Realization of Share Downlink Carrier between CDMA2000 1x and 1x EV-DO

In order to realize the wireless access with big capacity and multi-user, 1x EV-DV was proposed by 3GPP2. However, according to our analysis of the CDMA-system capacity, we conclude that the technology of blinding channel and variable modulation, which is adopted in 1x EV-DV, are unreasonable and can not support high-speed data server. Base on these analyses, we propose a CDMD/TDMA reform scheme, which can support CDMA2000 1x and 1x EV-DO compatible working on a share carrier. In the reform scheme, TMDA channel is employed for 1x EV-DO high-speed data user and CDMA channel for CDMA2000 1x voice or low-speed data user. The TDMA user and CDMA user are identified by independent PN sequence channel address codes, which makes the interference eliminator well implement. At same time, we also propose the implement block diagram with brief introduction.