Wireless telephone distribution system with time and space diversity transmission for determining receiver location

In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station using a CDMA PN sequence, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet using said PN sequence to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet using said PN sequence on a second antenna to form a second transmitted data packet after said first transmitted data packet, a method in a receiver in said subscriber station for receiving said data packet, said method comprising:

• receiving said first transmitted data packet at said subscriber station receiver forming said first received data packet;
• receiving said second transmitted data packet at said subscriber station receiver forming respective second received data packet after receiving said first transmitted data packet;
• wherein said system further includes retransmitting said data packet using said PN sequence on a third antenna to form a third transmitted data packet after said second transmitted data packet, said method for receiving said data packet in said subscriber station receiver further comprising:
• receiving said third transmitted data packet at said subscriber station receiver forming said third received data packet after receiving said second transmitted data packet;
• selecting at least one of said first, second and third received data packets to form said received data packet at said receiver;
• measuring the respective time of arrival using said PN sequence phase relative to said first, second and third transmitted data packets at said subscriber station, and
• computing and subsequently storing in said subscriber station the location of said subscriber station from said respective measured time of arrival of said first, second and third transmitted data packets.

In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station using a CDMA PN sequence, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet using said PN sequence to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet using said PN sequence on a second antenna to form a second transmitted data packet after said first transmitted data packet, a method in a receiver in said subscriber station for receiving said data packet, said method comprising:

• receiving said first transmitted data packet at said subscriber station receiver forming said first received data packet;
• receiving said second transmitted data packet at said subscriber station receiver forming respective second received data packet after receiving said first transmitted data packet;
• wherein said system further includes retransmitting said data packet using said PN sequence on a third antenna to form a third transmitted data packet after said second transmitted data packet, said method for receiving said data packet in said subscriber station receiver further comprising:
• receiving said third transmitted data packet at said subscriber station receiver forming said third received data packet after receiving said second transmitted data packet;
• selecting at least one of said first, second and third received data packets to form said received data packet at said receiver;
• measuring the respective time of arrival using said PN sequence phase relative to said first, second and third transmitted data packets at said subscriber station;
• computing a location file comprising data representing the location of said subscriber station from said respective measured time of arrival of said first, second and third transmitted data packets;
• and
• transmitting the contents of said location file containing data corresponding to said measured respective time of arrival of said first, second and third transmitted data packets at said subscriber station from said subscriber station to said base station.

In a wireless communication system, wherein a data packet is communicated from a transmitter to a receiver to form a received data packet, an apparatus for determining the location of said receiver, said system including first, second and third antennas spaced apart from each other, said apparatus comprising:

• means for transmitting said data packet from said first antenna to form a first transmitted data packet;
• means for transmitting said data packet from said second antenna to form a second transmitted data packet after said first transmitted data packet;
• means for transmitting said data packet from said third antenna to form a third transmitted data packet after said second transmitted data packet;
• means for receiving in sequence said first, second and third transmitted data packets at said receiver forming respective first, second and third received data packets;
• means for selecting at least one of said first and second received data packets to form said digital data at said receiver;
• means for measuring the respective time of arrival of said first, second and third transmitted data packets at said receiver;
• and
• means for computing the location of said receiver from said respective measured time of arrival of said first, second and third transmitted data packets.

In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station using a CDMA PN sequence, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet using said PN sequence to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet using said PN sequence on a second antenna to form a second transmitted data packet after said first transmitted data packet, an apparatus in a receiver in said subscriber station for receiving said data packet, said apparatus comprising:

• means for receiving said first transmitted data packet at said subscriber station receiver forming said first received data packet;
• means for receiving said second transmitted data packet at said subscriber station receiver forming respective second received data packet after receiving said first transmitted data packet,
• wherein said system further includes retransmitting said data packet using said PN sequence on a third antenna to form a third transmitted data packet after said second transmitted data packet, said apparatus for receiving said data packet in said subscriber station receiver further comprising:
• means for receiving said third transmitted data packet at said subscriber station receiver forming said third received data packet after receiving said second transmitted data packet;
• means for selecting at least one of said first, second and third received data packets to form said received data packet at said receiver;
• means for measuring the respective time of arrival using said PN sequence phase relative to said first, second and third transmitted data packets at said subscriber station, and
• means for computing and subsequently storing in said subscriber station the location of said subscriber station from said respective measured time of arrival of said first, second and third transmitted data packets.

In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station using a cdma PN sequence, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet using said PN sequence to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet using said PN sequence on a second antenna to form a second transmitted data packet after said first transmitted data packet, an apparatus in a receiver in said subscriber station for receiving said data packet, said apparatus comprising:

• means for receiving said first transmitted data packet at said subscriber station receiver forming said first received data packet;
• means for receiving said second transmitted data packet at said subscriber station receiver forming respective second received data packet after receiving said first transmitted data packet;
• wherein said system further includes means for retransmitting said data packet using said PN sequence on a third antenna to form a third transmitted data packet after said second transmitted data packet, said apparatus for receiving said data packet in said subscriber station receiver further comprising:
• means for receiving said third transmitted data packet at said subscriber station receiver forming said third received data packet after receiving said second transmitted data packet;
• means for selecting at least one of said first, second and third received data packets to form said received data packet at said receiver;
• means for measuring the respective time of arrival using said PN sequence phase relative to said first, second and third transmitted data packets at said subscriber station;
• means for computing a location file comprising data representing the location of said subscriber station from said respective measured time of arrival of said first, second and third transmitted data packets;
• and
• means for transmitting the contents of said location file containing data corresponding to said measured respective time of arrival of said first, second and third transmitted data packets at said subscriber station from said subscriber station to said base station.

