# US 10,484,058 B2 · Transmission method and transmission device

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- Number: US 10,484,058 B2
- Document ID: US10484058B2
- Status: Granted
- Kind: B2
- Application number: 15/747,339
- Filed: 2016-07-19
- Published: 2018-08-02
- Granted: 2019-11-19
- Earliest claimed: 2015-07-30
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Yutaka Murakami; Tomohiro Kimura; Mikihiro Ouchi; Hiroyuki Motozuka
- Web page: https://patentgrep.com/patent/US10484058B2

## CPC

- H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B 7/0413: MIMO systems
- H04B 7/0615: {of weighted versions of same signal}
- H04B 7/0682: {using phase diversity (e.g. phase sweeping)}
- H04H 20/423: {Transmitter side}
- H04J 11/00: Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence)
- H04L 1/0041: {Arrangements at the transmitter end}
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 1/0083: {Formatting with frames or packets; Protocol or part of protocol for error control}
- H04L 1/0003: {by switching between different modulation schemes}
- H04B: TRANSMISSION
- H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A transmission method includes encoding processing that generates an encoded block, modulation processing that generates symbols from the encoded block, phase change processing that changes the phase of the symbols, and transmission processing that arranges the symbols in data carriers and transmits the symbols. The transmission processing configures a frame by arranging symbol groups in order in the frequency direction and transmits the frame. The symbol groups each include a symbol generated from a first encoded block and a symbol generated from a second encoded block. The phase change processing includes changing the phase of symbols the same symbol group using the same phase change value.

## Claims

### Claim 1

A transmission method, comprising:
encoding processing that generates a first encoded block and a second encoded block using a forward error correction coding scheme;
modulation processing that generates a plurality of first symbols and a plurality of second symbols from the first encoded block and generates a plurality of third symbols and a plurality of fourth symbols from the second encoded block;
phase change processing that changes a phase of the plurality of second symbols and the plurality of fourth symbols;
orthogonal frequency division multiplexing (OFDM) symbol generation processing that generates a first OFDM symbol by arranging the first symbols and the third symbols on data carriers of the first OFDM symbol and generates a second OFDM symbol by arranging the second symbols and the fourth symbols; and
transmitting processing that transmits the first OFDM symbol and the second OFDM symbol by using a plurality of antennas, wherein
in the first OFDM symbol, the first symbols are allocated with a predetermined period and the third symbols are allocated on data carriers adjacent to the first symbols,
in the second OFDM symbol, the second symbols are allocated with the predetermined period and the fourth symbols are allocated on data carriers adjacent to the second first symbols,
amounts of the phase change applied to the second symbols are regularly changed in a frequency direction, and
an amount of the phase change applied to each of the fourth symbols is same as that applied to each of the adjacent second symbols.

### Claim 2

A transmission device, comprising:
an encoding processor that generates a first encoded block and a second encoded block using a forward error correction coding scheme;
a modulation processor that generates a plurality of first symbols and a plurality of second symbols from the first encoded block and generates a plurality of third symbols and a plurality of fourth symbols from the second encoded block;
a phase change processor that changes a phase of the plurality of second symbols and the plurality of fourth symbols;
an orthogonal frequency division multiplexing (OFDM) symbol generation processor that generates a first OFDM symbol by arranging the first symbols and the third symbols on data carriers of the first OFDM symbol and generates a second OFDM symbol by arranging the second symbols and the fourth symbols; and
a transmitting processor that transmits the first OFDM symbol and the second OFDM symbol by using a plurality of antennas, wherein
in the first OFDM symbol, the first symbols are allocated with a predetermined period and the third symbols are allocated on data carriers adjacent to the first symbols,
in the second OFDM symbol, the second symbols are allocated with the predetermined period and the fourth symbols are allocated on data carriers adjacent to the second symbols,
amounts of the phase change applied to the second symbols are regularly changed in a frequency direction, and
an amount of the phase change applied to each of the fourth symbols is same as that applied to each of the adjacent second symbols.