USRE41432E1 - Synchronization symbol structure using OFDM based transmission method - Google Patents
Synchronization symbol structure using OFDM based transmission method Download PDFInfo
- Publication number
- USRE41432E1 USRE41432E1 US12/259,063 US25906308A USRE41432E US RE41432 E1 USRE41432 E1 US RE41432E1 US 25906308 A US25906308 A US 25906308A US RE41432 E USRE41432 E US RE41432E
- Authority
- US
- United States
- Prior art keywords
- symbols
- predefined
- symbol sequence
- subcarriers
- synchronization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
- H04L27/262—Reduction thereof by selection of pilot symbols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
-
- S=
2 (±1±j)
- S=
-
- S−24,24=√2*{1+j,0,0,0,1+j,0,0,0,−1−j,0,0,0,−1−j,0,0,0,1−j,0,0,0,−1−j,0,0,0,0 0,0,0,1+j,0,0,0,1+j,0,0,0,−1−j,0,0,0,1+j,0,0,0,−1+j,0,0,0,1+j}
n=2m,
Ci-1=±C1-i,
-
- n being the number of symbols of the predefined symbol sequence,
- m being an integer larger than one,
- C being the symbol value, and
- i being an integer running from 1 to m.
-
- A A A −A −A −A −A A −A −A A −A,
wherein A is a complex value.
- A A A −A −A −A −A A −A −A A −A,
-
- A −A A A −A A A A A −A −A −A,
wherein A is a complex value.
- A −A A A −A A A A A −A −A −A,
-
- A B −A B −A −B B A −B A −B −A,
wherein A, B are complex values.
- A B −A B −A −B B A −B A −B −A,
-
- A −B −A −B −A B −B A B A B −A,
wherein A, B are complex values.
- A −B −A −B −A B −B A B A B −A,
C00 | C01 | C02 | C03 | C04 | C05 | C06 | C07 | C08 | C09 | C10 | C11 | ||
Seq0 | A | A | A | −A | −A | −A | −A | A | −A | −A | A | −A |
Seq1 | A | −A | A | A | −A | A | A | A | A | −A | −A | −A |
Seq2 | A | B | −A | B | −A | −B | B | A | −B | A | −B | −A |
Seq3 | A | −B | −A | −B | −A | B | −B | A | B | A | B | −A |
with
n=2m,
Ci-1=±Cn-i
-
- wherein n is a number of symbols of the predefined symbol sequence,
- m is an integer larger than 1,
- c is the symbol value, and
- i is an integer value running from 1 to m.
(this corresponds to φA=0.125)
Symbol | |
A | | |
−A | | |
B | | |
−B | | |
Table 1: Complex symbol mapping
-
- S=2*{C00, 0, 0, 0, C01, 0, 0, 0, C02, 0, 0, 0, C03, 0, 0, 0, C04, 0, 0, 0, C05, 0, 0, 0, 0, 0, 0, 0, C06, 0, 0, 0, C07, 0, 0, 0, C08, 0, 0, 0, C09, 0, 0, 0, C10, 0, 0, 0, C11}
C00 | C01 | C02 | C03 | C04 | C05 | C06 | C07 | C08 | C09 | C10 | C11 | ||
Seq-Alt0 | A | A | A | A | −A | −A | A | −A | −A | A | −A | A |
Seq-Alt1 | A | −A | A | −A | −A | A | −A | −A | A | A | A | A |
Seq-Alt2 | A | B | −A | −B | −A | −B | −B | −A | −B | −A | B | A |
Seq-Alt3 | A | −B | −A | B | −A | B | B | −A | B | −A | −B | A |
with A=exp (i*2*π*φA) and
and 0.0≦φA<1.0.
-
- An OFDM based SYNCH symbol with a reduced Peak-to-Average-Power-Ratio (PARP) is proposed,
- Improved synchronization performance (compared to the state of the art proposal),
- Reduced AGC (automatic gain control) pull-in time due to reduced dynamic range of the SYNCH burst,
- Improved AGC settlement (AGC has to adjust to a incoming signal level that later on now overflow/underflow in the AD happens. The reduced dynamic range of the SYNCH burst help to find this reference level more accurate),
- Reduced synchronization detection complexity on the receiver (reduced resolution necessary due to reduced envelope fluctuation).
