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 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0914088 (2018-03-07) |
등록번호 | US-10256879 (2019-04-09) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 0 인용 특허 : 504 |
Components, systems, and methods for reducing location-dependent destructive interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration are disclosed. Interference is defined as issues with received MIMO communications signals that can cause a MIMO
Components, systems, and methods for reducing location-dependent destructive interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration are disclosed. Interference is defined as issues with received MIMO communications signals that can cause a MIMO algorithm to not be able to solve a channel matrix for MIMO communications signals received by MIMO receivers in client devices. These issues may be caused by lack of separation (i.e., phase, amplitude) in the received MIMO communications signals. Thus, to provide amplitude separation of received MIMO communications signals, multiple MIMO transmitters are each configured to employ multiple transmitter antennas, which are each configured to transmit in different polarization states. In certain embodiments, one of the MIMO communications signals is amplitude adjusted in one of the polarization states to provide amplitude separation between received MIMO communications signals. In other embodiments, multiple transmitter antennas in a MIMO transmitter can be offset to provide amplitude separation.
1. A method of transmitting multiple-input, multiple-output (MIMO) communications signals, the method comprising: receiving a first optical downlink MIMO communications signal at a first amplitude over a first downlink communications medium;converting the first optical downlink MIMO communications s
1. A method of transmitting multiple-input, multiple-output (MIMO) communications signals, the method comprising: receiving a first optical downlink MIMO communications signal at a first amplitude over a first downlink communications medium;converting the first optical downlink MIMO communications signal to a first electrical downlink MIMO communications signal;transmitting the first electrical downlink MIMO communications signal over a first MIMO transmitter antenna in a first polarization;receiving a second optical downlink MIMO communications signal at the first amplitude;converting the second optical downlink MIMO communications signal to a second electrical downlink MIMO communications signal;transmitting the second electrical downlink MIMO communications signal over a second MIMO transmitter antenna in a second polarization;receiving a third optical downlink MIMO communications signal at the first amplitude;converting the third optical downlink MIMO communications signal to a third electrical downlink MIMO communications signal;transmitting the third electrical downlink MIMO communications signal over a third MIMO transmitter antenna in the first polarization;receiving a fourth optical downlink MIMO communications signal;converting the fourth optical downlink MIMO communications signal to a fourth electrical downlink MIMO communications signal; andtransmitting the fourth electrical downlink MIMO communications signal at a second amplitude, over a fourth MIMO transmitter antenna in the second polarization. 2. The method of claim 1, wherein: transmitting the first electrical downlink MIMO communications signal comprises transmitting to a line-of-sight (LOS) wireless client; andtransmitting the second electrical downlink MIMO communications signal comprises transmitting to a LOS wireless client. 3. The method of claim 2, wherein: transmitting the third electrical downlink MIMO communications signal comprises transmitting to a LOS wireless client; andtransmitting the fourth electrical downlink MIMO communications signal comprises transmitting to a LOS wireless client. 4. The method of claim 3, further comprising amplitude adjusting the fourth optical downlink MIMO communications signal. 5. The method of claim 4, further comprising receiving the fourth optical downlink MIMO communications signal at the second amplitude modified from the first amplitude in a central unit. 6. The method of claim 4, further comprising receiving the fourth optical downlink MIMO communications signal at the second amplitude modified from the first amplitude in the fourth downlink communications medium. 7. The method of claim 1, further comprising amplitude adjusting the fourth optical downlink MIMO communications signal. 8. The method of claim 7, further comprising receiving the fourth optical downlink MIMO communications signal at the second amplitude modified from the first amplitude in a central unit. 9. The method of claim 7, further comprising receiving the fourth optical downlink MIMO communications signal at the second amplitude modified from the first amplitude in the fourth downlink communications medium. 10. The method of claim 1, further comprising receiving the fourth optical downlink MIMO communications signal at the second amplitude modified from the first amplitude in a central unit. 11. The method of claim 1, further comprising receiving the fourth optical downlink MIMO communications signal at the second amplitude modified from the first amplitude in the fourth downlink communications medium.
Copyright KISTI. All Rights Reserved.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.