Hereinafter, operation methods of a communication node in the communication system will be described. Even when a method (e.g., transmission or reception of a signal) to be performed at a first communication node among communication nodes is described, a corresponding second communication node may perform a method (e.g., reception or transmission of the signal) corresponding to the method performed at the first communication node. That is, when an operation of a terminal is described, a corresponding base station may perform an operation corresponding to the operation of the terminal. Conversely, when an operation of a base station is described, a corresponding terminal may perform an operation corresponding to the operation of the base station.
Chapter 2 Methods for Extending a Coverage of a Physical Uplink Shared Channel (PUSCH)
2.1 Methods for Enhancement in Spatial Domain
When a coverage of a PUSCH is not wide enough, it may be preferable to allocate resources so that a multiplexing gain for the PUSCH at a base station is improved. The multiplexing gain may be achieved by performing spatial multiplexing and/or pre-processing.
2.1.1 Codebook-Based Transmission Method