Transmission device, transmission method, reception device, and reception method

Patent metadata

Field	Value
Publication number	US-2016337012-A1
Application number	US-201615222934-A
Country	US
Kind code	A1
Filing date	Jul 28, 2016
Priority date	Feb 7, 2014
Publication date	Nov 17, 2016
Grant date	—

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.

First claim

What is claimed is:

1 . A transmission method for transmitting a first broadcasting signal and a second broadcasting signal each generated using a multi-antenna encoding scheme,
wherein a first transmit station transmits the first broadcasting signal to a first service area, a second transmit station transmits the second broadcasting signal to a second service area, at least part of the second service area overlapping the first service area, the first broadcasting signal and the second broadcasting signal are transmitted from the first transmit station and the second transmit station at an identical time using an identical frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and the second service area is narrower than the first service area.

2 . The transmission method according to claim 1 , wherein
the first broadcasting signal includes a first pilot signal, the second broadcasting signal includes a second pilot signal, and density of the second pilot signal in a frequency direction is lower than density of the first pilot signal in the frequency direction.

3 . The transmission method according to claim 1 , wherein the second transmit station is densely arranged compared with the first transmit station.

4 . The transmission method according to claim 1 , wherein
first data and second data generated from identical program data, the first data and the second data differing from each other in a transmission rate, and multi-antenna encoding is performed on the first data and the second data to generate the first broadcasting signal and the second broadcasting signal.

5 . A transmission device comprising a generator that generates a first broadcasting signal and a second broadcasting signal using a multi-antenna encoding scheme,
wherein the first broadcasting signal is transmitted from a first transmit station to a first service area, the second broadcasting signal is transmitted from a second transmit station to a second service area, at least part of the second service area overlapping the first service area, the first broadcasting signal and the second broadcasting signal are transmitted from the first transmit station and the second transmit station at an identical time using an identical frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and the second service area is narrower than the first service area.

6 . A reception method for receiving a first broadcasting signal and a second broadcasting signal each generated using a multi-antenna encoding scheme,
wherein a first transmit station transmits the first broadcasting signal to a first service area, a second transmit station transmits the second broadcasting signal to a second service area, at least part of the second service area overlapping the first service area, the first broadcasting signal and the second broadcasting signal are transmitted from the first transmit station and the second transmit station at an identical time using an identical frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, the second service area is narrower than the first service area, the first broadcasting signal includes a first pilot signal, the second broadcasting signal includes a second pilot signal, density the second pilot signal in a frequency direction is lower than density of the first pilot signal in the frequency direction, and at least one of the first broadcasting signal and the second broadcasting signal is modulated using the first pilot signal and the second pilot signal.

7 . A reception device comprising:
an input section that receives a first signal received through an external antenna; an auxiliary antenna installed in a case part of the reception device; and a demodulator that, using the first signal and a second signal received through the auxiliary antenna, separates a first broadcasting signal and a second broadcasting signal to modulate at least one of the first broadcasting signal and the second broadcasting signal.

8 . A reception device that receives a first broadcasting signal and a second broadcasting signal, the first broadcasting signal and the second broadcasting signal being generated using a multi-antenna encoding scheme,
wherein a first transmit station transmits the first broadcasting signal to a first service area, a second transmit station transmits the second broadcasting signal to a second service area, at least part of the second service area overlapping the first service area, the first broadcasting signal and the second broadcasting signal are transmitted from the first transmit station and the second transmit station at an identical time using an identical frequency band, polarized wave transmitted from the first transmit station differs from polarized wave transmitted from the second transmit station, and the second service area is narrower than the first service area, the first broadcasting signal includes a first pilot signal, the second broadcasting signal includes a second pilot signal, and density of the second pilot signal in a frequency direction is lower than density of the first pilot signal in the frequency direction, the reception device comprising a demodulator that modulates at least one of the first broadcasting signal and the second broadcasting signal using the first pilot signal and the second pilot signal.

Assignees

• Panasonic Ip Corp America

Inventors

• Kimura Tomohiro
• Murakami Yutaka
• Ouchi Mikihiro

Classifications

• H04B7/0874

  using subgroups of receive antennas · CPC title

• H04B7/0413 Primary

  MIMO systems · CPC title

• H04B7/10

  Polarisation diversity; Directional diversity · CPC title

• H04N21/2365

  Multiplexing of several video streams · CPC title

• H04W76/40

  for selective distribution or broadcast · CPC title