Abstract:
완화된 제로 포싱을 기반으로 하는 협력 다중 셀 MIMO 빔 형성 송신 방법을 개시한다. 상기 방법은 완화된 제로 포싱 빔 형성 방법을 통해 사용자 단말들에 전송할 빔을 설계하는 단계; 및 설계된 상기 빔을 송신하는 단계를 포함한다. 또한, 본 발명에 따른 정보 전송 방법은 특정 방정식을 통해 송신 빔을 형성하는 단계; 및 형성된 상기 송신 빔을 이용하여 정보를 전송하는 단계를 포함한다.
Abstract:
다중입력 단일출력 간섭채널에서 채널분포 정보와 간섭 수준 조정을 이용한 빔포밍 장치 및 방법이 개시된다. 채널분포 정보를 수신받는 입력부 및 수신받은 채널분포 정보 및 설정된 최대 허용 통신두절(outage) 확률을 이용하여 완화 제로포싱 조건의 초기값을 설정하고, 설정된 초기값을 이용하여 설정된 초기값에 대한 최적의 송신 빔 벡터를 형성하며, 형성된 송신 빔 벡터를 이용하여 완화 제로포싱 조건을 업데이트하고, 업데이트된 완화 제로포싱 조건을 이용하여 업데이트된 완화 제로포싱 조건에 대한 최적의 송신 빔 벡터를 형성하는 제어부를 포함할 수 있다.
Abstract:
An apparatus and a method for adaptive code acquisition are provided to improve the performance of a code acquisition system and obtain theories suitable to design the system actually. Adaptive code acquisition is performed by applying a detection method, which uses a cell average constant false alarm rate scheme, to signals received from a plurality of antennas, in a non-homogeneous fading circumstance. The cell average constant false alarm rate scheme uses a detection rate expressed by the following equation; PD=ICA(SP)(1-ICA(0P))^(M-1). The cell average constant false alarm rate scheme uses a false alarm rate expressed by the following equations; PFA=1/LPx(ICA(0P)(1-ICA(SP))(1-ICA(0P))^(M-2))+((LP-1)/LP)x(ICA(0P)(1-ICA(0P))^(M-1)).
Abstract:
The present invention relates to a method of designing a beamformer which is suitable for a massive multiple-input multiple-output (MIMO) environment, according to the present invention, a method of designing a beamformer based on the k-Gaussianity in a massive MIMO system having similar performance compared to an existing eigen beamforming method while having the similar hardware complexity compared to an existing antenna selection method by simultaneously solving disadvantages that the existing antenna selection method has an advantage in hardware complexity while its performance is bad in a view of the total data rate and the existing eigen beamforming method has the optimal performance while its hardware complexity is bad. [Reference numerals] (AA) Start; (BB) For all i = 1......M; (CC) Updating as; (DD) End; (S10) Generating V randomly; (S20) Updating as V = V - μ��(V); (S30) For all i=1, ...,,M, updating as v_i = T_λμ (v_i); (S60) For all i = 1,...,M, updating as v_i=P_k(v_i); (S70) For all i=1,...,M, updating as vi=v_i/¦¦v_i¦¦2, where ��f(V)=P/M H^H(I+P/M HVV^H H^H)^-1HV, R_n is a data ratio of n^th iteration
Abstract:
Disclosed are a zero-forcing beamforming device and a method therefor based on k-regularity in a multiple input single output (MISO) broadcast channel. The zero-forcing beamforming device can comprise: a storage unit which stores channel information and the number of antenna to be selected by a data stream (RF chain); and a control unit which, based on the stored channel information and the stored number of antenna, optimizes zero-forcing beamforming by removing rows enabling a best performance for a remaining matrix, which is obtained by removing rows from a matrix of the channel information until the number of rows is the same as the number of antenna, one by one, or by removing rows enabling a minimum performance degradation for a matrix, which is obtained by removing rows from the matrix of the channel information until the number of rows is the same as the number of antenna, one by one.
Abstract:
본 발명은 복수의 이동체의 경로를 계획하는 장치 및 방법에 관한 것으로, 본 발명의 일 실시예에 따른 복수의 이동체(moving body)의 경로를 계획하는 방법은, 하나의 이동체에 대하여 각각 자신만의 좌표를 고려하여 시작점으로부터 도착점까지의 경로를 산출하고, 산출된 경로 상에 다른 이동체의 시작점 또는 도착점이 존재하는지 여부를 검사함으로써 이동체들 간의 충돌 발생 가능성을 판단하고, 판단 결과 충돌 발생 가능성이 존재하는 경우 산출된 경로 상에 존재하는 다른 이동체의 시작점 또는 도착점을 임시로 이동시킴으로써 충돌 발생 가능성이 사라지는지 여부를 검사하며, 검사 결과에 따라 다른 이동체의 시작점 또는 도착점을 임시로 이동시키거나, 이동체 자신의 시작점을 이동시킴으로써 충돌이 발생하지 않는 경로를 재탐색하는 과정 중 어느 하나를 선택적으로 수행함으로써 상기 이동체의 경로를 결정한다.
Abstract:
PURPOSE: An outage based robust beam design method in a multiple-input multiple-output (MIMO) interference channel is provided to obtain outage probability of a MIMO channel and to maximize a transmission rate within given outage probability restriction using the outage probability. CONSTITUTION: An arbitrary transception beam with respect to given channel information and maximum allowable outage probability is set (210). The maximum rate tuple is obtained by message within the given maximum allowable outage probability with respect to the transception beam (220). A transmission beam with respect to the rate tuple and reception beam is designed (230). A reception beam is designed using the rate tuple and transmission beam (240). Each of the transmission beam and reception beam has unit length. [Reference numerals] (210) Select a random transception beam; (220) Obtain a maximum rate tuple of the beam within a maximum permittable outage rate range for each message; (230) Design a transmission beam regarding the rate tuple and a reception beam; (240) Design the reception beam using the rate tuple and the designed transmission beam; (AA) Start; (BB) End
Abstract:
PURPOSE: A beam design algorithm in an MIMO(Multiple Input Multiple Output) interference channel based on MSE(Mean Square Error) and method using the same are provided to realize low performance reduction by optimizing the MSE. CONSTITUTION: A signal received by each reception apparatus is displayed as mathematics in one or more transmission apparatuses(S10). When incomplete channel information exists in an interference channel, a modeling process is executed in order to equalize feedback errors(S20). A filter of the reception apparatus is applied to a reception signal in order to estimate an original signal(S30). A new type is created by applying an optimization method to the filter in order to consider MSE(S40).