US 8,787,421 B2Granted

Transmitting spread signal in communication system

AssigneeLG Electronics Inc.

InventorsJung Hoon Lee, Ki Jun Kim, Dong Wook Roh, Daewon Lee, Joon Kui Ahn

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Abstract

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.

Claims20

Dependent claims

A method for communicating Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising:

transmitting, by a base station, a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol, wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1;
receiving, by a terminal, the first signal including the first spread ACK/NACK information and the second spread ACK/NACK information on the first set of four available neighboring subcarriers;
transmitting, by the base station, a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol, wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2;
and
receiving, by the terminal, the second signal including the third spread ACK/NACK information and the fourth spread ACK/NACK information on the second set of four available neighboring subcarriers,
TABLE 1
First set of four available
neighboring subcarriers
in an OFDM symbol
antenna A
a1
a2
b1
b2
antenna B
−a2*
a1*
−b2*
b1*
antenna C
0
0
0
0
antenna D
0
0
0
0
TABLE 2
Second set of four available
neighboring subcarriers
in an OFDM symbol
antenna A
0
0
0
0
antenna B
0
0
0
0
antenna C
c1
c2
d1
d2
antenna D
−c2*
c1*
−d2*
d1*
wherein a1 to a2 are elements of the first spread ACK/NACK information, b1 to b2 are elements of the second spread ACK/NACK information, c1 to c2 are elements of the third spread ACK/NACK information, d1 to d2 are elements of the fourth ACK/NACK information, and the symbol * denotes a conjugate operation,
wherein the first spread ACK/NACK information and the third spread ACK/NACK information carry first ACK/NACK information,
wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information carry second ACK/NACK information, and
wherein the first set of four available neighboring subcarriers is separated from the second set of four available neighboring subcarriers by a plurality of subcarriers in a frequency domain.

54 more elements

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system, the method comprising:

receiving, by a terminal, a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol;
and
receiving, by the terminal, a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol,
wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1,
wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2:
TABLE 1
First set of four available
neighboring subcarriers
in an OFDM symbol
antenna A
a1
a2
b1
b2
antenna B
−a2*
a1*
−b2*
b1*
antenna C
0
0
0
0
antenna D
0
0
0
0
TABLE 2
Second set of four
available neighboring
subcarriers in an
OFDM symbol
antenna A
0
0
0
0
antenna B
0
0
0
0
antenna C
c1
c2
d1
d2
antenna D
−c2*
c1*
−d2*
d1*
wherein a1 to a2 are elements of the first spread ACK/NACK information, b1 to b2 are elements of the second spread ACK/NACK information, c1 to c2 are elements of the third spread ACK/NACK information, d1 to d2 are elements of the fourth ACK/NACK information, and the symbol * denotes a conjugate operation,
wherein the first spread ACK/NACK information and the third spread ACK/NACK information carry first ACK/NACK information,
wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information carry second ACK/NACK information, and
wherein the first set of four available neighboring subcarriers is separated from the second set of four available neighboring subcarriers by a plurality of subcarriers in a frequency domain.

55 more elements

A mobile communication system including a base station and a terminal, wherein:

the base station is configured to transmit a first signal including first spread Acknowledgement/Negative acknowledgement (ACK/NACK) information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol, wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1;
the terminal is configured to receive the first signal including the first spread ACK/NACK information and the second spread ACK/NACK information on the first set of four available neighboring subcarriers;
the base station is further configured to transmit a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol, wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2;
and
the terminal is further configured to receive the second signal including the third spread ACK/NACK information and the fourth spread ACK/NACK information on the second set of four available neighboring subcarriers,
TABLE 1
First set of four available
neighboring subcarriers
in an OFDM symbol
antenna A
a1
a2
b1
b2
antenna B
−a2*
a1*
−b2*
b1*
antenna C
0
0
0
0
antenna D
0
0
0
0
TABLE 2
Second set of four
available neighboring
subcarriers in an
OFDM symbol
antenna A
0
0
0
0
antenna B
0
0
0
0
antenna C
c1
c2
d1
d2
antenna D
−c2*
c1*
−d2*
d1*
wherein a1 to a2 are elements of the first spread ACK/NACK information, b1 to b2 are elements of the second spread ACK/NACK information, c1 to c2 are elements of the third spread ACK/NACK information, d1 to d2 are elements of the fourth ACK/NACK information, and the symbol * denotes a conjugate operation,
wherein the first spread ACK/NACK information and the third spread ACK/NACK information carry first ACK/NACK information,
wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information carry second ACK/NACK information, and
wherein the first set of four available neighboring subcarriers is separated from the second set of four available neighboring subcarriers by a plurality of subcarriers in a frequency domain.

