최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0042280 (2016-02-12) |
등록번호 | US-9391745 (2016-07-12) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 1 인용 특허 : 559 |
Methods and systems are described for orthogonal frequency division multiplexing (OFDM) transmission of data associated with multiple nodes and/or users. A plurality of weights may be determined based on, for example, feedback from one or more nodes. The feedback from each node may be indicative of
Methods and systems are described for orthogonal frequency division multiplexing (OFDM) transmission of data associated with multiple nodes and/or users. A plurality of weights may be determined based on, for example, feedback from one or more nodes. The feedback from each node may be indicative of weighting information. A multiple-input multiple-output (MIMO)-capable node may transmit OFDM transmissions, which may be time and frequency coincident, using the plurality of weights. For example, the MIMO-capable node may transmit a first OFDM transmission using at least a first weight of the plurality of weights and a second OFDM transmission using at least a second weight of the plurality of weights. This may allow the MIMO-capable node to, for example, transmit OFDM transmissions to multiple users via one or more common time-frequency channels.
1. A method comprising: receiving, from a first node, first feedback indicative of first weighting information;receiving, from a second node, second feedback indicative of second weighting information;determining, based at least in part on the first feedback and the second feedback, a plurality of w
1. A method comprising: receiving, from a first node, first feedback indicative of first weighting information;receiving, from a second node, second feedback indicative of second weighting information;determining, based at least in part on the first feedback and the second feedback, a plurality of weights; andtransmitting, via an antenna array of a multiple-input multiple-output (MIMO)-capable third node: a first orthogonal frequency division multiplexing (OFDM) transmission, using at least a first weight of the plurality of weights, that comprises first data associated with the first node; anda second OFDM transmission, using at least a second weight of the plurality of weights, that comprises second data associated with the second node,wherein the first OFDM transmission and the second OFDM transmission are time and frequency coincident. 2. The method of claim 1, wherein the first weighting information identifies a first weighting to be used for transmission by the MIMO-capable third node and the second weighting information identifies a second weighting to be used for transmission by the MIMO-capable third node. 3. The method of claim 1, wherein the first feedback is based at least in part on interference observed by the first node and the second feedback is based at least in part on interference observed by the second node. 4. The method of claim 1, wherein the transmitting comprises transmitting at least the first OFDM transmission and the second OFDM transmission using a multiple access scheme. 5. The method of claim 1, wherein the first OFDM transmission and the second OFDM transmission being time and frequency coincident comprises transmitting the first OFDM transmission via at least a first time-frequency channel and the second OFDM transmission via at least the first time-frequency channel. 6. The method of claim 1, wherein the first data comprises a first OFDM symbol and the second data comprises a second OFDM symbol. 7. The method of claim 1, wherein the transmitting comprises transmitting the first OFDM transmission via at least a first antenna of the antenna array and transmitting the second OFDM transmission via at least a second antenna of the antenna array. 8. The method of claim 1, wherein one or both of the first OFDM transmission or the second OFDM transmission comprises at least one of a rank 1 OFDM transmission or a rank 2 OFDM transmission. 9. A method comprising: receiving, from a first node, first feedback indicative of first weighting information;receiving, from a second node, second feedback indicative of second weighting information;determining, based at least in part on the first feedback and the second feedback, a plurality of weights;transmitting, via at least one antenna of an antenna array of a multiple-input multiple-output (MIMO)-capable third node, via at least a first time-frequency channel, and using at least a first weight of the plurality of weights, a first orthogonal frequency division multiplexing (OFDM) transmission that comprises first data associated with the first node; andtransmitting, via one or more antennas of the antenna array, via at least the first time-frequency channel, and using at least a second weight of the plurality of weights, a second OFDM transmission that comprises second data associated with the second node. 10. The method of claim 9, wherein the first weighting information identifies a first weighting to be used for transmission by the MIMO-capable third node and the second weighting information identifies a second weighting to be used for transmission by the MIMO-capable third node. 11. The method of claim 9, wherein the first feedback is based at least in part on interference observed by the first node and the second feedback is based at least in part on interference observed by the second node. 12. The method of claim 9, wherein the transmitting the first OFDM transmission and the transmitting the second OFDM transmission comprise transmitting at least the first OFDM transmission and the second OFDM transmission using a multiple access scheme. 