US 11,689,259 B2Granted

Signal generating method and signal generating apparatus

AssigneeSun Patent Trust

InventorsYutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi

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Abstract

A transmission apparatus that (i) generates a Quadrature Phase Shift Keying (QPSK) modulation signal s1(t) by applying a QPSK modulation scheme to a first data sequence, (ii) generates a 16-Quadrature Amplitude Modulation (QAM) modulation signal s2(t) by applying a 16-QAM modulation scheme to a second data sequence, (iii) generates a transmission signal z1(t) and a second transmission signal z2(t) by applying a phase hopping process, a precoding process, and a power adjust process to the QPSK modulation signal s1(t) and the 16-QAM modulation signal s2(t), wherein an average transmission power of the 16-QAM modulation signal s2(t) being the same as an average transmission power of the QPSK modulation signal s1(t), and (iv) transmits the transmission signal z1(t) from a first antenna at a first time and a first frequency and the second transmission signal z2(t) from a second antenna at the first time and the first frequency.

Claims1

Dependent claims

A transmission method comprising:

generating a Quadrature Phase Shift Keying (QPSK) modulation signal s1(t) by applying a QPSK modulation scheme to a first data sequence;
generating a 16-Quadrature Amplitude Modulation (QAM) modulation signal s2(t) by applying a 16-QAM modulation scheme to a second data sequence;
generating a first transmission signal z1(t) and a second transmission signal z2(t) by applying a phase hopping process, a precoding process, and a power adjust process indicated in Equation 1 to the QPSK modulation signal s1(t) and the 16-QAM modulation signal s2(t);
and
transmitting the first transmission signal z1(t) and the second transmission signal z2(t) according to a Multiple-Input Multiple-Output scheme such that two bits of the QPSK modulation signal s1(t) and four bits of the 16-QAM modulation signal s2(t) are transmitted in per slot, wherein
(
z
⁢
⁢
1
⁢
(
t
)
z
⁢
2
⁢
(
t
)
)
=
(
1
0
0
y
⁡
(
t
)
)
⁢
F
⁡
(
ve
j
⁢
⁢
0
0
0
ue
j
⁢
⁢
0
)
⁢
(
s
⁢
⁢
1
⁢
(
t
)
s
⁢
2
⁢
(
t
)
)
(
Equation
⁢
⁢
1
)
where y(t) indicates an amount of change in phase, F indicates a matrix for the precoding process, v is a positive real number and a coefficient for power changing the QPSK modulation signal s1(t), u is a positive real number larger than v and a coefficient for power changing the 16-QAM modulation signal s2(t), and t indicates a slot.

72 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/721,540Filed 15 Apr 2022 · continuation
Priority: JP 2011 -1965118 Sep 2011
Published: US 2022/0255599 A111 Aug 2022
Granted: 27 Jun 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04B 1/005
Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised…
H04B 7/0417
MIMO systems: feedback systems
H04B 7/0426
MIMO systems: power distribution
H04L 25/0222
Channel estimation: estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency

Family

PCT/JP2012/005666Parent of this continuation · filed 6 Sep 2012
Application14/703,009Parent of this continuation · filed 4 May 2015
US 9,054,757 B2Parent of this continuation · filed 9 Jun 2015
Application15/202,766Parent of this continuation · filed 6 Jul 2016
US 9,425,874 B2Parent of this continuation · filed 23 Aug 2016
Application16/028,642Parent of this continuation · filed 6 Jul 2018
US 10,050,687 B2Parent of this continuation · filed 14 Aug 2018
Application16/392,910Parent of this continuation · filed 24 Apr 2019
US 10,320,458 B2Parent of this continuation · filed 11 Jun 2019
Application16/718,357Parent of this continuation · filed 18 Dec 2019
US 10,554,271 B2Parent of this continuation · filed 4 Feb 2020
Application16/909,059Parent of this continuation · filed 23 Jun 2020
US 10,735,065 B2Parent of this continuation · filed 4 Aug 2020
Application17/227,561Parent of this continuation · filed 12 Apr 2021
US 11,018,736 B2Parent of this continuation · filed 25 May 2021
US 2022/0255599 A1Pre-grant publication · published 11 Aug 2022
US 11,349,536 B2Parent of this continuation
Application14/241,130Parent of this continuation
US 2014/0219389 A1Published application
US 2015/0236768 A1Published application
US 2016/0315679 A1Published application
US 2018/0316399 A1Published application
US 2019/0253114 A1Published application
US 2020/0127714 A1Published application
US 2020/0322011 A1Published application
US 2021/0234582 A1Published application
US 11,689,259 B2This patent

From the US filing history. Foreign family members aren’t listed.