IP Library Granted Patent US 8,644,345
Granted Patent B2
US 8,644,345 · App. 13/212,389 · Granted Feb 4, 2014

Multi-carrier signal transmitter and multi-carrier signal receiver

Inventor: Hideki Iwami (Saitama, JP)
Assignee: Sony Corporation
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Quick Facts
Patent No.
US 8,644,345
App. No.
13/212,389
Granted
Feb 4, 2014
Kind
B2
Abstract

A multi-carrier signal transmission apparatus transmits a transmission stream including at least preamble information necessary for synchronizing a transmission signal and data information as a multi-carrier signal. A modulator generates a transmission symbol stream by modulating an arrangement of the preamble information and the data information. A symbol expanding portion expands the transmission symbol stream on a frequency axis by generating a complex conjugate value of at least one part of the preamble information symmetrically on the frequency axis.

Claims (15)

1. A multi-carrier signal transmission apparatus for transmitting a transmission stream as a multi-carrier signal, the apparatus comprising:

a modulator that generates a transmission symbol stream by modulating an arrangement of information necessary for synchronizing a transmission signal and data information; and

an expanding portion that expands the information necessary for synchronizing the transmission signal symmetrically on a frequency axis.

2. The multi-carrier signal transmission apparatus according to claim 1 , wherein the expanding portion expands the transmission symbol stream on the frequency axis by generating a complex conjugate value of at least one part of the information necessary for synchronizing the transmission signal symmetrically on the frequency axis.

3. The multi-carrier signal transmission apparatus according to claim 2 , wherein the transmission symbol stream is expanded symmetrically about a reference position on the frequency axis.

4. A multi-carrier signal transmission apparatus for transmitting a transmission stream as a multi-carrier signal, the apparatus comprising:

modulation means for generating a transmission symbol stream by modulating an arrangement of information necessary for synchronizing a transmission signal and data; and

expanding means for expanding the information necessary for synchronizing the transmission signal symmetrically on a frequency axis.

5. The multi-carrier signal transmission apparatus according to claim 4 , wherein the expanding means expands the transmission symbol stream on the frequency axis by generating a complex conjugate value of at least one part of the information necessary for synchronizing the transmission signal symmetrically on the frequency axis.

6. The multi-carrier signal transmission apparatus according to claim 5 , wherein the transmission symbol stream is expanded symmetrically about a reference position on the frequency axis.

7. A multi-carrier signal transmission method for transmitting a transmission stream as a multi-carrier signal, the method comprising:

generating a transmission symbol stream by modulating an arrangement of information necessary for synchronizing a transmission signal and data; and

expanding the information necessary for synchronizing the transmission signal symmetrically on a frequency axis.

8. The multi-carrier signal transmission method according to claim 7 , wherein the expanding step expands the transmission symbol stream on the frequency axis by generating a complex conjugate value of at least one part of the information necessary for synchronizing the transmission signal symmetrically on the frequency axis.

9. The multi-carrier signal transmission method according to claim 8 , wherein the transmission symbol stream is expanded symmetrically about a reference position on the frequency axis.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 4, 2021
From: WI-FI ONE, LLC
To: REDWOOD TECHNOLOGIES, LLC
Reel/Frame 058026/0232 →
RELEASE OF SECURITY INTEREST Recorded Nov 3, 2021
From: CORTLAND CAPITAL MARKET SERVICES LLC
To: WI-FI ONE, LLC
Reel/Frame 058014/0725 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded May 23, 2018
From: WI-FI ONE, LLC
To: CORTLAND CAPITAL MARKET SERVICES LLC, AS COLLATERAL AGENT
Reel/Frame 046222/0786 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 6, 2018
From: SONY CORPORATION
To: WI-FI ONE, LLC
Reel/Frame 045853/0047 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 19, 2011
From: IWAMI, HIDEKI
To: SONY CORPORATION
Reel/Frame 026788/0446 →
Priority Claims (1)
JP P11-227815 · Aug 11, 1999 · national
Continuity (5)
Continuation 12412564 · Mar 27, 2009
Continuation 11811858 · Jun 11, 2007
Continuation 11115996 · Apr 27, 2005
Continuation 09807187
Related Publication 20110299556A1 · Dec 8, 2011