Improved precoding

There is provided a method at a network node of a communication network, the method comprising: receiving an uplink reference signal from a user equipment; estimating delay information on a delay distribution of a communication channel between the user equipment and the network node and spatial information on the communication channel based on the received uplink reference signal; applying both the delay information and the spatial information to precoding of the at least one downlink reference signal; transmitting the at least one pre-coded downlink reference signal to the user equipment; and receiving channel information from the user equipment in response to the transmission of the at least one pre-coded downlink reference signal, the channel information indicating at least non-zero coefficients of the at least one channel transport layer. 提供了一种在通信网络的网络节点处的方法，该方法包括：从用户设备接收上行链路参考信号；基于所接收的上行链路参考信号估计关于用户设备与网络节点之间的通信信道的延迟分布的延迟信息和关于通信信道的空间信息；将延迟信息和空间信息两者应用于至少一个下行链路参考信号的预编码；向用户设备传输至少一个预编码下行链路参考信号；以及作为对至少一个预编码下行链