Near-A_n-Lattice Sphere Decoding Technique Assisted Optimum Detection for Block Data Transmission Systems

Abstract

This letter proposes the use of a new near-A_n-lattice sphere decoding (LSD) technique for optimum detection in block-data transmission systems instead of the traditional LSD technique. The proposed channel matrix mimics the generator matrix of an A_n lattice. The condition number (λ) of the proposed channel matrix is less than those of traditional LSD matrices and the initial radius (d) is deterministic, thus the proposed technique achieves significant improvement in performance and complexity reduction.