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US 10,708,030 B2Granted
Method of generating reference signal in wireless communication system
AssigneeOptis Cellular Technology, LLC
InventorsSeung Hee Han, Minseok Noh, Daewon Lee
Life of this patent
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Abstract
A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling.
Claims10
A computer-implemented method for transmitting a reference signal in a wireless communication system, the method comprising:
- executing, by a processor of a user equipment, instructions stored on non-transitory media which when executed perform the acts of:
- generating a plurality of reference signal sequences by cyclically shifting a base sequence xu(n);
- mapping each of the plurality of reference signal sequences to a corresponding single carrier frequency division multiple access (SC-FDMA) symbol among a plurality of SC-FDMA symbols in a subframe to form the reference signal, the subframe including the plurality of SC-FDMA symbols in a time domain and one resource block in a frequency domain, the resource block including 12 subcarriers;
- and
- transmitting the reference signal on an uplink channel,
- wherein the base sequence xu(n) is expressed by
- xu(n)=ejp(n)π/4, and
- at least one of the sets of values provided in the below table is used as a set of values for the phase parameter p(n):
- Sequence
- index (u)
- p(0), . . . , p(23)
- 0
- −1 3 3 3 −3 1 3 −3 −1 −3 −1 1 −3 3 −1 3 1
- 1 −1 −3 3 −1 −1 −1
- 1
- −1 1 3 −3 3 −1 3−1 1 −1 −3 −1
- 3 −3 −1 −3 −3 −3 −3 −1 −1 3 1 −1
- 2
- −1 3 1 −1 −3 1 −3 3 1 1 −1 −3 −1 1 −3 −1
- 1 1 1 3 −3 −1 −1 −1
- 3
- − 1−3 3 3 −3 1 −1 −1 3 3 −3 −3 1 3 3 −1
- 3 −3 −1 −1 −1 −1 1 −1
- 4
- −1 −1 −3 −1 3 −3 − 3 −1 3 −3 3 1
- 1 −3 −3 −3 −3 1 −1 −3 1 −1 −1 −1
- 5
- −1 1 −3 −3 −1 −1 1 −1 −3 −3 −3 3 1 −3
- 1 3 1 −3 3 −3 −1 −3 −3 −1
- 6
- −1 1 1 3 −3 −1 1 −1 −1 −1 3 1 −1 1 −3 1 3 −3
- 3 1 −3 1 1 −1
- 7
- −1 1 1 −3 −3 −3 −3 −3 −3 −1 3 3 −1 −1 −3
- 1 −3 1 −3 1 1 −3 3 −1
- 8
- −1 −1 3 3 −1 3 1 −3 −3 1 −3 −1 3 −1 −1 −1 −3
- 1 1 −1 −3 −3 −3 −1
- 9
- −1 −3 3 −1 −1 −1 −1 1 1 −3 3 1 3 3 1 −1 1 −3 1 −3
- 1 1 −3 −1
- 10
- −1 −3 −1 −3 −1 −3 −3 1 1 3 1 3 −1 −1 3 1
- 1 −3 −3 −1 3 3 −1 −1
- 11
- −1 −3 3 −3 −3 −3 −1 −1 −3 −1 −3 3 1
