An Initial Acquisition Scheme for Software Defined CDMA2000 1xEV-DO Radio Terminal

CDMA2000 lxEV-DO is a code division multiplex cellular system and requires that the terminals search the PN code sequences of the base station (BS) during the initial acquisition stage. The exclusive hardware is frequently used for initial acquisition due to its heavy computational complexity. However, in software defined radio (SDR) terminals, initial acquisition has to be processed by software using the digital signal processor (DSP), which has reasonable performance, and must be finished within a practical time. This paper presents an initial acquisition scheme suitable for SDR-based CDMA2000 lxEV-DO terminals. The implementation onto our SDR platform and the field test results of the initial acquisition time are also described.