Aiming at the problem that accuracy of existing ranging technology is susceptible to environmental noise

on the basis of multidimensional scaling（ MDS） is developed analysis method

combine with the methodology of weighted least squares

and improve it

propose a cooperative

localization algorithm named WLS-MDS

based on received signal strength（ RSS）. The result of simulation demonstrates that the proposed algorithm can achieve an ideal positioning position in extreme situation such as environmental noise interference and a minority of anchors node. The proposed algorithm outperforms MDS as well as LLS

which makes it more suitable for large-scale wireless sensor networks（ WSNs）.