- 3 −3 −1 3 −1 1 −1 3 −3 1 −1
- 12
- −1 −1 1 −3 1 3 −3 1 −1 −3 −1 3 1 3
- 1 −1 −3 −3 −1 −1 −3 −3 −3 −1
- 13
- −1 −3 −1 −1 3 1 3 1 −3 −3 −1 −3 −3 −3 −1
- 3 3 −1 −1 −3 1 3 −1 −1
- 14
- −1 1 −1 −1 3 −3 3 −3 1 1 −1 1 1 1 −1 3 3 −1 −1
- 1 −3 3 −1 −1
- 15
- −1 1 −3 −3 −3 1 1 −3 1 1 −1 −1 3 −1 −3
- 1 −1 −1 1 1 3 1 −3 −1
- 16
- −1 −1 −3 3 −1 −1 −1 3 1 −3 1 1 3 −3
- 1 −3 −1 −1 −1 3 −3 3 −3 −1
- 17
- −1 1 −3 −1 −3 1 3 −3 3 −3 −3 −3 1 −1
- 3 −1 −3 −1 −1 −3 −3 1 1 −1
- 18
- −1 3 1 −3 −3 −3 −3 1 −1 1 1 1 −3 −1 1 1
- 3 −1 −1 3 −1 1 −3 −1
- 19
- −1 1 −3 −1 −1 1 −3 −1 −3 −1 1 1 1 1 3
- 1 −1 −3 −3 3 −1 3 1 −1
- 20
- −1 1 3 −1 −1 1 −1 −3 −1 −1 1 1 1 −3 3
- 1 −1 −1 −3 3 −3 −1 3 −1
- 21
- −1 −3 1 1 3 −3 1 1 −3 −1 −1 1 3 1 3 1 −1 3 1
- 1 −3 −1 −3 −1
- 22
- −1 −1 3 3 3 −3 −3 3 3 −1 3 −1 −1 −1 −1
- 3 −3 1 −1 3 −1 −1 3 −1
- 23
- −1 3 −1 3 −1 1 1 3 1 3 −3 1 3 −3 −3 1 1 −3 3 3 3
- 1 −1 −1
- 24
- −1 −3 −1 −1 1 −3 −1 −1 1 −1 −3 1
- 1 −3 1 −3 −3 3 1 1 −1 3 −1 −1
- 25
- −1 −1 1 −1 1 1 −1 −1 −3 1 −3 −1 3 1 −3
- 3 −1 1 3 −3 3 1 −1 −1
- 26
- −1 1 −3 −3 −1 1 −1 1 3 1 3 3 1 1 −1 3 1 −1
- 3 −1 3 3 −1 −1
- 27
- −1 −1 3 −3 1 −3 1 3 −3 3 1 3 3 −1 −1 3 3 3
- 1 −3 −1 −1 1 −1
- 28
- −1 3 −1 −1 3 −3 −1 −3 −3 3 −3 3 −1
- 1 −1 −3 3 3 −3 −1 −1 −1 1 −1
- 29
- −1 1 1 1 3 3 −1 −1 −1 −1 3 −3 −1 3
- 1 −3 −1 1 −1 −1 −3 1 −1 −1.
98 more elements
A mobile communications terminal configured to transmit a reference signal in a wireless communication system, comprising:
- a processor configured to execute instructions stored on non-transitory media which when executed perform the acts of:
- generating a plurality of reference signal sequences by cyclically shifting a base sequence xu(n);
- mapping each of the plurality of reference signal sequences to a corresponding single carrier frequency division multiple access (SC-FDMA) symbol among a plurality of SC-FDMA symbols in a subframe to form the reference signal, the subframe including the plurality of SC-FDMA symbols in a time domain and a resource blocks in a frequency domain, the resource block including 12 subcarriers;
- and
- a transmitter configured to transmit the reference signal on an uplink channel, wherein the base sequence xu(n) is expressed by
- xu(n)=ejp(n)π/4, and
- at least one of the sets of values provided in the below table is used as a set of values for the phase parameter p(n):
