Random phase multiple access communication interface system and method
First Claim
1. A method for communicating through a multiple access communication interface, the method comprising:
- receiving a first signal from a first tag during a time slot, wherein the first signal is spread using a predetermined pseudo-noise (PN) code, wherein the first signal has a first random timing offset in that the first signal is transmitted at a first random time in an uplink portion of a half duplex system, and further wherein the first signal includes first payload data;
receiving a second signal from a second tag during the time slot, wherein the second signal is spread using the predetermined PN code, wherein the second signal has a second random timing offset in that the second signal is transmitted at a second random time in the uplink portion of the half duplex system, and further wherein the second signal includes second payload data, and further wherein at least a portion of the second signal is received while at least a portion of the first signal is received;
identifying the first payload data from the first signal; and
identifying the second payload data from the second signal.
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Accused Products
Abstract
A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise (PN) code, and further where the first signal includes first payload data. A second signal is received from a second tag. The second signal is spread using the predetermined PN code, and the second signal includes second payload data. The first payload data from the first signal is identified at least in part with a PN array despreader. The second payload data from the second signal is also identified at least in part with the PN array despreader.
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Citations
19 Claims
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1. A method for communicating through a multiple access communication interface, the method comprising:
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receiving a first signal from a first tag during a time slot, wherein the first signal is spread using a predetermined pseudo-noise (PN) code, wherein the first signal has a first random timing offset in that the first signal is transmitted at a first random time in an uplink portion of a half duplex system, and further wherein the first signal includes first payload data; receiving a second signal from a second tag during the time slot, wherein the second signal is spread using the predetermined PN code, wherein the second signal has a second random timing offset in that the second signal is transmitted at a second random time in the uplink portion of the half duplex system, and further wherein the second signal includes second payload data, and further wherein at least a portion of the second signal is received while at least a portion of the first signal is received; identifying the first payload data from the first signal; and identifying the second payload data from the second signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for communicating through a multiple access communication interface, the system comprising:
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a first tag having a first transmitter configured to transmit first payload data in a first signal during a time slot, wherein the first signal is spread using a predetermined pseudo-noise (PN) code, and further wherein the first signal has a first random timing offset in that the first signal is transmitted at a first random time in an uplink portion of a half duplex system; a second tag having a second transmitter configured to transmit second payload data in a second signal during the time slot, wherein the second signal is spread using the predetermined PN code, and further wherein the second signal has a second random timing offset in that the second signal is transmitted at a second random time in the uplink portion of the half duplex system, and further wherein at least a portion of the second signal is received while at least a portion of the first signal is received; and an access point in communication with the first tag and with the second tag, wherein the access point comprises a receiver configured to receive the first signal and the second signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An access point for use in a multiple access communication system, the access point comprising;
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a processor; a receiver in communication with the processor and configured to receive a first signal from a first tag during a time slot, wherein the first signal includes first payload data, wherein the first signal has a first random timing offset in that the first signal is transmitted at a first random time in an uplink portion of a half duplex system, and further wherein the first signal is spread using a predetermined pseudo-noise (PN) code; and receive a second signal from a second tag during the time slot, wherein the second signal includes second payload data, wherein the second signal has a second random timing offset in that the second signal is transmitted at a second random time in the uplink portion of the half duplex system, and further wherein the second signal is spread using the predetermined PN code, and further wherein at least a portion of the second signal is received while at least a portion of the first signal is received; and a transmitter in communication with the processor and configured to transmit a third signal to the first tag, wherein the third signal is spread with a second PN code, and further wherein the second PN code is specific to the first tag. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification