The DSP implementation of the LINC amplifier to improve ACPR and imbalance performance

This paper is projected towards improving the adjacent channel power ratio (ACPR) for LInear amplification using Nonlinear Component (LINC) power amplifiers in OFDM based wireless systems using digital baseband filtering for branch signals. The IEEE802.11g standard, which operates at 2.4 GHz, is used to show the amount of improvement. Results show that the ACPR is improved using a least square filter, from −26.1dBc to −63.8dBc, without deteriorating the overall system power efficiency.