Methods and devices for narrowband communications
AssigneeIntel Corporation
InventorsJose Cesares Cano, Goeran Oekvist, Frank Sjoeberg, James Leblanc, Magnus Lundberg Nordenvaad
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Abstract
A communication device includes a measurement engine configured to perform a radio measurement to obtain a reception metric, a power reduction database configured to identify a potential power reduction from a plurality of power reductions, a metric scaler configured to scale the reception metric to compensate for the potential power reduction to obtain a reduced reception metric, and a transmit controller configured to select a transmit power or a transmit repetition count for a radio frequency transceiver based on the reduced reception metric.
Claims10
A wireless communication device comprising one or more processors configured to:
- determine a rough time offset estimate for a target synchronization signal in a received signal;
- extract a plurality of extracted windows from the received signal based on the rough time offset estimate;
- generate a matrix with frequency-domain cross-correlations between the plurality of extracted windows and the target synchronization signal;
- and
- determine a refined time offset estimate and a frequency offset estimate based on a maximum-valued element of the matrix.
A scan engine comprising one or more processors configured to:
- determine a cross-correlation between a received signal on a scan target center frequency and a target synchronization signal;
- and
- determine a peak value and a mean value of the cross-correlation, determine a detection metric as a ratio of the peak value to the mean value, and report the detection metric as a scan result for the scan target center frequency to a protocol stack.
A communication device comprising one or more processors configured to execute a protocol stack, the one or more processors configured to:
- determine a cross-correlation between a baseband signal on a scan target center frequency and a target synchronization signal, determine a peak value and a mean value of the cross-correlation, determine a detection metric as a ratio of the peak value to the mean value, and report the detection metric as a scan result for the scan target center frequency to the protocol stack;
- and
- select one or more search target center frequencies for cell search based on the detection metric.
Dependencies are inferred from the claim text.