Data compression MMSE multiuser detection based on FAPI subspace tracking algorithm

For the subspace tracking algorithms that only track the subspace basis, a data compression MMSE multiuser detection (DCMMSE-MUD) is proposed by the data compression method. Its computational complexity is O(NK). FAPI subspace tracking algorithm can tracks the subspace bisis, and has the advantages of simple construction, better orthgonality and lower computational complexity (O(NK)). The results of DCMMSE-MUD´s simulations based on FAPI subspace tracking algorithm show that the performance of the detection method is perfect.