Signal Waveform Construction for Position Determination by Scrambled Conical

A location processor to determine the location of a mobile station based on a signal received from a remote station within an antenna beam, wherein a position of the beam traverses a scan pattern in a non-sequential order, the location processor comprising:

• a measurement unit configured to make a signal strength measurement of said received signal at a plurality of the beam positions;
• a noise unit connected to an output of the measurement unit and configured to spread a noise component of the signal strength measurements;
• and
• a location unit configured to determine the location of the mobile station based on the signal strength measurements output by the noise unit.

A method for transmitting a signal comprising:

• generating a signal;
• determining a scan pattern for an antenna beam, said scan pattern having a plurality of sequentially spaced beam positions;
• and
• transmitting the signal to a mobile station within the antenna beam as the beam position traverses the scan pattern in a non-sequential order.

A transmitter for transmitting a signal comprising:

• a processor to generate a signal and to determine a scan pattern for an antenna beam, said scan pattern comprising a plurality of sequentially spaced beam positions;
• a beamformer to generate the antenna beam at a plurality of the beam positions;
• and
• an antenna array configured to transmit the signal within the antenna beam as the beam position traverses the scan pattern in a non-sequential order.

A method for determining a location of a mobile station comprising:

• generating a signal;
• determining a scan pattern for an antenna beam, said scan pattern having a plurality of sequentially spaced beam positions;
• transmitting the signal to a mobile station within the antenna beam as the beam position traverses the scan pattern in a non-sequential order;
• receiving the signal at the mobile station;
• making a signal strength measurement of the received signal at a plurality of the beam positions of the scan pattern;
• reordering the signal strength measurements to spread a noise component in the received signal;
• and
• determining a location of the mobile station based on the reordered signal strength measurements.

A wireless network comprising:

• a network device comprising:
• a processor to generate a signal and to determine a scan pattern for an antenna beam, said scan pattern comprising a plurality of sequentially spaced beam positions;
• a beamformer to generate the antenna beam at a plurality of the beam positions;
• and
• an antenna array configured to transmit the signal within the antenna beam as the beam position traverses the scan pattern in a non-sequential order;
• and
• a mobile station comprising:
• a receiver to receive the signal;
• a measurement unit to make a signal strength measurement of the received signal at a plurality of the beam positions of the scan pattern;
• a noise unit to reorder the signal strength measurements to spread a noise component in the received signal;
• and
• a location unit to determine a location of the mobile station based on the reordered signal strength measurements.

A method for determining a location of a mobile station, the method comprising:

• determining a first scan pattern comprising a plurality of sequentially ordered beam positions arranged about a first nominal center;
• determining a second scan pattern comprising a plurality of sequentially ordered beam positions arranged about a second nominal center;
• receiving a first signal associated with a first frequency from a remote station within a first beam, wherein a position of the first beam traverses the first scan pattern;
• receiving a second signal associated with a second frequency from a remote station within a second beam, wherein a position of the second beam traverses the second scan pattern;
• making a first signal strength measurement of said first signal and a second signal strength measurement of said second signal at a plurality of the beam positions of the first and second scan patterns;
• jointly processing the signal strength measurements made on two or more of the beam positions on said first and second frequencies to determine a combined correlation with said scan patterns;
• and
• determining the location of the mobile station based on the combined correlation.

A location processor to determine the location of a mobile station based on first and second signals received from a remote station within respective first and second beams, wherein a position of the first beam traverses a first scan pattern, and wherein a position of the second beam traverses a second scan pattern, the location processor comprising:

• a measurement unit configured to make a first signal strength measurement of said first signal and a second signal strength measurement of said second signal at a plurality of the beam positions of said first and second scan patterns;
• a noise unit configured to jointly process said first and second signal strength measurements made on two or more of the beam positions to determine a combined correlation with said scan patterns;
• and
• a location unit configured to determine the location of the mobile station based on the combined correlation output by the noise unit.

A method for transmitting a signal comprising:

• generating a first signal associated with a first frequency;
• generating a second signal associated with a second frequency;
• determining first and second scan patterns comprising a plurality of sequentially spaced beam positions;
• transmitting the first signal to a mobile station within a first beam as the position of the first beam traverses the first scan pattern;
• and
• transmitting the second signal to a mobile station within a second beam as the position of the second beam traverses the second scan pattern.

A transmitter for transmitting a signal comprising:

• a processor configured to:
• generate a first signal associated with a first frequency;
• generate a second signal associated with a second frequency;
• and
• determine first and second scan patterns comprising a plurality of sequentially spaced beam positions;
• a beamformer to generate first and second beams at two or more of the beam positions in the first and second scan patterns, respectively;
• and
• an antenna array configured to:
• transmit the first signal within the first beam as the position of the first beam traverses the first scan pattern;
• and
• transmit the second signal within the second beam as the position of the second beam traverses the second scan pattern.

A method for determining a location of a mobile station comprising:

• generating a first signal associated with a first frequency;
• generating a second signal associated with a second frequency;
• determining first and second scan patterns comprising a plurality of sequentially spaced beam positions;
• transmitting the first signal to the mobile station within a first beam as the position of the first beam traverses the first scan pattern;
• transmitting the second signal to the mobile station within a second beam as the position of the second beam traverses the second scan pattern;
• receiving the first and second signals at the mobile station;
• making a first signal strength measurement of said first signal and a second signal strength measurement of said second signal at two or more of the beam positions of the first and second scan patterns;
• jointly processing said first and second signal strength measurements made on two or more of said beam positions to determine a combined correlation of the signal strength measurements with said scan patterns;
• and
• determining a location of the mobile station based on the combined correlation.

A wireless network comprising:

• a network device comprising:
• a processor to generate first and second signals associated with respective first and second frequencies, and to determine first and second scan patterns comprising a plurality of sequentially spaced beam positions;
• a beamformer to generate first and second beams at two or more of the beam positions in the first and second scan patterns;
• and
• an antenna array to transmit the first signal within the first beam as the position of the first beam traverses the first scan pattern, and to transmit the second signal within the second beam as the position of the second beam traverses the second scan pattern;
• and
• a mobile station comprising:
• a receiver to receive the first and second signals;
• a measurement unit to make a first signal strength measurement of the first signal and a second signal strength measurement of said second signal at two or more of the beam positions of the first and second scan patterns, respectively;
• a noise unit configured to jointly process said first and second signal strength measurements made on two or more of the beam positions to determine a combined correlation with said scan patterns;
• and
• a location unit to determine a location of the mobile station based on the combined correlation.