55 more elements

A terminal for use in a mobile communication system, wherein the terminal is configured to:

receive a first signal including first spread ACK/NACK information and second spread ACK/NACK information on a first set of four available neighboring subcarriers in an orthogonal frequency division multiplexing (OFDM) symbol;
and
receive a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information on a second set of four available neighboring subcarriers in an OFDM symbol,
wherein the first spread ACK/NACK information and the second spread ACK/NACK information are coded on the first set of four available neighboring subcarriers as shown in Table 1,
wherein the third spread ACK/NACK information and the fourth spread ACK/NACK information are coded on the second set of four available neighboring subcarriers as shown in Table 2:
TABLE 1
First set of four available
neighboring subcarriers
in an OFDM symbol
antenna A
a1
a2
b1
b2
antenna B
−a2*
a1*
−b2*
b1*
antenna C
0
0
0
0
antenna D
0
0
0
0
TABLE 2
Second set of four
available neighboring
subcarriers in an
OFDM symbol
antenna A
0
0
0
0
antenna B
0
0
0
0
antenna C
c1
c2
d1
d2
antenna D
−c2*
c1*
−d2*
d1*
wherein a1 to a2 are elements of the first spread ACK/NACK information, b1 to b2 are elements of the second spread ACK/NACK information, c1 to c2 are elements of the third spread ACK/NACK information, d1 to d2 are elements of the fourth ACK/NACK information, and the symbol * denotes a conjugate operation,
wherein the first spread ACK/NACK information and the third spread ACK/NACK information carry first ACK/NACK information,
wherein the second spread ACK/NACK information and the fourth spread ACK/NACK information carry second ACK/NACK information, and
wherein the first set of four available neighboring subcarriers is separated from the second set of four available neighboring subcarriers by a plurality of subcarriers in a frequency domain.

55 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/030,747Filed 18 Sep 2013 · continuation
Priority: KR 10-2008-000793525 Jan 2008
Published: US 2014/0023121 A123 Jan 2014
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK
H04B 1/707
Spread spectrum techniques: using direct sequence modulation
H04B 7/0413
Using two or more spaced independent antennas: mIMO systems
H04B 7/0678
Using simultaneous transmission: using different spreading codes between antennas

Family

Application60/943,783Us provisional application · filed 13 Jun 2007
Application60/955,019Us provisional application · filed 9 Aug 2007
Application60/976,487Us provisional application · filed 1 Oct 2007
Application60/982,435Us provisional application · filed 25 Oct 2007
Application60/983,234Us provisional application · filed 29 Oct 2007
Application12/139,261Parent of this continuation · filed 13 Jun 2008
Application13/166,750Parent of this continuation · filed 22 Jun 2011
US 8,009,720 B2Parent of this continuation · filed 30 Aug 2011
Application13/757,700Parent of this continuation · filed 1 Feb 2013
US 8,369,378 B2Parent of this continuation · filed 5 Feb 2013
US 2014/0023121 A1Pre-grant publication · published 23 Jan 2014
US 8,582,626 B2Parent of this continuation
US 2008/0310483 A1Published application
US 2011/0249705 A1Published application
US 2013/0148698 A1Published application
US 8,787,421 B2This patent

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

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