Patent attributes
Methods for dynamic allocation of reference signals (RS) may be provided. For example, rather than or in addition to using a pre-defined resource element (RE) mapping for determining reference signal locations within a time-frequency grid, a WTRU may receive one or more dynamic indications (e.g., downlink control information received via a physical downlink control channel) that indicate the position of reference signals and/or associate a first reference signal with a second reference signal. For example, the indicated association may indicate that the first and second reference signals were sent by the base station using the same precoder. The association may indicate that first and second reference signals may be used together for channel estimation.
