Abstract:
본 발명은 STBC(Space Time Block Code) 스킴을 지원하는 송신기, 수신기에 관한 것으로서, UW(Unique Word) 기반의 전송 시퀀스에 따른 신호를 송신하고 수신된 신호에 따른 수신 시퀀스의 직교성(Orthogonality)을 복원하기 위해 UW 사용함으로써, 다이버시티 이득과 등화 이득을 동시에 얻을 수 있고 에러 전파(Error Propagation)없이 향상된 성능을 달성할 수 있도록 하는 UW 기반 SC 시스템에서 STBC 스킴을 지원하는 송신기, 수신기 및 그 방법을 개시한다. 본 발명에 따른 UW 기반 SC 시스템에서 STBC 스킴을 지원하는 송신기는 소정의 패턴에 의해 입력된 복수의 심볼들을 시공간 코드화를 사용하여 부호화하는 ST(Space Time) 인코더, 상기 부호화된 복수의 심볼들 중 제1 심볼의 전송 시퀀스에 제1 UW 를 삽입하여 제1 전송 시퀀스를 생성하는 제 1 UW 가산기, 및 상기 부호화된 복수의 심볼들 중 제2 심볼의 전송 시퀀스에 제2 UW를 삽입하여 제2 전송 시퀀스를 생성하는 제 2 UW 가산기를 포함하는 것을 특징으로 한다. UW(Unique Word), SC(Single Carrier), STBC(Space Time Block Code), FD-DFE(Frequency Domain-Decision Feedback Equalization)
Abstract:
PURPOSE: A dynamic channel feedback control method for cooperation multipoint transmission in a network multiple input-output system is provided to adaptively control the number of feedback bits in order to feedback a channel state between base stations and target terminals. CONSTITUTION: A terminal presumes a channel hk between a base station 1 and a terminal k and a channel hk between a base station 2 and a terminal k based on pilot 1(321). The base station 1 decides the size of the code book for the size of a codebook based on the states of the channel hk. The base station 1 constitutes the code book corresponding to the base station 1 and the code book corresponding to the base station 2(332). The base station 1 generates a CDI1(Channel Direction Information1) and CDI2(341).
Abstract:
PURPOSE: A method for controlling data tunnels for coordinated multi-point data transmission among base stations and transmitting data, and controlling device for the data tunnels are provided to supply efficient interface structure for inter-base station information sharing in a wireless network. CONSTITUTION: The resource of an estimated range for a cooperative multi-point transmission among base stations is reserved(402). If the data rate over the average value of the estimated range is required in the data transmission procedure through a reserved resource, the required data rate is compared with a maximum value(404,405). If the required data rate is over the maximum value, the use of the residual resources allocated to other session within the maximum value of the estimated range is controlled(410).
Abstract:
An apparatus and a method for transmitting and receiving a space block coding signal are provided to obtain an efficient transmission diversity gain by detecting the multiuser interference by the multiuser detection. A multiuser interference offsetting unit(207) offsets the multiuser interference of the reception signal by using a recovery signal for the reception signal. A linear coupling unit(209) linearly couples a first signal and a second signal successively transmitted from two different transmission antennas or more among the received signal offsetting the multi user interference. An equalizer(213) performs the frequency domain equalization by applying two different equalization coefficients to the first and second signals which are linearly coupled.
Abstract:
An ICI(InterCarrier Interference) removing method in an MIMO-OFDM(Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing) system and a receiving apparatus using the same are provided to perform CPR(Cyclic Prefix Reconstruction) by using an I-CMOS(Improved-Capacity Mapping Ordering Scheme) and an I-MMSE(Improved-Minimum Mean-Square Error), thereby significantly restraining ICI(InterCarrier Interference) of the MIMO system with an insufficient CP(Cyclic Prefix). A receiving apparatus for removing ICI(InterCarrier Interference) in an MIMO(Multiple-Input Multiple-Output) system comprises the followings: a detection order(225) which determines the detection order of each subcarrier according to the order of SINRs(Signal to Interference plus Noise Ratios) based on an I-CMOS(Improved-Capacity Mapping Ordering Scheme); a detector which receives advance information from a receiving vector of the subcarrier and a decoder according to the determined detection order and repeatedly estimates signals; and the decoder which decodes a signal of which the ICI is removed according to the estimated detection signal.
Abstract:
무선네트워크에서의송신전력을제어하는방법및 장치가제공된다. 대상기지국은이웃기지국과협력적으로송신전력을제어함으로써대상단말들의서비스품질에대한만족도를향상할수 있다. 그리고대상기지국은대상단말들의서비스품질에대한만족도의향상필요여부에따라이웃기지국과협력적으로송신전력을제어할지여부를결정할수 있다.