Pre-coding method and transmitter
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 over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.
Claims14
A communication apparatus comprising:
- a receiver, which, in operation, receives a first precoded signal and a second precoded signal from a communication partner apparatus, wherein a precoding matrix is applied at the communication partner apparatus on a first symbol sequence and a second symbol sequence to generate the first precoded signal and the second precoded signal, the precoding matrix having one or more matrix elements that change periodically, wherein a phase change is applied to only one of the first precoded signal and the second precoded signal during the application of the precoding matrix;
- and
- circuitry which, in operation, decodes the first precoded signal and the second precoded signal using the precoding matrix.
A communication method for a communication apparatus, the communication method comprising:
- receiving a first precoded signal and a second precoded signal from a communication partner apparatus, wherein a precoding matrix is applied at the communication partner apparatus on a first symbol sequence and a second symbol sequence to generate the first precoded signal and the second precoded signal, the precoding matrix having one or more matrix elements that change periodically, wherein a phase change is applied to only one of the first precoded signal and the second precoded signal during the application of the selected precoding matrix;
- and
- decoding the first precoded signal and transmits the second precoded signal using the precoding matrix.
Dependencies are inferred from the claim text.