Performance Analysis of the Downlink CP-WCDMA System with Turbo Code in Frequency Domain

• DOI: 10.1007/s11277-014-1703-5
• Publication Date: 2014-04-03T08:19:34Z
• Authors: Abo Bakr Alzaroug; Belal A. Al-Fuhaidy; Moataz M. Salah; Gamal Hamad
• Keywords: Cyclic prefix; Turbo code; Spectral Efficiency; Turbo

Modern wireless communications require an efficient spectrum usage and high channel capacity and high throughput. Turbo code, linear equalizers, multi-user detection and wideband code-division multiple access (WCDMA) are possible solutions to achieve spectral efficiency, high channel capacity, eliminate MAI, eliminate ISI and robustness against frequency selective fading. In this paper, we combine all these techniques and investigate BER performance. We propose a low complexity receiver structure for Single-input Single-output downlink cyclic prefix CP-WCDMA systems. It employs frequency domain interference cancellation schemes to mitigate the interference caused by the multipath fading channel. Also, the proposed scheme is developed for the downlink Turbo code CP-WCDMA system to maximize the throughput of the proposed system.