Method and device for detecting uplink synchronization signal in each step in wireless access system supporting high frequency band

• US 9,680,682 B2
• Filed: 08/29/2014
• Issued: 06/13/2017
• Est. Priority Date: 08/29/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Kilbom, Kim, Kitae, Chung, Jaehoon, Kim, Jinmin
• Primary Examiner(s): VARNDELL, ROSS E
• Application Number:
  US14/906,960
• Publication Number:
  US 20160173315A1
• Time in Patent Office: 1,019 Days
• CPC Class Codes: H04L 27/2655 Synchronisation arrangements
• CPC Class Codes: H04L 27/2663 Coarse synchronisation, e.g. by correlation
• CPC Class Codes: H04L 27/2671 Time domain
• CPC Class Codes: H04L 27/2675 Pilot or known symbols
• CPC Class Codes: H04L 27/2684 Complexity
• CPC Class Codes: H04L 27/2688 Resistance to perturbation, e.g. noise, interference or fading
• CPC Class Codes: H04L 27/2695 with channel estimation, e.g. determination of delay spread, derivative or peak tracking channel estimation H04L25/0202
• CPC Class Codes: H04L 7/08 the synchronisation signals recurring cyclically

Abstract

The present invention provides a method for detecting an uplink synchronization signal in a wireless access system supporting a high frequency band, a method for designing a detection filter for the same, and devices for supporting the methods. A method by which a base station detects a random access channel (RACH) signal in a wireless access system supporting a high frequency band, according to one embodiment of the present invention, comprises the steps of: allocating a cyclic shift value used in the base station; configuring a reception signal vector for signals transmitted through the RACH; deriving a cyclic shift candidate greater than or equal to a reference value from the reception signal vector by using a first detection filter; and detecting the RACH signal from the cyclic shift candidate by using a second detection filter, wherein the first detection filter and the second detection filter can be set on the basis of the cyclic shift value.

Claims

1. A method for detecting a Random Access Channel (RACH) signal by a base station in a wireless access system supporting a high frequency band, the method comprising:

allocating cyclic shift values used in the base station;

configuring a received signal vector for signals transmitted on a RACH;

deriving cyclic shift candidates whose correlation value between the received signal vector and a first detection filter is equal to or larger than a reference value, wherein the first detection filter corresponds to a filter on which a single effective channel is assumed; and

detecting a RACH signal using a second detection filter, corresponding to a filter on which multiple effective channels are assumed, within the cyclic shift candidates,

wherein the first detection filter and the second detection filter are configured based on the cyclic shift values.

2. The method according to claim 1, wherein the first detection filter is configured by [], where s⁽ⁱ⁾ represents an N×

1 Zadoff-Chu (ZC) sequence cyclically shifted by i, m represents the cyclic shift values, N represents a total length of the ZC sequence, and represents a modulo operation.

3. The method according to claim 1, wherein the second detection filter is configured in consideration of a number of effective channels of the RACH.

4. The method according to claim 3, wherein the second detection filter is configured by [. . . ], where s⁽ⁱ⁾ represents an N×

1 Zadoff-Chu (ZC) sequence cyclically shifted by i, m represents the cyclic shift values, L represents a number of the multiple effective channels, N represents a total length of the ZC sequence, and represents a modulo operation.

5. The method according to claim 1, wherein the cyclic shift values are set in consideration of a number of effective channels.

6. The method according to claim 1, wherein the cyclic shift candidates are periods during which a sequence correlation derived from a Zero Correlation Zone (ZCZ) is equal to or larger than the reference value.

7. A base station for detecting a Random Access Channel (RACH) signal in a wireless access system supporting a high frequency band, the base station comprising:

a transmitter;

a receiver; and

a processor configured to detect the RACH signal,

wherein the processor is configured to;

allocate cyclic shift values used in the base station,

configure a received signal vector for signals transmitted on the RACH,

derive cyclic shift candidates whose correlation value between the received signal vector and a first detection filter is equal to or larger than a reference value, wherein the first detection filter corresponds to a filter on which a single effective channel is assumed, and

detect a RACH signal using a second detection filter, corresponding to a filter on which multiple effective channels are assumed, within the cyclic shift candidates, and

wherein the first detection filter and the second detection filter are configured based on the cyclic shift values.

8. The base station according to claim 7, wherein the first detection filter is configured by [], where s⁽ⁱ⁾ represents an N×

1 Zadoff-Chu (ZC) sequence cyclically shifted by i, m represents the cyclic shift values, N represents a total length of the ZC sequence, and represents a modulo operation.

9. The base station according to claim 7, wherein the second detection filter is configured in consideration of a number of effective channels of the RACH.

10. The base station according to claim 9, wherein the second detection filter is configured by [. . . ] where s⁽ⁱ⁾ represents an N×

1 Zadoff-Chu (ZC) sequence cyclically shifted by i, m represents the cyclic shift values, L represents a number of the multiple effective channels, N represents a total length of the ZC sequence, and represents a modulo operation.

11. The base station according to claim 7, wherein the cyclic shift values are set in consideration of a number of effective channels.

12. The base station according to claim 7, wherein the cyclic shift candidates are periods during which a sequence correlation derived from a Zero Correlation Zone (ZCZ) is equal to or larger than the reference value.