Claims (18)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/259,063 USRE41432E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99100263 | 1999-01-08 | ||
EP99100263 | 1999-01-08 | ||
EP99103379A EP1018827B1 (en) | 1999-01-08 | 1999-02-22 | Synchronisation structure for OFDM system |
EP99103379 | 1999-02-22 | ||
US09/479,281 US6654339B1 (en) | 1999-01-08 | 2000-01-06 | Synchronization symbol structure using OFDM based transmission method |
US12/259,063 USRE41432E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/479,281 Reissue US6654339B1 (en) | 1999-01-08 | 2000-01-06 | Synchronization symbol structure using OFDM based transmission method |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE41432E1 true USRE41432E1 (en) | 2010-07-13 |
Family
ID=26152852
Family Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/479,281 Ceased US6654339B1 (en) | 1999-01-08 | 2000-01-06 | Synchronization symbol structure using OFDM based transmission method |
US11/286,440 Expired - Lifetime USRE40568E1 (en) | 1999-01-08 | 2005-11-23 | Synchronization symbol structure using OFDM based transmission method |
US12/259,045 Expired - Lifetime USRE41606E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/258,984 Expired - Lifetime USRE41641E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/259,063 Expired - Lifetime USRE41432E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/259,018 Expired - Lifetime USRE41431E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/258,939 Expired - Lifetime USRE41486E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/258,799 Expired - Lifetime USRE41470E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
Family Applications Before (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/479,281 Ceased US6654339B1 (en) | 1999-01-08 | 2000-01-06 | Synchronization symbol structure using OFDM based transmission method |
US11/286,440 Expired - Lifetime USRE40568E1 (en) | 1999-01-08 | 2005-11-23 | Synchronization symbol structure using OFDM based transmission method |
US12/259,045 Expired - Lifetime USRE41606E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/258,984 Expired - Lifetime USRE41641E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
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US12/259,018 Expired - Lifetime USRE41431E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/258,939 Expired - Lifetime USRE41486E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
US12/258,799 Expired - Lifetime USRE41470E1 (en) | 1999-01-08 | 2008-10-27 | Synchronization symbol structure using OFDM based transmission method |
Country Status (5)
Country | Link |
---|---|
US (8) | US6654339B1 (en) |
EP (5) | EP1722527B1 (en) |
JP (1) | JP4050437B2 (en) |
KR (1) | KR100712865B1 (en) |
CA (1) | CA2291847C (en) |
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KR100712865B1 (en) | 2007-05-03 |
USRE41606E1 (en) | 2010-08-31 |
JP4050437B2 (en) | 2008-02-20 |
USRE41431E1 (en) | 2010-07-13 |
CA2291847C (en) | 2005-09-13 |
USRE41486E1 (en) | 2010-08-10 |
EP1530336A1 (en) | 2005-05-11 |
EP1439677B1 (en) | 2007-06-13 |
EP1439677B9 (en) | 2007-11-07 |
CA2291847A1 (en) | 2000-07-08 |
USRE41470E1 (en) | 2010-08-03 |
EP1018827A1 (en) | 2000-07-12 |
USRE41641E1 (en) | 2010-09-07 |
US6654339B1 (en) | 2003-11-25 |
EP1439677A1 (en) | 2004-07-21 |
EP1705852A2 (en) | 2006-09-27 |
EP1705852A3 (en) | 2006-11-15 |
KR20000053406A (en) | 2000-08-25 |
JP2000209183A (en) | 2000-07-28 |
EP1530336B1 (en) | 2009-06-10 |
EP1722527A1 (en) | 2006-11-15 |
EP1018827B1 (en) | 2004-05-06 |
EP1722527B1 (en) | 2008-08-06 |
USRE40568E1 (en) | 2008-11-11 |
EP1705852B1 (en) | 2010-02-10 |
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