Research of QRD-LSL interpolation algorithm based on square-root-free
一种无平方根运算的QRD-LSL插值算法研究*

To reduce the complexity of the QR-decomposition-based least-squares lattices(QRD-LSL) interpolation algorithm used in narrow-band interference(NBI) suppression, this paper proposed a square-root-free(SRF) QRD-LSL interpolation algorithm. The proposed interpolation algorithm, which was developed by applying SRF Givens rotation with feedback mechanism, could effectively avoid the square-root computations in QR-decomposition and improve QRD-LSL interpolation algorithm robustness in finite precision environment. The results of computer simulation confirm that the steady-state performance and the numerical robustness of the proposed algorithm outperforms the conventional QRD-LSL interpolation algorithm and holds good performance of NBI suppression in DSSS.