Prosecution Insights
Last updated: May 04, 2026
Application No. 18/532,219

METHOD OF PERFORMING SYNCHRONIZATION AND FREQUENCY OFFSET ESTIMATION USING ISI CONSIDERED REFERENCE SIGNAL AND RECEIVER PERFORMING THE SAME

Non-Final OA §103
Filed
Dec 07, 2023
Priority
Jan 27, 2023 — RE 10-2023-0010817
Examiner
NGUYEN, THAI
Art Unit
2469
Tech Center
2400 — Computer Networks
Assignee
Samsung Electronics Co., Ltd.
OA Round
1 (Non-Final)
85%
Grant Probability
Favorable
1-2
OA Rounds
4m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 85% — above average
85%
Career Allowance Rate
662 granted / 779 resolved
+27.0% vs TC avg
Moderate +14% lift
Without
With
+14.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
20 currently pending
Career history
799
Total Applications
across all art units

Statute-Specific Performance

§101
8.2%
-31.8% vs TC avg
§103
41.8%
+1.8% vs TC avg
§102
10.8%
-29.2% vs TC avg
§112
30.0%
-10.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 779 resolved cases

Office Action

§103
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1, 8 are rejected under 35 U.S.C. 103 as being unpatentable over Vanderperren et al (USPN 20060014494) in view of Shin et al (USPN 20170223648). Regarding claim 1, Vanderperren discloses a method of performing synchronization and frequency offset estimation for an input signal, the method comprising: (method of synchronizing and performing frequency offsetting for an input signal [0001, 0002, 0019 receiving an input signal through a wireless channel (receiver wirelessly receiving signal [0019], FIG. 1 performing a frequency compensation operation on the input signal based on a reference signal to generate a compensated signal (performing frequency compensation on the received signal based on a known training sequence [0019] Vanderperren does not expressly disclose the reference signal corresponding to an access code associated with the input signal; determining a synchronization timing and frequency offset for the input signal by comparing the reference signal with the compensated input signal Shin discloses the reference signal corresponding to an access code associated with the input signal (reference signal generated following predefined sequence between terminal and base station [0015, 0245] determining a synchronization timing and frequency offset for the input signal by comparing the reference signal with the compensated input signal (determining time and frequency offsets for synchronization by comparing a reference signal with compensated received/input signal [0010, 0013, 0020] Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to implement “the reference signal corresponding to an access code associated with the input signal; determining a synchronization timing and frequency offset for the input signal by comparing the reference signal with the compensated input signal” as taught by Shin into Vanderperren’s system with the motivation to determine time and frequency offsets by differentiating a reference signal with a compensated input signal (Shin, paragraph [0010, 0013, 0020]). Regarding claim 8, Vanderperren does not expressly disclose “the method is performed by an electronic device including a storage unit and the access code and the reference signal are stored in the storage unit included in the electronic device” Shin discloses method performed by terminal comprising a memory, FIG. 27 #2720 #2722, and the sequence used for generating reference signal and reference signal itself are contained within the terminal’s memory [0007, 0013, 0245] Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to implement “the method is performed by an electronic device including a storage unit and the access code and the reference signal are stored in the storage unit included in the electronic device” as taught by Shin into Vanderperren’s system with the motivation to determine time and frequency offsets by differentiating a reference signal with a compensated input signal (Shin, paragraph [0010, 0013, 0020]). Allowable Subject Matter Claims 2-7, 9-15 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Claims 16-20 are allowed. The following is an examiner’s statement of reasons for allowance: Claims 16-20 are allowed over prior arts of record because the arts of record fail to reasonably suggest, or render obvious the following italic limitations: … calculate a symbol error of the input signal by comparing the reference signal with the compensated input signal; and …determine a synchronization timing and a frequency offset for the input signal based on the symbol error of the input signal .… in combination with other limitations recited as specified in claims 16, 20. The first closest art Vanderperren et al (USPN 20060014494) discloses a method of performing synchronization and frequency offset estimation for an input signal, the method comprising: (method of synchronizing and performing frequency offsetting for an input signal [0001, 0002, 0019]. Receiving an input signal through a wireless channel (receiver wirelessly receiving signal [0019], FIG. 1. Performing a frequency compensation operation on the input signal based on a reference signal to generate a compensated signal (performing frequency compensation on the received signal based on a known training sequence [0019]. However, Vanderperren fails to disclose or render obvious the above italic as claimed. The second closest prior art Shin et al (USPN 20170223648) discloses a method for synchronizing frequency and time in a wireless communication between a terminal and a base station utilizing a PSS (Abstract). The invention uses a reference signal corresponding to an access code associated with the input signal (reference signal generated following predefined sequence between terminal and base station [0015, 0245]. Determining a synchronization timing and frequency offset for the input signal by comparing the reference signal with the compensated input signal (determining time and frequency offsets for synchronization by comparing a reference signal with compensated received/input signal [0010, 0013, 0020]. However, Shin fails to disclose or render obvious the above italic as claimed. Thus, Vanderperren, Shin taken individually or in combination fails to particularly disclose, fairly suggest, or render obvious the above italic limitations as claimed Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Warner (WO 2005081484 A1) FIG. 7 Any inquiry concerning this communication or earlier communications from the examiner should be directed to THAI NGUYEN whose telephone number is (571)270-7632. The examiner can normally be reached M-F campus 10:30-5pm, telework 6pm-8pm| Telework count days. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Ian N Moore can be reached at (571)272-3085. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /THAI NGUYEN/Primary Examiner, Art Unit 2469
Read full office action

Prosecution Timeline

Dec 07, 2023
Application Filed
Jan 21, 2026
Non-Final Rejection — §103
Mar 06, 2026
Examiner Interview Summary
Mar 06, 2026
Applicant Interview (Telephonic)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
85%
Grant Probability
99%
With Interview (+14.5%)
2y 9m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 779 resolved cases by this examiner. Grant probability derived from career allowance rate.

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