A New Radio Access Scheme based on CDMA for B3G Wireless Communications
a new scenario of multiple access technology for beyond 3G wireless communications named CDD- dualCDMA is proposed. CDD (code-division duplex) is a method to improve the spectrum efficiency by adding smart codes into time-division duplex (TDD) technology. The concept of dual-CDMA (dual-code division multiple access) is dividing traffic channels by both LAS (large area synchronous) codes and LS (loosely synchronous) cods, in order to eliminate inter-symbol interference (ISI) and multiple access interference (MAI). At the same time, the problem that the number of available smart codes is limited could also be solved. In the paper, the performance of CDD- dual-CDMA is analyzed. The result of simulation shows that BER (bit error rate) performance of CDD- dual-CDMA is much better than traditional random codes. Additionally, CDD- dualCDMA scenario is a flexible scheme, and can be used for improvement of TD-SCDMA system. Therefore, CDD- dual-CDMA scenario is more suitable for the future mobile communications.
wireless communication radio access CDMA B3G
Yi Zhang Qi Liu LanXie
School of Photoelectric Information & Communication Engineering,Beijing Information Science and Tech Department of Electronic Engineering,Tsinghua University,Beijing,China Beihang University,Beijing China
国际会议
2009 First International Conference on Future Information Networks(第一届未来信息网络国际会议)
北京
英文
184-187
2009-10-14（万方平台首次上网日期，不代表论文的发表时间）