CDMA Transmit Acceleration for DSPS in Basestations

This paper describes how the RSA (rake search accelerator) on Texas Instruments TCI6482 and TCI6488 DSP´s can be used instead for accelerating the transmit functions of CDMA (code division multiple access) based standards like the 3^rd generation mobile phone standard 3GPP. The architecture of the accelerator is overviewed together with how it is connected to the DSP and how it is used in conjunction with standard DSP software to implement the chip-rate transmit functionality of a 3^rd generation base-station. Discussion includes real time processing, latency requirements and software structuring for handling both single and multi-sector base-station on a single chip DSP from symbol rate data all the way to baseband CDMA data.