Wake up radio frame with spectrum spreading based single carrier
First Claim
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1. A method of processing a single-carrier signal containing a representation of data bits, the method comprising:
- receiving, at a receiver circuit, a single-carrier signal including a spread spectrum signal portion carrying spread data sequences that correspond to data bits of a data frame;
separating, at the receiver circuit, each spread data sequence into an in-phase sequence and a quadrature-phase sequence;
determining, at the receiver circuit, for each in-phase sequence, an in-phase component;
determining, at the receiver circuit, for each quadrature-phase sequence, a quadrature-phase component, wherein determining the in-phase component and determining the quadrature-phase component are performed by separate operators; and
assigning, at the receiver circuit, a data bit value for each spread data sequence, based on a comparison of a combined magnitude of the respective in-phase and quadrature-phase components against a threshold.
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Abstract
Methods and systems for waking up a wireless receiving device having a wake-up radio (WUR) circuit. A low-power wake-up signal is transmitted, comprising a wake-up frame (WUF) including having a portion that is subjected to spectrum spreading and transmitted using a single carrier. The wake-up signal is processed by the receiving using non-coherent detection.
8 Citations
22 Claims
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1. A method of processing a single-carrier signal containing a representation of data bits, the method comprising:
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receiving, at a receiver circuit, a single-carrier signal including a spread spectrum signal portion carrying spread data sequences that correspond to data bits of a data frame; separating, at the receiver circuit, each spread data sequence into an in-phase sequence and a quadrature-phase sequence; determining, at the receiver circuit, for each in-phase sequence, an in-phase component; determining, at the receiver circuit, for each quadrature-phase sequence, a quadrature-phase component, wherein determining the in-phase component and determining the quadrature-phase component are performed by separate operators; and assigning, at the receiver circuit, a data bit value for each spread data sequence, based on a comparison of a combined magnitude of the respective in-phase and quadrature-phase components against a threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A receiver circuit configured to:
receive a single-carrier signal including a spread spectrum signal portion carrying spread data sequences that correspond to data bits of a data frame; separate each spread data sequence into an in-phase sequence and a quadrature-phase sequence; determine, using a first operator, for each in-phase sequence, an in-phase component; determine, using a second operator, for each quadrature-phase sequence, a quadrature-phase component; and assign a data bit value for each spread data sequence, based on a comparison of a combined magnitude of the respective in-phase and quadrature-phase components against a threshold. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of providing a wake-up signal, comprising:
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applying a spreading sequence to successive data bits in a wake-up frame to generate corresponding spread data sequences, wherein the spreading sequence is a non-symmetrical sequence in which the non-symmetrical sequence exhibits non-symmetry between a first half and a second half of the non-symmetrical sequence; modulating the spread data sequences onto a single carrier to generate a single-carrier wake-up signal that includes a spread spectrum signal portion containing the spread data sequences; and transmitting the single-carrier wake-up signal over a wireless channel; wherein the non-symmetry exhibited by the non-symmetrical sequence includes at least; the first half and the second half of the non-symmetrical sequence are not exact reverse of each other; the first half and the second half of the non-symmetrical sequence are not identical to each other; and the first half and the second half of the non-symmetrical sequence are not complementary to each other. - View Dependent Claims (16, 17, 18)
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19. An access point for a wireless local area network, the access point comprising a transceiver circuit to provide a wake-up signal, the transceiver circuit configured to:
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apply a spreading sequence to successive data bits in a wake-up packet to generate corresponding spread data sequences, wherein the spreading sequence is a non-symmetrical sequence in which the non-symmetrical sequence exhibits non-symmetry between a first half and a second half of the non-symmetrical sequence; modulate the spread data sequences onto a single carrier to generate a single-carrier wake-up signal that includes a spread spectrum signal portion containing the spread data sequences; and transmit the single-carrier wake-up signal over a wireless channel; wherein the non-symmetry exhibited by the non-symmetrical sequence includes at least; the first half and the second half of the non-symmetrical sequence are not exact reverse of each other; the first half and the second half of the non-symmetrical sequence are not identical to each other; and the first half and the second half of the non-symmetrical sequence are not complementary to each other. - View Dependent Claims (20, 21, 22)
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Specification