METHOD AND APPARATUS FOR S INGLE- CARRIER FDMA BASED PACKET WIRELESS TELECOMMUNICATIONS

摘要

In a wireless telecommunications network, a Code Division Multiple Access scheme is applied to data to encode it. The CDMA encoded data may be time multiplexed with other data symbols. The time multiplexed data are then applied to Single Carrier-Frequency Division Multiple Access, SC-FDMA, transmissions. The CDMA scheme may be used for relatively small payloads, such as those associated with voice traffic and control signals, and the other data symbols are used for higher date rate transmissions. This enables autonomous transmission, without scheduling, for smaller payloads. A transmitter includes a selector (3) for performing time multiplexing in the uplink, the required transmission scheme being indicated by the Hybrid Automatic Repeat Request,HARQ, ID. A first branch (1) carries the other data symbols and a second branch (2) carries data to be transmitted as a CDMA scheme. A CAZAC code may be used in encoding the CDMA data.