Maximum total ergodic spectral efficiency of randomly-spread coded-CDMA with linear multiuser receivers over multipath fading channels


Ertug Z., Unal B., Baykal B. , Yucel M.

IEEE Global Telecommunications Conference (GLOBECOM 03), San-Francisco, Costa Rica, 1 - 05 December 2003, pp.1568-1572 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/glocom.2003.1258501
  • City: San-Francisco
  • Country: Costa Rica
  • Page Numbers: pp.1568-1572

Abstract

We analyze the total ergodic spectral efficiency and sum-rates error-exponents of randomly-spread CDMA systems with diversity-combining linear multiuser receivers over time-varying frequency-selective multipath Rayleigh/Ricean fading channels. The basis of our analysis mainly being the joint/average eigenvalue density of the random cross-correlation matrices, our focus is on equal-rate/equal-energy identical users with statistically i.i.d. channels. The upper-bound ergodic spectral efficiency and the corresponding sum-rates error-exponent expressions are derived in closed-form in terms of the key system parameters for linear multiuser receivers with single-user ML decoding. The analysis sheds light onto asymptotic behaviour of channel-coded wideband CDMA systems over multipath fading channels.