Abstract:
A multiuser power allocating method for multiplex transmission using the overlapped coding of the power allocation priority in a communications system is provided to increase the frequency reuse efficiency by accommodating a plurality of user terminals and dividing power. Power is especially allocated by a user terminal in order that it is satisfied the requirement specification of each user terminal(S202). The power allocation priority is determined in the power allocation according to the channel condition of each user terminal. The power allocation priority is given from the user terminal in which the channel condition is excellent and the user terminal in which the channel condition is bad(S201).
Abstract:
멀티레벨변조신호 기반의 검파 장치, 반복 수신 장치 및 이를 이용하는 방법이 개시된다. 이 장치는 적어도 하나의 멀티레벨변조 기반의 수신신호에 포함된 각 비트들의 채널응답을 추정하는 채널추정부; 상기 각 비트에 대해, 상기 비트를 제외한 나머지 비트들 중 적어도 하나를 선택하여, 상기 선택된 비트의 사전확률을 기초로 경판정하는 경판정부; 및 상기 경판정된 비트 성분이 제거된 수신신호 및 상기 추정된 채널응답을 기초로, 상기 각 비트에 대한 신뢰도를 산출하는 신뢰도 산출부를 포함한다. 본 발명에 따르면, 성능의 저하 없이, 검파에 따른 계산량을 줄일 수 있다.
Abstract:
A detector for a multi-level modulated signal, an iterative receiver for a multi-level modulated signal and a method using the same are provided to obtain enhanced capability with a simple computing quantity by using selective hard decision or soft decision of a binary area in a signal antenna or multi antenna wireless communication system. In a detector for a multi-level modulated signal, a channel estimating unit(152) estimates a channel response of each bit included in at least one multi-level modulation based received signal. A soft decision unit(156) selects at least one among remaining bits except for the above-described bit and softly decides with respect to the above-described each bit on the basis of a prior probability of the selected bit. A reliability computing unit computes a reliability of the each bit on the basis of the received signal of which the softly decided bit element is removed and the estimated channel response.