Title :
The effect of cellular portable unit amplifier non-linearity on the performance of the multi-carrier CDMA system
Author :
Sourour, Essam A.
Author_Institution :
Fac. of Eng., Alexandria Univ., Egypt
Abstract :
A number of multi-carrier CDMA systems have been introduced as alternatives for the conventional single carrier CDMA system. Multi-carrier modulation offers many advantages over single carrier modulation in fading channels, impulsive noise and for high data rate applications. With the availability of fast DSP technology multi-carrier modulation is feasible. A major problem in multi-carrier systems is the inter-modulation distortion due to the non-linearity of the power amplifier stage. Since the multi-carrier signal has a large amplitude variation it is subject to AM/AM and AM/PM distortion due to power amplifiers. This distortion adds to the co-channel interference and causes a significant degradation to the system performance. This paper studies the performance of the multi-carrier CDMA system in an AWGN channel without fading but with amplifier non-linearity
Keywords :
Gaussian channels; cellular radio; cochannel interference; code division multiple access; intermodulation distortion; land mobile radio; mobile radio; modulation; power amplifiers; pseudonoise codes; radiofrequency interference; spread spectrum communication; AM/AM distortion; AM/PM distortion; AWGN channel; DS-CDMA system; cellular portable unit; cochannel interference; fading channels; fast DSP technology; high data rate application; impulsive noise; intermodulation distortion; large amplitude variation; multicarrier CDMA system performance; multicarrier modulation; multicarrier signal; power amplifier nonlinearity; system performance degradation; Additive white noise; Degradation; Digital signal processing; Distortion; Fading; Gaussian noise; Interchannel interference; Multiaccess communication; Power amplifiers; System performance;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563614
