Use of orthogonal or near orthogonal codes in reverse link
First Claim
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1. An apparatus for wireless communication, the apparatus comprising:
- a receiver configured to receive signals and recover data from a first plurality of subscriber units and a second plurality of subscriber units in a time interval and to receive an indication of a first chipping rate that is used by a first group of terminals;
wherein the received signal from each of the second plurality of subscriber units is derived at least from data, a different orthogonal sequence than others of the second plurality of subscriber units, and a same PN sequence as the others of the second plurality of subscriber units; and
a transmitter configured to transmit using a first pseudorandom noise (PN) code and a phase shift at the first chipping rate, and an orthogonal spreading code having a chipping rate less than the first chipping rate.
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Abstract
An apparatus for use with a shared access communication channel is disclosed. The chipping rate of a first group of terminals is determined. Transmissions on the shared access communication channel are encoded using first pseudorandom noise (PN) code and a phase shift at the first chipping rate and an orthogonal spreading code having a chipping rate less than the first chipping rate. The apparatus may receive a feedback channel assignment and may receive an indication of a change in timing on the assigned feedback channel.
22 Citations
19 Claims
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1. An apparatus for wireless communication, the apparatus comprising:
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a receiver configured to receive signals and recover data from a first plurality of subscriber units and a second plurality of subscriber units in a time interval and to receive an indication of a first chipping rate that is used by a first group of terminals;
wherein the received signal from each of the second plurality of subscriber units is derived at least from data, a different orthogonal sequence than others of the second plurality of subscriber units, and a same PN sequence as the others of the second plurality of subscriber units; anda transmitter configured to transmit using a first pseudorandom noise (PN) code and a phase shift at the first chipping rate, and an orthogonal spreading code having a chipping rate less than the first chipping rate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless network device comprising:
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circuitry configured to receive signals and recover data from a first plurality of subscriber units and a second plurality of subscriber units in a time interval; wherein the time interval includes at least one time slot; wherein the received signals from each of the first plurality of subscriber units is derived at least from data and a different pseudo noise (PN) sequence than others of the first plurality of subscriber units; wherein the received signal from each of the second plurality of subscriber units is derived at least from data, a different orthogonal sequence than others of the second plurality of subscriber units and a same PN sequence as the others of the second plurality of subscriber units. - View Dependent Claims (9, 10, 11)
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12. A method comprising:
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receiving signals and recovering data, by a wireless network device, from a first plurality of subscriber units and a second plurality of subscriber units in a time interval; wherein the time interval includes at least one time slot;
wherein the received signals from each of the first plurality of subscriber units is derived at least from data and a different pseudo noise (PN) sequence than others of the first plurality of subscriber units;wherein the received signal from each of the second plurality of subscriber units is derived at least from data, a different orthogonal sequence than others of the second plurality of subscriber units and a same PN sequence as the others of the second plurality of subscriber units. - View Dependent Claims (13, 14, 15)
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16. A subscriber unit comprising:
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circuitry configured to transmit a wireless signal to a base station in a first time interval including at least one time slot; wherein the circuitry is configured to derive the wireless signal at least from data and a different pseudo noise (PN) sequence than others of a first plurality of subscriber units and not from an orthogonal sequence; wherein the circuitry is further configured to transmit a second wireless signal in a second time interval including at least one time slot; wherein the circuitry is further configured to derive the second wireless signal at least from data, a different orthogonal sequence than others of a second plurality of subscriber units and a same PN sequence as the others of the second plurality of subscriber units. - View Dependent Claims (17, 18, 19)
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Specification