Method of transmitting synchronization signal in wireless communication system
AssigneeLG Electronics Inc.
InventorsSeung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
Life of this patent
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Abstract
A method of transmitting a synchronization signal includes generating a sequence P(k) for a synchronization signal from a Zadoff-Chu (ZC) sequence having the odd numbered length N, the sequence P(k) having the even numbered length N−I, mapping the sequence P(k) to subcarriers so that the sequence P(k) is halved with respect to a DC subcarrier, and transmitting the a synchronization signal in the subcarriers. Time/frequency ambiguity caused by a synchronization error can be avoided, and sequence detection errors can be decreased.
Claims10
A method of transmitting a synchronization signal in a wireless communication system, the method comprising:
- mapping each element of a synchronization signal sequence P(k) to a corresponding subcarrier from a sequence of subcarriers s(n) as shown by:
- s(n)=P(k)
- where n=k−31 and k=0, 1, . . . , 30, 32, . . . , 62;
- and
- transmitting the mapped synchronization signal sequence P(k), wherein the sequence P(k) is defined by a Zadoff-Chu (ZC) sequence having a length N=63 according to
- P
-
- (
- k
- )
- =
- exp
-
- {
- -
- j
-
-
- π
-
-
- Mk
-
- (
- k
- +
- 1
- )
- 63
- }
- where M is a root index which is relatively prime to N and k=0, 1, . . . , 30, 32, . . . , 62, whereby the length of the sequence P(k) is N−1.
A method of acquiring synchronization with a cell in a wireless communication system, the method comprising:
- receiving a primary synchronization signal;
- and
- receiving a secondary synchronization signal,
- wherein a sequence P(k) for the primary synchronization signal is generated from a ZC sequence having the length N=63 according to
- P
-
- (
- k
- )
- =
- exp
-
- {
- -
- j
-
-
- π
-
-
- Mk
-
- (
- k
- +
- 1
- )
- 63
- }
- where M is a root index which is relatively prime to N and k=0, 1, . . . , 30, 32, . . . , 62, and
- each element of th the sequence P(k) is mapped to a corresponding subcarrier from a sequence of subcarriers s(n) as shown by:
- s(n)=P(k)
- where n=k−31 and k=0, 1, . . . , 30, 32, . . . , 62.
A user equipment for transmitting a synchronization signal in a wireless communication system, the user equipment comprising a processor configured to:
- mapping each element of a synchronization signal sequence P(k) to a corresponding subcarrier from a sequence of subcarriers s(n) as shown by:
- s(n)=P(k)
- where n=k−31 and k=0, 1, . . . , 30, 32, . . . , 62;
- and
- transmitting the mapped synchronization signal sequence P(k), wherein the sequence P(k) is defined by a Zadoff-Chu (ZC) sequence having a length N=63 according to
- P
-
- (
- k
- )
- =
- exp
-
- {
- -
- j
-
-
- π
-
-
- Mk
-
- (
- k
- +
- 1
- )
- 63
- }
- where M is a root index which is relatively prime to N and k=0, 1, . . . , 30, 32, . . . , 62, whereby the length of the sequence P(k) is N−1.
Dependencies are inferred from the claim text.