Low-Complexity Turbo Equalization for Alamouti Space-Time Block Coded EDGE Systems

— Enhanced Data Rates for Global Evolution (EDGE) based systems are expected to facilitate the same services as third generation WCDMA systems. This goal is achieved through physical layer enhancements to increase the data rate and spectral efficiency. Thus, it has become important to incorporate the recent advances in the physical layer. Recently, space-time block coding (STBC) has evolved as an effective transmit diversity technique. Convolutional channel coding is employed in EDGE systems. The combination of channel coding and STBC can be used to achieve high throughput over hostile wireless channels. On the other hand, turbo equalization can be employed in channel coded broadband wireless systems to further enhance the radio link performance. EDGE-based systems employ 8PSK highlevel modulation. Hence, maximum a posteriori (MAP)-based soft equalization is not suitable due to high complexity. Therefore, in this paper, we propose a low-complexity MMSE-based turbo equalization schem...

• Type: Conference
• Year: 2006
• Where: GLOBECOM
• Authors: K. C. B. Wavegedara, Vijay K. Bhargava
• Keywords: Channel Coding, Equalization, GLOBECOM 2006, Telecommunications , Turbo Equalization