Outline of a Multiple-Access Communication Network Based on Adaptive Arrays

This paper proposes a single-frequency communication system consisting of
K
mobile users simultaneously communicating with a central station equipped with a computationally adapted array consisting of
n
≥
K
antennas. The array employs
K
sets of
n
weights to segregate the signals received from the
K
users. The weights are determined by direct computation based on position information determined by direct computation based on position information transmitted by the users. Currently known techniques require (for
n
=
K
) about (4/3)
K
⁴
computer `operations' (multiply and add). An improved technique is developed here which accomplishes this in 8/
K
³
operations, yielding a reduction by a factor of
K
/6.