Radio receiver, signal processing method and program product
AssigneeRenesas Electronics Corporation
InventorTatsuhito Saitou
Life of this patent
Estimating the term…
Abstract
A radio receiver receives a signal transmitted through a radio transmission path. In the signal, a no-signal interval is inserted between orthogonal frequency division multiplexed (OFDM) symbols. The radio receiver includes a determining unit to determine an overlap-addition number based on delay characteristics of a received signal, and an adder to add data corresponding to the overlap-addition number determined by the determining unit out of data received in the no-signal interval to a top portion of an OFDM symbol of the received signal.
Claims6
A radio receiver to receive a signal transmitted through a radio transmission path, the signal containing a no-signal interval and an orthogonal frequency division multiplexed (OFDM) symbol, the OFDM symbol starting from a first time point and finishing at a second time point, the no-signal interval starting from the second time point and finishing at a third time point, the radio receiver comprising:
- a determining unit configured to determine an overlap-addition number based on delay characteristics of the signal received through the radio transmission path;
- an adder configured to sum data corresponding to the overlap-addition number out of data received in the no-signal interval with a top portion of the OFDM symbol within the first and second time points;
- and
- a calculating unit configured to calculate an evaluation parameter of the delay characteristics based on a correlation calculation result between the received signal and a known reference signal,
- wherein the determining unit determines an overlap-addition number based on the evaluation parameter and compares the evaluation parameter with a prescribed threshold and determines the overlap-addition number based on a comparison result.
A radio receiver to receive a signal transmitted through a radio transmission path, the signal containing a no-signal interval and an orthogonal frequency division multiplexed (OFDM) symbol, the OFDM symbol starting from a first time point and finishing at a second time point, the no-signal interval starting from the second time point and finishing at a third time point, the radio receiver comprising:
- a determining unit configured to determine an overlap-addition number based on delay characteristics of the signal received through the radio transmission path;
- an adder configured to sum data corresponding to the overlap-addition number out of data received in the no-signal interval with a top portion of the OFDM symbol within the first and second time points;
- and
- a calculating unit configured to calculate an evaluation parameter of the delay characteristics based on a correlation calculation result between the received signal and a known reference signal, wherein
- the determining unit determines an overlap-addition number based on the evaluation parameter,
- wherein the determining unit determines the overlap-addition number to be used in the adder by selecting an overlap-addition number associated with a multiplication result obtained by multiplying the evaluation parameter by a prescribed coefficient, and by limiting the multiplication result to be less than a predetermined limit value.
Dependencies are inferred from the claim text.