# US 12,119,896 B2 · Transmission device, transmission method, receiving device and receiving method

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- Number: US 12,119,896 B2
- Document ID: US12119896B2
- Status: Granted
- Kind: B2
- Application number: 18/218,668
- Filed: 2023-07-06
- Published: 2023-10-26
- Granted: 2024-10-15
- Earliest claimed: 2014-02-07
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Tomohiro Kimura; Yutaka Murakami; Mikihiro Ouchi
- Web page: https://patentgrep.com/patent/US12119896B2

## CPC

- H04B 7/0413: MIMO systems
- H04B 1/16: Circuits
- H04B 7/0404: the mobile station comprising multiple antennas, e.g. to provide uplink diversity
- H04B 7/0697: {using spatial multiplexing}
- H04B 7/0874: {using subgroups of receive antennas}
- H04N 21/2365: Multiplexing of several video streams
- H04N 21/42615: {involving specific demultiplexing arrangements}
- H04N 21/4263: {involving specific tuning arrangements, e.g. two tuners}
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 16/26: Cell enhancers {or enhancement}, e.g. for tunnels, building shadow
- H04W 16/28: using beam steering
- H04W 76/40: for selective distribution or broadcast
- H04B 7/10: Polarisation diversity; Directional diversity
- H04B: TRANSMISSION
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

By a transmission method according to one aspect of the present disclosure, in a broadcasting system that generates a first broadcasting signal and a second broadcasting signal by performing multi-antenna encoding on program data, and wirelessly transmits a first broadcasting signal and a second broadcasting signal, a first transmit station transmits the first broadcasting signal, a second transmit station transmits the second broadcasting signal, the first transmit station and the second transmit station transmit the first broadcasting signal and the second broadcasting signal to an overlapping area at an identical time using an overlapping frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and arrangement of the first transmit station differs from arrangement of the second transmit station.

## Claims

### Claim 1

A reception device that receives broadcasting data, the reception device comprising:
a receiver configured to receive a first broadcasting signal and a second broadcasting signal from a first transmit station and a second transmit station, respectively, the first broadcasting signal and the second broadcasting signal being transmitted at an identical time and at an identical frequency band, polarized wave of the first broadcasting signal differing from polarized wave of the second broadcasting signal, the first broadcasting signal and the second broadcasting signal being generated based on first orthogonal frequency division multiplexing (OFDM) symbols and second OFDM symbols, respectively; and
circuitry configured to decode the first broadcasting signal and the second broadcast signal to generate the broadcasting data, wherein
in the first broadcasting signal and the second broadcasting signal, pilots are inserted in the first OFDM symbols and the second OFDM symbols, and
density of the pilots in a frequency direction in one of the first OFDM symbols is lower than density of the pilots in the frequency direction in one of the second OFDM symbols.