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-0927495 (2007-10-29) |
등록번호 | US-8089853 (2012-01-03) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 1 인용 특허 : 552 |
Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a receiver configured to receive a waveform comprising a plurality of spectrally overlapping carrier signals from at least two of a plurality of remote units, wherein
Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a receiver configured to receive a waveform comprising a plurality of spectrally overlapping carrier signals from at least two of a plurality of remote units, wherein the plurality of spectrally overlapping carrier signals are modulated using an inverse Fourier transform algorithm; a transmitter; a processor coupled to the transmitter, wherein the processor outputs data for transmission to the transmitter, wherein the processor applies an inverse Fourier transform algorithm to the data provided to the transmitter; a controller programed to instruct the transmitter to transmit a predetermined identifier on at least one of the spectrally overlapping carrier signals, the predetermined identifier identifying to a first remote unit a range of the plurality of spectrally overlapping carrier signals for the first remote unit to receive control information.
1. A multi-carrier modem, the modem comprising: a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals;a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals;a proces
1. A multi-carrier modem, the modem comprising: a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals;a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals;a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform to the data transmitted by the transmitter;a controller programmed to instruct the receiver to scan a first range of the plurality of spectrally overlapping carrier signals for a first time period, wherein when an predetermined identifier is not received during the first time period, the controller is programmed to instruct the receiver to scan a second range of the plurality of spectrally overlapping carrier signals. 2. The modem of claim 1, the controller further programmed to instruct the transmitter to transmit an adjustment instruction modulated using the inverse Fourier transform to the at least one of the plurality of remote units, the adjustment instruction instructing the at least one of the plurality of remote units to vary a phase of transmissions transmitted from the at least one of the plurality of remote units. 3. The modem of claim 1, wherein the inverse Fourier transform is based on one of an inverse Fast Fourier Transform (FFT) and an inverse Discrete Fourier Transform (DFT).
Copyright KISTI. All Rights Reserved.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.