This invention relates to a method and system for the radio location of CDMA
and non-CDMA enabled transmitters within a reception zone. The invention exploits
the superposition of antenna patterns that create complex and asymmetrical interference
structures at very small scales. By randomly distributing a random antenna array
of M elements across a two or three-dimensional surface, fine scale interference
structures on the scale of the carrier wavelength are generated. Once the
minimum number of antennas are placed, additional antennas will not improve the
resolution. Such interference structures when sampled at the carrier wavelength
or greater yields unique spatial patterns with respect to a given antenna array
geometry and transmitter location. The invention incorporates signature recognition
(matching) and orthogonal sub-space projection estimators to derive location estimates
of a radio transmitter.