Qi Sun

TL;DR: In this paper, a non-codebook-precoding-based transmission method for a multi-input multi-output (MIMO) system is proposed, which comprises the following steps that: a transmitting end acquires the channel information of the previous time by using feedback or specific channel reciprocity of a time division duplexing (TDD) system, acquires a unitary matrix Q and a lower triangular matrix L in which elements on a diagonal are arranged in a descending order of the probability by performing sequential LQ decoding (SLQD) operation on the

TL;DR: In this article, a non-codebook precoding-based transmission method for a quick-time varying multi-input multi-output (MIMO) system is proposed, which is characterized by comprising the following steps of: for a receiving end, S1, receiving signals and pilot frequency sent by a transmitting end and subjected to simultaneous precoding, and finishing channel estimation according to the pilot frequency to acquire an equivalent channel Ht, equ; S2, performing ordering-based query language (QL) decomposition on the equivalent channel, Ht equ to acquire a perm

TL;DR: In this paper, a multi-user precoding method and a device combining a non-code book and a code book are presented, where users are grouped according to the reciprocity degree through measuring the channel reciprocity.

TL;DR: This work proposes decentralized relay coordination algorithms and corresponding channel state information (CSI) signaling concepts for weighted sum rate maximization, via linear downlink transceiver optimization in multiuser multi-relay MIMO network.