Transmission method based on non-codebook precoding in time-varying channel

TL;DR: In this paper, the authors proposed a precoding method comprising the following steps: a pilot signal transmitted by a transmitting end is received, channel state information estimation is performed according to the pilot signal to acquire a channel mean and a channel covariance; a prec coding matrix is calculated according to channel mean, and the transmitting end precodes a data signal needing to be transmitted according to precoding matrix.

TL;DR: In this article, the authors proposed a non-codebook pre-coding in a long-term evolution-advanced (LTE-A) system, which belongs to the field of wireless mobile communications.

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 paper, a method and device for transmitting coding indicator information, and a method for determining a precoding matrix are presented for solving the problem that resolution of codons in a codebook which is generated by combining beam vector subgroups and column selection cannot be adjusted flexibly.

TL;DR: In this paper, a precoding method for ascending MIMO systems with two transmitting antennas and two receiving antennas with the number more than or equal to 2 is proposed, which can improve system capacity after matching with a switch data stream and power distribution method.

TL;DR: In this paper, the authors proposed a precoding method for downlink multi-user multiple-input and multiple-output under a time division duplex (TDD) mode, which comprises the steps that: each user acquires a channel matrix Hi according to channel estimation, performs singular value decomposition SVD on Hi, and uses the Ui to precode the receiving terminal.