The performance deterioration from nonlinear amplifier in NxDO system

ABSTRACT

Recently, 3gpp2 is discussing cdma2000 EV/DO Rev.B which supports using several independent 1x carriers together. By this way, the system occupies wider bandwidth and provides higher data rate to users. However, multi-carrier signal needs higher transmit power and has inconstant amplitude. That means amplifier may operating in a nonlinear region and result in signal distortions. This paper introduces a nonlinear amplifier model from others and studies the NxDO reverse link performance deteriorations from non-linearity under AWGN channel.

REFERENCES

• 1: TIA-856-A, "cdma2000 High Rate Packet Data Air Interface Specification", Apr, 2004
• 2: K.Schneider, W.Tranter, "Efficient Simulation of Multicarrier Digital Communication Systems in Nonlinear Channel Environments", IEEE JSAC, Vol.11, No.3 April 1993, pp. 328--339.
• 3: Sourour, E.A, "The effect of non-linearity on the performance of the multi-carrier CDMA system", IEEE VTC 1996 Volume 3, 28 April - 1 May 1996 Page(s):1853--1857 vol.3
• 4: J.Boccuzzi, "Performance evaluation of non-linear transmit power amplifiers for north American digital cellular portables," IEEE Trans. Veh. Tech, Vol. 44, No.2, May 1995, pp.220--228.
• 5: L.Chen, S.Ikuta, M.Kominami and H.kusaka, "An analysis of non-linear distortion due to TWT in asynchronous DSSSMA communication systems,"IEEE International Symposium on Spread Spectrum techniques and applications, ISSS 94, Oulu, Finland, July406, 1994,pp. 297--302.
• 6: Sala. J, "Conditional entropy based coarse time delay estimation in the presence of AM/AM and AM/PM nonlinearities", Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03), 6--10 April 2003, vol.4 , pp. 584--7
• 7: M.Faulkner and M.Johansson, "Adaptive linearization using predistortion - experimental results," IEEE Trans. Veh. Tech. Vol.43, No.2, May 1994, pp.323--332
• 8: Rodrigues, M.R.D, MitChell. J.E, Darwazeh. I, "On the error probability performance of non-linearly distorted OFDM signals", IEEE VTC 2003-Spring, 22--25 April, 2003, vol.2,pp. 1278--1282.
• 9: CCSA-TSD-MC-C.R1002-0, "cdma2000 Evaluation Methodology" Jan, 2005

INDEX TERMS

Primary Classification:
  I. Computing Methodologies
  I.6 SIMULATION AND MODELING
      I.6.8 Types of Simulation
          Subjects: Monte Carlo

General Terms:
Performance, Standardization

Keywords:
amplifier, multi-carrier, non-linearity, system performance