Improvement of Memory Effects and ACPR of Power Amplifiers in CDMA Cellular Mobile and OFDM WLAN Transmitters
In this paper, improvement of the memory effects and adjacent channel interference introduced by the nonlinearity of the power amplifier in the both Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing based (OFDM) transmitters is evaluated through feedforward linearization method. For CDMA system, more than 17.27dB increasing in OIP3 is and at least 25dB improvement in Adjacent Channel Power Ratio (ACPR) is obtained. For OFDM system, achieved improvement through feedforward linearization method is at least 39.03dB in Third Output Intercept Point (OIP3), more than 26.6dB in ACPR and 5.44dB in peak-to-average ratio.
Provided by: International Journal on Electrical Engineering and Informatics (IJEEI) Topic: Mobility Date Added: Sep 2013 Format: PDF