Wcdma for Umts
Capacity gain of beamforming techniques in a WCDMA system under channelization code constraints
IEEE Transactions on Wireless Communications
| Hi-index | 0.00 |
3rd Generation Partner Ship Project (3GPP) produced the first full version of the Wideband CDMA (WCDMA) standard at the end of 1999. Release'99, meets all the IMT-2000 requirements, including 2 Mbps data rate with variable bit rate capability, support of multi-service, quality of service differentiation and efficient packet data. The Release'5 specifications were created in March 2002 and they contain downlink packet data operation enhancement, under the title High Speed Downlink Packet Access (HSDPA). HSDPA utilizes Hybrid Automatic Repeat Request (HARQ), link adaptation and higher order modulation for improving data spectral efficiency and for pushing bit rates beyond 10 Mbps. The further 3GPP releases will study the enhancements of packet data performance in uplink. Other important features in future 3GPP releases include advanced antenna technologies and WCDMA standard for new spectrum allocations. The paper describes the main solutions of 3GPP WCDMA standard in more detail.