Base station software for multi-user detection uplinks and downlinks and method thereof

1. A method of multi-user detection in a given uplink and downlink time slot in a software-defined wireless receiver, the method comprising:

receiving a received signal by at least one antenna in the wireless receiver;

filtering and sampling the received signal to create sampled signals;

forming a block-banded matrix A of the sampled signals;

via a multi-threaded processor, solving {circumflex over (d)}=T −1 y, where T=(A H A), y=A H x by selecting between and applying at least one computational approach comprising

(1) applying the inverse matrix T of the system matrix T −1 using a zero-forcing equalizer or decorrelating detector and computing Cholesky factors of the matrix T by approximating using the block-banded property of the matrix T and A, wherein at least the solving and the computing are performed via the multi-threaded processor;

(2) applying Schur decomposition for Cholesky factors of the matrix T, computing a generator matrix G of the matrix T, Givens rotating the matrix G to produce lower triangular Cholesky factor matrix R, and approximating matrix R using block Toeplitz property of matrix T, wherein at least the solving and the computing are performed via the multi-threaded processor;

(3) applying Fourier Transformation and padding the matrix T to make it circulant before solving, wherein at least the solving and the padding are performed via the multi-threaded processor;

wherein the multi-threaded processor is connected to the at least one antenna in the wireless receiver and comprises

a single instruction multiple data (SIMD) Vector/digital signal processor (DSP) unit,

a parallel reduction unit, and

a reduced instruction set computer (RISC)-based integer unit.

2. The method of claim 1 , wherein, when applying the Schur decomposition approach, only first couple of block columns of the matrix R are computed and the last block is copied.