Improved OPAST algorithm and its application in the blind multiuser detection
Ren Song-yu · Electronic Design Engineering · 2012
The orthonormal projection approximation and subspace tracking algorithm(OPAST) is introduced.It is a kind of method based on the theory of optimum.It guarantees the orthonormality of the weight matrix at each iteration.Moreover it has a linear complexity like the PAST algorithm and a global convergence property like the natural power(NP) method.However it can appear suddenly increase ber phenomenon after a certain numbern of iteration,when it is applied to the blind multiuser detection.It lead to decline in the performance.In order to solve this problem,this paper puts forward a method,and prove it is effective through the results of the simulation.