Grid-search-based hybrid TOA/AOA location techniques for NLOS environments

For geometrically based single bounce circular model (GBSBCM), a new grid-search based technique is proposed to solve the constraint, nonlinear, underdetermined equations for wireless location in non-lineof- sight (NLOS) environments. Under the assumption of relatively small measurement errors of angle of arrival (AOA) and time of arrival (TOA), more accurate location results than those of existing methods can be achieved by searching in the feasible area.