Signal generation method, transmission device, reception method, and reception device

Patent metadata

Field	Value
Publication number	US-9374141-B2
Application number	US-201314442899-A
Country	US
Kind code	B2
Filing date	Dec 6, 2013
Priority date	Dec 7, 2012
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

A signal generation method is used in a transmission device that transmits a plurality of transmission signals from a plurality of antennas at the same frequency and at the same time, in the case where larger power change is performed on a first transmission signal than on a second transmission signal during generation process of the first transmission signal and the second transmission signal, the first transmission signal and the second transmission signal are mapped before the power change such that a minimum Euclidian distance between possible signal points for the first signal is longer than a minimum Euclidian distance between possible signal points for the second signal.

First claim

The invention claimed is:

1. A signal generation method for use in a transmission device, the signal generation method comprising:
generating a first modulated signal s 1 (i) from first transmission data of g bits, and generating a second modulated signal s 2 (i) from second transmission data of h bits;
generating a first signal z 1 (i) and a second signal z 2 (i) that satisfy formula R2 from the first modulated signal s 1 (i) and the second modulated signal s 2 (i), the generating of the first modulated signal s 1 (i), the second modulated signal s 2 (i), the first signal z 1 (i) and the second signal z 2 (i) being performed by the transmitting device; and
transmitting, using the transmission device, a plurality of transmission signals including at least the first signal z 1 (i) and the second signal z 2 (i) from a plurality of antennas at the same frequency and at the same time,

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Assignees

• Panasonic Ip Corp America
• Sun Patent Trust

Inventors

• Murakami Yutaka
• Kimura Tomohiro
• Ouchi Mikihiro

Classifications

• H04L23/00

  Apparatus or local circuits for systems other than those covered by groups H04L15/00 - H04L21/00 · CPC title

• H04W72/542

  using measured or perceived quality · CPC title

• H04W72/30

  Resource management for broadcast services · CPC title

• H04B7/0413 Primary

  MIMO systems · CPC title

• H04L27/12

  Modulator circuits; Transmitter circuits · CPC title