Back to results
US 12,738,992 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
Estimating the term…
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
A terminal apparatus comprising:
- a receiver which, in operation, receives a first transmission symbol sequence and a second transmission symbol sequence from a communication partner apparatus, which are generated by applying a precoding matrix to a first symbol sequence and a second symbol sequence, the precoding matrix being one of a first precoding matrix with a phase shift whose amount is switched symbol by symbol and a second precoding matrix without the phase shift, and wherein the phase shift of the first precoding matrix is applied to one of the first symbol sequence and the second symbol sequence;
- and
- a signal processor which, in operation, decodes the first transmission symbol sequence and the second transmission symbol sequence using the precoding matrix to obtain the first symbol sequence and the second symbol sequence.
A communication method comprising:
- receiving a first transmission symbol sequence and a second transmission symbol sequence from a communication partner apparatus, which are generated by applying a precoding matrix to a first symbol sequence and a second symbol sequence, the precoding matrix being one of a first precoding matrix with a phase shift whose amount is switched symbol by symbol and a second precoding matrix without the phase shift, and wherein the phase shift of the first precoding matrix is applied to one of the first symbol sequence and the second symbol sequence;
- and
- decoding the first transmission symbol sequence and the second transmission symbol sequence using the precoding matrix to obtain the first symbol sequence and the second symbol sequence.
Dependencies are inferred from the claim text.