National Instruments Corporation
CONTROL MESSAGING OF COMMON PHASE ERROR (CPE) COMPENSATION PERFORMANCE LEVEL FOR FREQUENCY DIVISION MULTIPLEX (FDM) SYMBOLS IN WIRELESS COMMUNICATION SYSTEMS

Abstract:

A wireless base station or user equipment (BS or UE) includes a receiver configured to receive a frequency division multiplexed (FDM) symbol transmitted by another wireless BS or UE, and a processor. The processor is configured to process the received FDM symbol to obtain its equalized FDM data subcarriers, generate a CPE estimate using the equalized FDM data subcarriers, and send to the other wireless BS or UE control messages that indicate a CPE compensation performance level using the CPE estimate. The other wireless BS or UE is enabled by the control messages to adapt a density in time and/or frequency of embedded pilot symbols within FDM symbols subsequently transmitted to the wireless BS or UE.