13. The method of claim 9, wherein the first time-frequency channel comprises a plurality of tones. 14. The method of claim 9, wherein the first data comprises a first OFDM symbol and the second data comprises a second OFDM symbol. 15. The method of claim 9, wherein: the transmitting the first OFDM transmission via the at least one antenna comprises transmitting the first OFDM transmission via at least a first antenna of the antenna array; andthe transmitting the second OFDM transmission via the one or more antennas comprises transmitting the first OFDM transmission via at least a second antenna of the antenna array. 16. The method of claim 9, further comprising selecting the first time-frequency channel based at least in part on the first feedback and the second feedback. 17. A method comprising: receiving, from a first node, a first uplink transmission indicative of first weighting information;receiving, from a second node, a second uplink transmission indicative of second weighting information;determining, based at least in part on the first uplink transmission and the second uplink transmission, a plurality of weights;transmitting, via at least one antenna of a plurality of antennas of a multiple-input multiple-output (MIMO)-capable third node and using at least a first weight of the plurality of weights, a first orthogonal frequency division multiplexing (OFDM) downlink transmission that comprises first data associated with the first node; andtransmitting, via one or more antennas of the plurality of antennas and using at least a second weight of the plurality of weights, a second OFDM downlink transmission that comprises second data associated with the second node,wherein the first OFDM downlink transmission and the second OFDM downlink transmission are time and frequency coincident. 18. The method of claim 17, wherein the first weighting information identifies a first weighting to be used for downlink transmission by the MIMO-capable third node and the second weighting information identifies a second weighting to be used for downlink transmission by the MIMO-capable third node. 19. The method of claim 17, wherein the first uplink transmission is based at least in part on interference observed by the first node and the second uplink transmission is based at least in part on interference observed by the second node. 20. The method of claim 17, wherein the transmitting the first OFDM downlink transmission and the transmitting the second OFDM downlink transmission comprise transmitting at least the first OFDM downlink transmission and the second OFDM downlink transmission using a multiple access scheme. 21. The method of claim 17, wherein the first data comprises a first OFDM symbol and the second data comprises a second OFDM symbol. 22. The method of claim 17, wherein: the transmitting the first OFDM transmission via the at least one antenna comprises transmitting the first OFDM transmission via at least a first antenna of the plurality of antennas; andthe transmitting the second OFDM transmission via the one or more antennas comprises transmitting the first OFDM transmission via at least a second antenna of the plurality of antennas. 23. The method of claim 17, further comprising selecting, based at least in part on the first uplink transmission and the second uplink transmission, at least a first time-frequency channel, wherein the first OFDM downlink transmission and the second OFDM downlink transmission being time and frequency coincident comprises transmitting the first OFDM downlink transmission via at least the first time-frequency channel and the second OFDM downlink transmission via at least the first time-frequency channel. 24. A method comprising: receiving, from a first node, first feedback indicative of first weighting information;receiving, from a second node, second feedback indicative of second weighting information;determining, based at least in part on the first feedback and the second feedback, a plurality of weights; andtransmitting, by a multiple-input multiple-output (MIMO)-capable third node, via one or more antennas of a plurality of antennas and using orthogonal frequency division multiplexing (OFDM): first data, associated with the first node, using at least a first weight of the plurality of weights; andsecond data, associated with the second node, using at least a second weight of the plurality of weights,wherein the transmitting the first data is time and frequency coincident with the transmitting the second data. 25. The method of claim 24, wherein the first weighting information identifies a first weighting to be used for transmission by the MIMO-capable third node and the second weighting information identifies a second weighting to be used for transmission by the MIMO-capable third node. 26. The method of claim 24, wherein the first feedback is based at least in part on interference observed by the first node and the second feedback is based at least in part on interference observed by the second node. 27. The method of claim 24, wherein the transmitting comprises transmitting at least the first data and the second data using a multiple access scheme. 28. The method of claim 24, wherein the transmitting the first data time and frequency coincident with the transmitting the second data comprises transmitting the first data via at least a first time-frequency channel and the second data via at least the first time-frequency channel. 29. The method of claim 24, wherein the first data comprises a first OFDM symbol and the second data comprises a second OFDM symbol. 30. The method of claim 24, wherein the transmitting comprises transmitting the first data and the second data via different antennas of the plurality of antennas.
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