HSDPA high speed downlink packet access is
4 04 2009This system is evolved from and backward compatible with Release WCDMA systems, which is basically voice service. In order to further increase the system capacity and enhance the quality of services, MIMO technology will be adopted in the next phase of the 3GPP standards, in which Mbps of data transmission will be achieved.
In this project, we developed the key technologies on fast link adaptation for HSDPA, with the focus on MIMO and transmit diversity, to prepare the essential technologies for 4th generation wireless communication. Technical Discussion HSDPA is packetbased data service in the 3rd generation WCDMA wideband CDMA systems, which provides highspeed data transmission up to 810 Mbps in CDMA downlink to support multimedia services.
In order to reach higher peak rate 20 Mbps, MIMO technology is used, in which multiple antennas are implemented at both basestation and mobile UE terminals. Due to the high data rate transmission, the trade off between complexity and system performance becomes an important issue, especially for the UE designs. At the transmitter, the information bits are divided into several bit streams and transmitted through different antennas. This system is evolved from and backward compatible with Release WCDMA systems, which is basically voice service.
At the transmitter, the information bits are divided into several bit streams and transmitted through different antennas. HSDPA high speed downlink packet access is data service in WCDMA downlink with data transmission up to approximately Mbps over 5MHz bandwidth. The research in MERL focused on the MIMO transceiver design, system performance evaluation, advanced receiver design and extension of transmit diversity schemes with more than transmit antennas.. This system is evolved from and backward compatible with Release WCDMA systems, which is basically voice service.