In a wireless communication system, wherein a data packet is communicated from a transmitter to a receiver to form a received data packet, including a method for determining the location of said receiver, said system including first, second and third antennas spaced apart from each other, a method for calibrating said location system, said calibration method comprising:

• positioning a calibration receiver at a known location;
• transmitting said data packet from said first antenna to form a first transmitted data packet;
• transmitting said data packet from said second antenna to form a second transmitted data packet after said first transmitted data packet;
• transmitting said data packet from said third antenna to form a third transmitted data packet after said second transmitted data packet;
• receiving in sequence said first, second and third transmitted data packets at said calibration receiver forming respective first, second and third received data packets;
• measuring the respective time of arrival of said first, second and third transmitted data packets at said calibration receiver;
• computing the location of said calibration receiver from said respective measured time of arrival of said first, second and third transmitted data packets;
• and
• comparing the computed location of said calibration receiver to said known location.

In a wireless communication system, wherein a data packet is communicated from a transmitter to a receiver to form a received data packet, including an apparatus for determining the location of said receiver, said system including first, second and third antennas spaced apart from each other, an apparatus for calibrating said location system, said calibration apparatus comprising:

• a calibration receiver positioned at a known location;
• means for transmitting said data packet from said first antenna to form a first transmitted data packet;
• means for transmitting said data packet from said second antenna to form a second transmitted data packet after said first transmitted data packet;
• means for transmitting said data packet from said third antenna to form a third transmitted data packet after said second transmitted data packet;
• means for receiving in sequence said first, second and third transmitted data packets at said calibration receiver forming respective first, second and third received data packets;
• means for measuring the respective time of arrival of said first, second and third transmitted data packets at said calibration receiver;
• means for computing the location of said calibration receiver from said respective measured time of arrival of said first, second and third transmitted data packets;
• and
• means for comparing the computed location of said calibration receiver to said known location.

In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station using a CDMA PN sequence, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet using said PN sequence to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet using said PN sequence on a second antenna to form a second transmitted data packet after said first transmitted data packet, a method in a receiver in said subscriber station for receiving said data packet, said method comprising:

• receiving said first transmitted data packet at said subscriber station receiver forming said first received data packet;
• receiving said second transmitted data packet at said subscriber station receiver forming respective second received data packet after receiving said first transmitted data packet;
• wherein said system further includes retransmitting said data packet using said PN sequence on a third antenna to form a third transmitted data packet after said second transmitted data packet, said method for receiving said data packet in said subscriber station receiver further comprising:
• receiving said third transmitted data packet at said subscriber station receiver forming said third received data packet after receiving said second transmitted data packet;
• selecting at least one of said first, second and third received data packets to form said received data packet at said receiver;
• measuring the respective time of arrival using said PN sequence phase relative to said first, second and third transmitted data packets at said subscriber station;
• computing a location file comprising data corresponding to said respective measured time of arrival of said first, second and third transmitted data packets;
• and
• transmitting the contents of said location file containing data corresponding to said measured respective time of arrival of said first, second and third transmitted data packets at said subscriber station from said subscriber station to a location service center separate from said base station.

In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station using a cdma PN sequence, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet using said PN sequence to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet using said PN sequence on a second antenna to form a second transmitted data packet after said first transmitted data packet, an apparatus in a receiver in said subscriber station for receiving said data packet, said apparatus comprising:

• means for receiving said first transmitted data packet at said subscriber station receiver forming said first received data packet;
• means for receiving said second transmitted data packet at said subscriber station receiver forming respective second received data packet after receiving said first transmitted data packet;
• wherein said system further includes retransmitting said data packet using said PN sequence on a third antenna to form a third transmitted data packet after said second transmitted data packet, said apparatus for receiving said data packet in said subscriber station receiver further comprising:
• means for receiving said third transmitted data packet at said subscriber station receiver forming said third received data packet after receiving said second transmitted data packet;
• means for selecting at least one of said first, second and third received data packets to form said received data packet at said receiver;
• means for measuring the respective time of arrival using said PN sequence phase relative to said first, second and third transmitted data packets at said subscriber station;
• means for computing a location file comprising data corresponding to said respective measured time of arrival of said first, second and third transmitted data packets;
• and
• means for transmitting the contents of said location file containing data corresponding to said measured respective time of arrival of said first, second and third transmitted data packets at said subscriber station from said subscriber station to a location service center separate from said base station.

In a wireless CDMA communication system, wherein data packets are communicated from a plurality of transmitters to a receiver using at least one CDMA PN sequence to form a plurality of received data packets, said CDMA communication system including first, second and third antennas spaced apart from each other, a method for determining the actual geographic location of said receiver, said method comprising:

• receiving said first, second and third transmitted data packets at said receiver forming respective first, second and third received data packets;
• measuring the respective time of arrival using said PN sequence phase relative to at least one of said first, second and third transmitted data packets at said receiver;
• storing the geographic coordinates of said first, second and third antennas;
• and
• computing the actual geographic location of said receiver from said stored geographic coordinates of said first, second and third antennas and said respective measured time of arrival of said first, second and third transmitted data packets.

In a wireless CDMA communication system, wherein data packets are communicated from a plurality of transmitters to a receiver using at least one CDMA PN sequence to form a plurality of received data packets, said CDMA communication system including first, second and third antennas spaced apart from each other, an apparatus for determining the actual geographic location of said receiver, said apparatus comprising:

• means for receiving said first, second and third transmitted data packets at said receiver forming respective first, second and third received data packets;
• means for measuring the respective time of arrival using said PN sequence phase relative to at least one of said first, second and third transmitted data packets at said receiver;
• means for storing the geographic coordinates of said first, second and third antennas;
• and
• means for computing the actual geographic location of said receiver from said stored geographic coordinates of said first, second and third antennas and said respective measured time of arrival of said first, second and third transmitted data packets.