Title :
Low-Complexity Sphere Decoding Detector for Generalized Spatial Modulation Systems
Author :
Cal-Braz, Joao A. ; Sampaio-Neto, Raimundo
Author_Institution :
Nat. Inst. of Metrol., Quality & Technol. (Inmetro), Duque de Caxias, Brazil
Abstract :
This letter presents a sphere decoding strategy for generalized spatial modulation (GSM) systems. The proposed modifications reduce the exhaustive tree search for lattice points and exploits the structure of GSM, restraining the tree branches to those that result in valid antenna combinations. As a result, every found lattice point results in valid GSM transmitted symbols. The numerical results exhibit significant complexity reduction.
Keywords :
MIMO communication; modulation coding; tree searching; GSM systems; GSM transmitted symbols; exhaustive tree search; generalized spatial modulation systems; lattice points; low-complexity sphere decoding detector; valid antenna combinations; Detectors; GSM; Lattices; Modulation; Transmitting antennas; Vectors; MIMO systems; spatial modulation; sphere decoding;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2320936
