CELLULAR COMMUNICATION SYSTEM COMPUTATION OF RSRP IN THE PRESENCE OF LARGE FREQUENCY ERRORS

摘要

A Reference Signal Received Power (RSRP) value is produced from a received Orthogonal Frequency Division Multiplexed (OFDM) signal that comprises a plurality of reference symbols located at known sub-carrier frequencies and times within the received OFDM signal. RSRP value production involves, for each hypothesized error state selected from a plurality of different hypothesized error states, ascertaining a corresponding hypothesized RSRP value, and then using the hypothesized RSRP values as a basis for determining a value for use as the produced RSRP value (e.g., by selecting a maximum one of the hypothesized RSRP values as the produced RSRP value). In this technology, each of the hypothesized error states is a hypothesized frequency error paired with a hypothesized timing error and the corresponding hypothesized RSRP value is produced by adjusting one or more measured channel estimates as a function of the hypothesized error state.

主权项

1. A method of producing a Reference Signal Received Power (RSRP) value from a received Orthogonal Frequency Division Multiplexed (OFDM) signal that comprises a plurality of reference symbols located at known sub-carrier frequencies and times within the received OFDM signal, the method comprising:
for each hypothesized error state selected from a plurality of different hypothesized error states, ascertaining a corresponding hypothesized RSRP value, wherein:
each of the hypothesized error states is a hypothesized frequency error paired with a hypothesized timing error; andthe corresponding hypothesized RSRP value is produced by adjusting one or more measured channel estimates as a function of the hypothesized error state; and using the hypothesized RSRP values as a basis for determining a value for use as the produced RSRP value.