Design of Simplified Overlapped Code Division Multiplexing System
In order to reduce the high complexity of overlapped code division multiplexing (OvCDM) system, a novel simplified OvCDM (S-OvCDM) system with constraint length 1 is proposed in the paper. With reduced constraint length, system complexity is greatly reduced and bit error rate (BER) analysis is simplified. Design criteria of the novel system is set up based on its equivalence to bit interleaved coded modulation with iterative detection (BICM-ID). Novel encoding matrices are given for system with spectral efficiency greater than 4 bits/complex dimension. Furthermore, with optimized labeling strategy, the novel scheme achieves even earlier Turbo cliff than normal OvCDM system. Numerical experiments show the effectiveness of the new scheme.
coded modulation OvCDM BICM-ID labeling strategy.
Peng Sun Daoben Li Li Fang
Beijing University of Posts and Telecommunications, Beijing, China
国际会议
南京
英文
1-6
2011-11-09（万方平台首次上网日期，不代表论文的发表时间）