Algorithm Computing the Inverse of Joint Detection Matrix Based on Improved Block-FFT Algorithm

Joint Detection is one of crucial techniques of TD-SCDMA system.The design of the computation of the inverse of the matrix algorithm is a substantial factor affecting the complexity of Joint Detection.An algorithm computing the inverse of matrix for Joint Detection base on improved Block-FFT algorithm is investigated according to the character of the TD-SCDMA system and to the flexible application of the property of the block-circulant matrix.Simulation results indicate that the proposed algorithm exhibits same BER performance with the widely used standard Cholesky decomposition algorithm and approximate Cholesky decomposition algorithm,while its time complexity and space complexity are sharply decreased,thus enhancing implement possibility of the proposed algorithm.