Title :
Effects of nonlinear distortion on CDMA communication systems
Author :
Chen, Seng-Woon ; Panton, William ; Gilmore, Robert
Author_Institution :
Qualcomm Inc., San Diego, CA, USA
fDate :
12/1/1996 12:00:00 AM
Abstract :
We report a rigorous approach to analyze the effects of nonlinear distortion on code division multiple access (CDMA) wireless communication systems based on time-domain analysis and band-pass nonlinearity theory. Given AM-AM and AM-PM characteristics of a nonlinear device, this technique is capable of predicting adjacent channel power rejection (ACPR), noise power ratio (NPR), two-tone intermodulation products, CDMA waveform quality, and baseband signal vector constellation at the output of the nonlinear device. To demonstrate and verify the capability of this technique, an L-band power amplifier was designed, built, tested with CDMA waveforms, and compared with the simulated results. Excellent agreement between the measured and predicted results has been achieved
Keywords :
code division multiple access; intermodulation distortion; time-domain analysis; AM-AM characteristics; AM-PM characteristics; CDMA; L-band power amplifier; band-pass nonlinearity theory; baseband signal vector constellation; channel power rejection; code division multiple access; noise power ratio; nonlinear device; nonlinear distortion; time-domain analysis; two-tone intermodulation product; waveform quality; wireless communication system; Baseband; Communication systems; Constellation diagram; L-band; Multiaccess communication; Nonlinear distortion; Power amplifiers; Signal to noise ratio; Time domain analysis; Wireless communication;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
