Impact of carrier frequency dependent power amplifier behavior on 802.11a WLAN system

A revealing new study is presented on the impact of frequew-related Performance variation of Power amplifiers (PAS) for 802.11a WLAN systems. A look-up table (LUT) model that addresses such, so called, memory effects was developed for an example PA and used to study frequency dependent non-linear effects on WLAN system performance parameters, such as spectral reerowth (e.g. ACPR) and error vector magnitude (EVM). The results show significant frequency-dependent variations in these critical system parameters and underline the importance of memory-effect modeling for PAS used in OFDM WLAN systems.