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US 11,777,563 B2Granted
Broadcast signal transmission method, broadcast signal transmission apparatus, broadcast signal reception method, and broadcast signal reception apparatus
AssigneeSun Patent Trust
InventorsYutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
Life of this patent
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Abstract
Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a precoding weight by a baseband signal after a first mapping and a baseband signal after a second mapping and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.
Claims4
An integrated circuit comprising:
- at least one input which, in operation, inputs an input signal;
- and
- control circuitry coupled to the at least one input, the control circuitry which, in operation, controls receiving first transmission symbols, second transmission symbols, and control information symbols for specifying one of a plurality of precoding methods that was used by a base station apparatus to generate the first transmission symbols and the second transmission symbols, wherein the plurality of precoding methods includes a first precoding method where a fixed precoding matrix is used, a second precoding method where a precoding matrix with a phase shift is used, an amount of the phase shift being switched periodically and a third precoding method for spatial multiplexing;
- and
- a signal processor for decoding the first transmission symbols and the second transmission symbols based on the control information symbols to obtain first data symbols and second data symbols, wherein a phase shift is applied to one of the first data symbols and the second data symbols.
2 more elements
Dependencies are inferred from the claim text.