Method, apparatus, and system for transmitting and receiving information of an uncoded channel in an orthogonal frequency division multiplexing system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04L-005/00
H04J-013/00
H04L-001/00
출원번호
US-0011314
(2013-08-27)
등록번호
US-9413510
(2016-08-09)
우선권정보
KR-10-2005-0037777 (2005-05-04)
발명자
/ 주소
Kwon, Hwan-Joon
Lee, Ju-Ho
Cho, Joon-Young
Han, Jin-Kyu
Kim, Dong-Hee
Cho, Yun-Ok
출원인 / 주소
Samsung Electronics Co., Ltd.
대리인 / 주소
Jefferson IP Law, LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A method apparatus and system for efficiently transmitting and receiving channels are provided in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM). A multiplexing scheme differs according to a channel when a transmitter transmits a packet data channel, a com
A method apparatus and system for efficiently transmitting and receiving channels are provided in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM). A multiplexing scheme differs according to a channel when a transmitter transmits a packet data channel, a common control channel and a control channel designated for a particular user. Uncoded 1-bit information is broadly dispersed in frequency and time domains using multiplexing technology for maximizing diversity gain in a channel for transmitting information of at least one bit to a particular user like an acknowledgement (ACK) channel. The transmitter converts a sequence obtained by multiplexing multiple bits to be transmitted to a plurality of users to parallel signals, and broadly disperses the parallel signals in the time and frequency domains. When the uncoded 1-bit information is transmitted, reception reliability is improved because channel coding and transmission are efficiently performed using a small amount of resources.
대표청구항▼
1. A method for transmitting acknowledgement (ACK) information by a base station in an orthogonal frequency division multiplexing (OFDM) system, the method comprising: transforming ACK information separately from other control information;mapping the transformed ACK information to first subcarriers
1. A method for transmitting acknowledgement (ACK) information by a base station in an orthogonal frequency division multiplexing (OFDM) system, the method comprising: transforming ACK information separately from other control information;mapping the transformed ACK information to first subcarriers in a pattern for increasing diversity gain of the transformed ACK information;encoding the other control information according to a channel encoding scheme without a transform;mapping the encoded other control information to second subcarriers; andtransmitting the transformed ACK information and other control information,wherein the transform comprises one of an unitary transform, a Hadamard transform, and a fast fourier transform (FFT). 2. The method of claim 1, wherein the transforming of the ACK information is performed by applying a walsh code from a set of walsh codes. 3. The method of claim 1, wherein the transforming of the ACK information is performed using a spreading factor as a system parameter. 4. An apparatus for transmitting acknowledgement (ACK) information by a base station of an orthogonal frequency division multiplexing (OFDM) system, the apparatus comprising: a transmitter configured to transmit a signal; anda controller configured to: transform ACK information separately from other control information,map the transformed ACK information to first subcarriers in a pattern for increasing diversity gain of the transformed ACK information,encode the other control information according to a channel encoding scheme without a transform,map the encoded other control information to second subcarriers, andtransmit the transformed ACK information and the other control information,wherein the transform comprises one of an unitary transform, a Hadamard transform, and a fast fourier transform (FFT). 5. The apparatus of claim 4, wherein the controller is further configured to transform the ACK information by applying a walsh code from a set of walsh codes. 6. The apparatus of claim 4, wherein the controller is further configured to transform the ACK information using a spreading factor as a system parameter. 7. An apparatus for receiving acknowledgement (ACK) information by a terminal of an orthogonal frequency division multiplexing (OFDM) system, the apparatus comprising: a receiver configured to receive a signal; anda controller configured to: receive ACK information and other control information through a radio channel,perform an inverse transform on the received ACK information, anddecode the received other control information according to a channel encoding scheme,wherein the other control information is encoded according to the channel encoding scheme without a transform prior to transmission and the ACK information is transmitted on a plurality of subcarriers mapped in a pattern to increase diversity prior to transmission, andwherein the transform comprises one of an unitary transform, a Hadamard transform, and a fast fourier transform (FFT). 8. The apparatus of claim 7, wherein the inverse transform on the received ACK information is performed by applying a walsh code from a set of walsh codes. 9. The apparatus of claim 7, wherein the inverse transform on the received ACK information is performed using a spreading factor as a system parameter. 10. A method for receiving acknowledgement (ACK) information by a terminal in an orthogonal frequency division multiplexing (OFDM) system, the method comprising: receiving ACK information and other control information through a radio channel,performing an inverse transform on the received ACK information, anddecoding the received other control information according to a channel encoding scheme,wherein the other control information is encoded according to the channel encoding scheme without a transform prior to transmission and the ACK information is transmitted on a plurality of subcarriers mapped in a pattern to increase diversity prior to transmission, andwherein the transform comprises one of an unitary transform, a Hadamard transform, and a fast fourier transform (FFT). 11. The method of claim 10, wherein the inverse transform on the received ACK information is performed by applying a walsh code from a set of walsh codes. 12. The method of claim 10, wherein the inverse transform on the received ACK information is performed using a spreading factor as a system parameter.
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