation of the minimum word-length requirements for the main data-path in OFDM systems based on the analytical evaluation of the normalized power distribution, clipping noise effect, and essential dynamic range. We have formulated the minimum word-length requirements for the main data path in both transmitter and the receiver. The theoretical analyses are also supported by system level simulations.