Coded antenna array

A method comprising:

• receiving, at each of a plurality of antennas, signals transmitted from a plurality of client devices;
• for each antenna, superimposing the signals received from the plurality of client devices by that antenna to form a respective incident signal;
• coding each of the respective incident signals with a respective code to form respective coded signals;
• combining the respective coded signals into a combined waveform;
• performing IQ demodulation of the combined waveform to generate a complex representation of the combined waveform including an in-phase component I(t) and a quadrature component Q(t);
• applying the codes used to code the respective incident signals to the complex representation of the combined waveform to extract the respective incident signal for each of the plurality of antennas;
• and
• filtering the incident signals that are extracted to separate out the signals received from individual client devices at each of the plurality of antennas.

An apparatus, comprising:

• a plurality of antennas, each antenna configured to receive signals transmitted from a plurality of client devices and superimpose the received signals to form an incident signal;
• means for coding each of the respective incident signals with a respective code to form respective coded signals;
• means for combining the respective coded signals into a combined waveform;
• means for performing IQ demodulation of the combined waveform to generate a complex representation of the combined waveform including an in-phase component I(t) and a quadrature component Q(t);
• means for applying the codes used for coding the respective incident signals to the complex representation of the combined waveform to extract the respective incident signal for each of the plurality of antennas;
• and
• means for filtering the incident signals that are extracted to separate out the signals received from individual client devices at each of the plurality of antennas.