- Sequence
- index (u)
- p(0), . . . , p(23)
- 0
- −1 3 3 3 −3 1 3 −3 −1 −3 −1 1 −3 3 −1 3 1
- 1 −1 −3 3 −1 −1 −1
- 1
- −1 1 3 −3 3 −1 3 −1 1 −1 −3 −1
- 3 −3 −1 −3 −3 −3 −3 −1 −1 3 1 −1
- 2
- −1 3 1 −1 −3 1 −3 3 1 1 −1 −3 −1 1 −3 −1
- 1 1 1 3 −3 −1 −1 −1
- 3
- −1 −3 3 3 −3 1 −1 −1 3 3 −3 −3 1 3 3 −1
- 3 −3 −1 −1 −1 −1 1 −1
- 4
- −1 −1 −3 −1 3 −3 −3 −1 3 −3 3 1
- 1 −3 −3 −3 −3 1 −1 −3 1 −1 −1 −1
- 5
- −1 1 −3 −3 −1 −1 1 −1 −3 −3 −3 3
- 1 −3 1 3 1 −3 3 −3 −1 −3 −3 −1
- 6
- −1 1 1 3 −3 −1 1 −1 −1 −1 3 1 −1 1 −3 1
- 3 −3 3 1 −3 1 1 −1
- 7
- −1 1 1 −3 −3 −3 −3 −3 −3 −1 3
- 3 −1 −1 −3 1 −3 1 −3 1 1 −3 3 −1
- 8
- −1 −1 3 3 −1 3 1 −3 −3 1 −3 −1
- 3 −1 −1 −1 −3 1 1 −1 −3 −3 −3 −1
- 9
- −1 −3 3 −1 −1 −1 −1 1 1 −3 3 1 3 3 1 −1
- 1 −3 1 −3 1 1 −3 −1
- 10
- −1 −3 −1 −3 −1 −3 −3 1 1 3 1 3 −1 −1
- 3 1 1 −3 −3 −1 3 3 −1 −1
- 11
- −1 −3 3 −3 −3 −3 −1 −1 −3 −1 −3
- 3 1 3 −3 −1 3 −1 1 −1 3 −3 1 −1
- 12
- −1 −1 1 −3 1 3 −3 1 −1 −3 −1 3 1 3
- 1 −1 −3 −3 −1 −1 −3 −3 −3 −1
- 13
- −1 −3 −1 −1 3 1 3 1 −3 −3 −1 −3 −3 −3 −1
- 3 3 −1 −1 −3 1 3 −1 −1
- 14
- −1 1 −1 −1 3 −3 3 −3 1 1 −1 1 1 1 −1 3
- 3 −1 −1 1 −3 3 −1 −1
- 15
- −1 1 −3 −3 −3 1 1 −3 1 1 −1 −1
- 3 −1 −3 1 −1 −1 1 1 3 1 −3 −1
- 16
- −1 −1 −3 3 −1 −1 −1 3 1 −3 1 1 3 −3
- 1 −3 −1 −1 −1 3 −3 3 −3 −1
- 17
- −1 1 −3 −1 −3 1 3 −3 3 −3 −3 −3
- 1 −1 3 −1 −3 −1 −1 −3 −3 1 1 −1
- 18
- −1 3 1 −3 −3 −3 −3 1 −1 1 1 1 −3 −1
- 1 1 3 −1 −1 3 −1 1 −3 −1
- 19
- −1 1 −3 −1 −1 1 −3 −1 −3 −1 1 1 1 1
- 3 1 −1 −3 −3 3 −1 3 1 −1
- 20
- −1 1 3 −1 −1 1 −1 −3 −1 −1 1 1 1 −3
- 3 1 −1 −1 −3 3 −3 −1 3 −1
- 21
- −1 −3 1 1 3 −3 1 1 −3 −1 −1 1 3 1 3 1 −1 3
- 1 1 −3 −1 −3 −1
- 22
- −1 −1 3 3 3 −3 −3 3 3 −1 3 −1 −1 −1 −1
- 3 −3 1 −1 3 −1 −1 3 −1
- 23
- −1 3 −1 3 −1 1 1 3 1 3 −3 1 3 −3 −3 1 1 −3 3 3 3
- 1 −1 −1
- 24
- −1 −3 −1 −1 1 −3 −1 −1 1 −1 −3 1
- 1 −3 1 −3 −3 3 1 1 −1 3 −1 −1
- 25
- −1 −1 1 −1 1 1 −1 −1 −3 1 −3 −1 3
- 1 −3 3 −1 1 3 −3 3 1 −1 −1
- 26
- −1 1 −3 −3 −1 1 −1 1 3 1 3 3 1 1 −1 3 1 −1
- 3 −1 3 3 −1 −1
- 27
- −1 −1 3 −3 1 −3 1 3 −3 3 1 3 3 −1 −1 3 3 3
- 1 −3 −1 −1 1 −1
- 28
- −1 3 −1 −1 3 −3 −1 −3 −3 3 −3
- 3 −1 1 −1 −3 3 3 −3 −1 −1 −1 1 −1
- 29
- −1 1 1 1 3 3 −1 −1 −1 −1 3 −3 −1 3
- 1 −3 −1 1 −1 −1 −3 1 −1 −1.
97 more elements
Dependencies are inferred from the claim text.