Signal measurements based on sync signals
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsBengt Lindoff, Ylva Jading, Walter Müller
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for determining a load estimate in a receiver in an orthogonal frequency division multiplex (OFDM) communication system include detecting at least one OFDM symbol of at least one predetermined synchronization signal; determining a signal strength measure based on the detected at least one synchronization symbol; detecting at least one OFDM symbol nearby to the OFDM symbol of the at least one predetermined synchronization signal; determining a total signal power measure based on the detected at least one nearby OFDM symbol; and determining the load estimate based on the signal strength measure and the total signal power measure.
Claims15
A method of determining a load estimate in a receiver in an orthogonal frequency division multiplex (OFDM) communication system, comprising:
- detecting at least one OFDM symbol of at least one predetermined synchronization signal;
- determining a signal strength measure based on the detected at least one synchronization symbol;
- detecting at least one OFDM symbol nearby to the OFDM symbol of the at least one predetermined synchronization signal, wherein communication channel characteristics for a nearby OFDM symbol are substantially the same as communication channel characteristics for the at least one OFDM symbol of the at least one predetermined synchronization signal;
- determining a total signal power measure based on the detected at least one nearby OFDM symbol;
- and
- determining the load estimate based on the signal strength measure and the total signal power measure.
An apparatus in a receiver for determining a load estimate in an orthogonal frequency division multiplex (OFDM) communication system, comprising:
- a detector configured to recover at least one OFDM symbol of at least one predetermined synchronization signal and at least one OFDM symbol nearby to the OFDM symbol of the at least one predetermined synchronization signal, wherein communication channel characteristics for a nearby OFDM symbol are substantially the same as communication channel characteristics for the at least one OFDM symbol of the at least one predetermined synchronization signal;
- and
- a signal estimator configured to determine a signal strength measure based on the detected at least one synchronization symbol, to determine a total signal power measure based on the detected at least one nearby OFDM symbol, and to determine the load estimate based on the signal strength measure and the total signal power measure.
A non-transitory computer-readable medium having stored instructions that, when executed by a computer, cause the computer to carry out a method of determining a load estimate in a receiver in an orthogonal frequency division multiplex (OFDM) communication system, wherein the method comprises:
- detecting at least one OFDM symbol of at least one predetermined synchronization signal;
- determining a signal strength measure based on the detected at least one synchronization symbol;
- detecting at least one OFDM symbol nearby to the OFDM symbol of the at least one predetermined synchronization signal, wherein communication channel characteristics for a nearby OFDM symbol are substantially the same as communication channel characteristics for the at least one OFDM symbol of the at least one predetermined synchronization signal;
- determining a total signal power measure based on the detected at least one nearby OFDM symbol;
- and
- determining the load estimate based on the signal strength measure and the total signal power measure.
Dependencies are inferred from the claim text.