Frame structure for filter bank multi-carrier (FBMC) waveforms
First Claim
1. A method for communicating, the method comprising:
- communicating, by a wireless device, a filter bank multi-carrier (FBMC) frame over an air interface of a wireless network, wherein a frame duration of the FBMC frame is an integer multiple of a duration of an orthogonal frequency division multiple access (OFDMA) frame element in an OFDMA frame communicated in the wireless network or in a neighboring wireless network, wherein the OFDMA frame element includes the OFDMA frame, a transmission time interval (TTI) of the OFDMA frame, or a slot in the TTI of the OFDMA frame, and wherein the FBMC frame includes a portion of a time window produced from circularly convolved filtering modulation of an FBMC block carried by an adjoining FBMC frame, the adjoining FBMC frame being communicated consecutively with the FBMC frame in the time domain.
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Accused Products
Abstract
A unified frame structure for filter bank multi-carrier (FBMC) and orthogonal frequency division multiplexed (OFDM) waveforms may allow FBMC and OFDM frames to be communicated over a common channel without significant inter-frame gaps. The unified frame structure may set an FBMC frame duration to an integer multiple of an OFDM frame element duration to enable alignment of FBMC frames and OFDM frames in the time domain. The unified frame structure may also map control channels in the FBMC and OFDM frames to common resource locations so that the respective control channels are aligned in the time and/or frequency domains. The unified frame structure may also share synchronization channels between FBMC and OFDM frames. Additionally, overhead in an FBMC time division duplexed (TDD) communications channel can be reduced by overlapping time windows appended to FBMC blocks.
21 Citations
20 Claims
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1. A method for communicating, the method comprising:
communicating, by a wireless device, a filter bank multi-carrier (FBMC) frame over an air interface of a wireless network, wherein a frame duration of the FBMC frame is an integer multiple of a duration of an orthogonal frequency division multiple access (OFDMA) frame element in an OFDMA frame communicated in the wireless network or in a neighboring wireless network, wherein the OFDMA frame element includes the OFDMA frame, a transmission time interval (TTI) of the OFDMA frame, or a slot in the TTI of the OFDMA frame, and wherein the FBMC frame includes a portion of a time window produced from circularly convolved filtering modulation of an FBMC block carried by an adjoining FBMC frame, the adjoining FBMC frame being communicated consecutively with the FBMC frame in the time domain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless device comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; communicate a filter bank multi-carrier (FBMC) frame over an air interface of a wireless network, wherein a frame duration of the FBMC frame is an integer multiple of a duration of an orthogonal frequency division multiple access (OFDMA) frame element in an OFDMA frame communicated in the wireless network or in a neighboring wireless network, and wherein the OFDMA frame element includes the OFDMA frame, a transmission time interval (TTI) of the OFDMA frame, or a slot in the TTI of the OFDMA frame, and wherein the FBMC frame includes a portion of a time window produced from circularly convolved filtering modulation of an FBMC block carried by an adjoining FBMC frame, the adjoining FBMC frame being communicated consequently with the FBMC frame in the time domain.
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10. A method for reducing overhead in a time division duplexed (TDD) communications session of a wireless network, the method comprising:
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detecting, by a wireless transceiver, a first filter bank multi-carrier (FBMC) block over a frequency resource during a first period, the first FBMC block being communicated in a wireless transmission that includes the first FBMC block and a first time window produced from circularly convolved filtering modulation of the first FBMC block; and transmitting, by the wireless transceiver, an output signal over the frequency resource during a second period, wherein the output signal includes a second FBMC block and a second time window produced from circularly convolved filtering modulation of the second FBMC block, and wherein the second time window produced from circularly convolved filtering modulation of the second FBMC block partially overlaps the first time window produced from circularly convolved filtering modulation of the first FBMC block such that at least a portion of the second time window and a portion of the first time window are communicated over common time-frequency resources. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless device comprising:
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a processor; and a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to; detect a first filter bank multi-carrier (FBMC) block over a frequency resource during a first period, the first FBMC block being communicated in a wireless transmission that includes the first FBMC block and a first time window produced from circularly convolved filtering modulation of the first FBMC block; and transmit an output signal over the frequency resource during a second period, wherein the output signal includes a second FBMC block and a second time window produced from circularly convolved filtering modulation of the second FBMC block, and wherein the second time window produced from circularly convolved filtering modulation of the second FBMC block partially overlaps the first time window produced from circularly convolved filtering modulation of the first FBMC block such that at least a portion of the second time window and a portion of the first time window are communicated over common time-frequency resources.
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Specification