Cordic based algorithms for software defined radio (SDR) baseband processing

摘要

This paper presents two Cordic based algorithms which may be used for digitalbaseband processing in OFDM and/or CDMA based communication systems. The first one isa linear least squares based multiuser detector for CDMA incorporating descrambling anddespreading. The second algorithm is a pure Cordic based FFT implementation.Both algorithms can be implemented using solely Cordic based architectures (e.g. coprocessors or ASIPs).The algorithms exactly fit the needs of a multistandard terminal asthey both are freely parameterizable. This regards to the accuracy of the results as well as to theparameters of the performed function (e.g. size of the FFT).