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User Cooperation is a promising technology to obtain diversity gain at terminals. According to the traditional decode-and-forward scheme, relay node help to transmit source node's information with fixed number of modulation symbols all the time. It is not optimal in view of spectral efficiency, especially when the channel state is good. This paper introduces the adaptive DF scheme based on the minus...
Cooperative communication is a promising technology to obtain diversity gain at user terminals. According to the traditional coded cooperation scheme, it is hard for relay node to know the optimal number of new parity bits to relay. This paper introduces the Adaptive Coded Cooperation (ACC) scheme for accurate prediction based on the Mutual Information model. The reliability requirement is satisfied,...
This paper proposes an adaptive mode and modulation coding switching (AMMCS) scheme for multiple-input multiple-output (MIMO) multicasting system. More specifically, in addition to the adaptively chosen modulation and error coding, two types of MIMO modes are adaptively switched, i.e., between spatial multiplexing (SM) mode, which can achieve higher data rate, and spatial diversity (SD) mode, which...
An accurate and simple link quality model is of utmost importance in link adaptation (LA) design. Our previous work in has verified the good accuracy of the mutual information (MI) model for rate compatible (RC) LDPC coded OFDM system. In this paper, the MI model is used to predict the retransmission length T of two hybrid ARQ schemes, partial chase combining (PCC) and incremental redundancy (IR)...
An precise but simple link quality model is crucial to improve the accuracy and flexibility of link adaptation design of LDPC coded OFDM system, because it acts as a link-to-system interface which provides system simulator immediately the BLER performance of a certain modulation and coding scheme corresponding to the current SINR states, which is an instantaneous vector. This contribution extends...
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