[Federal Register Volume 79, Number 125 (Monday, June 30, 2014)]
[Notices]
[Pages 36806-36807]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2014-15214]



[[Page 36806]]

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FEDERAL COMMUNICATIONS COMMISSION

[ET Docket No. 14-14 and GN Docket No. 12-268; DA 14-852]


Office of Engineering and Technology Seeks Comment on 
Measurements of LTE Into DTV Interference

AGENCY: Federal Communications Commission.

ACTION: Notice.

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SUMMARY: In this document, the Federal Communications Commission's 
(Commission) Office of Engineering and Technology (OET) seeks to 
supplement the record in the incentive auction proceeding by inviting 
comment on measurements of wireless Long-Term Evolution (LTE) 
interference into digital television (DTV) receivers conducted by OET 
engineers

DATES: Comments must be filed on or before July 11, 2014.

ADDRESSES: You may submit comments, identified by ET Docket No. 14-14 
and GN Docket No. 12-268, by any of the following methods:
     Federal Communications Commission's Web site: http://fjallfoss.fcc.gov/ecfs2/. Follow the instructions for submitting 
comments.
     Mail: Robert Weller, Office of Engineering and Technology, 
Electromagnetic Compatibility Division, Room 76-A140, Federal 
Communications Commission, 445 12th Street SW., Washington, DC 20554.
     People with Disabilities: Contact the FCC to request 
reasonable accommodations (accessible format documents, sign language 
interpreters, CART, etc.) by email: [email protected] or phone: 202-418-
0530 or TTY: 202-418-0432.
    For detailed instructions for submitting comments and additional 
information on the process, see the SUPPLEMENTARY INFORMATION section 
of this document.

FOR FURTHER INFORMATION CONTACT: Robert Weller, Office of Engineering 
and Technology, (202) 418-7397, email [email protected], and TTY 
(202) 418-2989.

SUPPLEMENTARY INFORMATION: This is a summary of the Commission's 
document, ET Docket No. 14-14, DA 14-852, released June 20, 2014. The 
full text of this document is available for inspection and copying 
during normal business hours in the FCC Reference Center (Room CY-
A257), 445 12th Street SW., Washington, DC 20554. The complete text of 
this document also may be purchased from the Commission's copy 
contractor, Best Copy and Printing, Inc., 445 12th Street SW., Room, 
CY-B402, Washington, DC 20554. The full text may also be downloaded at: 
www.fcc.gov.
    Pursuant to Sec. Sec.  1.415 and 1.419 of the Commission's rules, 
47 CFR 1.415, 1.419, interested parties may file comments on or before 
the date indicated on the first page of this document. Comments may be 
filed using the Commission's Electronic Comment Filing System (ECFS). 
See Electronic Filing of Documents in Rulemaking Proceedings, 63 FR 
24121 (1998).
     Electronic Filers: Comments may be filed electronically 
using the Internet by accessing the ECFS: http://fjallfoss.fcc.gov/ecfs2/.
     Paper Filers: Parties who choose to file by paper must 
file an original and one copy of each filing. If more than one docket 
or rulemaking number appears in the caption of this proceeding, filers 
must submit two additional copies for each additional docket or 
rulemaking number.

Filings can be sent by hand or messenger delivery, by commercial 
overnight courier, or by first-class or overnight U.S. Postal Service 
mail. All filings must be addressed to the Commission's Secretary, 
Office of the Secretary, Federal Communications Commission.
     All hand-delivered or messenger-delivered paper filings 
for the Commission's Secretary must be delivered to FCC Headquarters at 
445 12th Street SW., Room TW-A325, Washington, DC 20554. The filing 
hours are 8:00 a.m. to 7:00 p.m. All hand deliveries must be held 
together with rubber bands or fasteners. Any envelopes and boxes must 
be disposed of before entering the building.
     Commercial overnight mail (other than U.S. Postal Service 
Express Mail and Priority Mail) must be sent to 9300 East Hampton 
Drive, Capitol Heights, MD 20743.
     U.S. Postal Service first-class, Express, and Priority 
mail must be addressed to 445 12th Street SW., Washington DC 20554.
    People with Disabilities: To request materials in accessible 
formats for people with disabilities (braille, large print, electronic 
files, audio format), send an email to [email protected] or call the 
Consumer & Governmental Affairs Bureau at 202-418-0530 (voice), 202-
418-0432 (tty).

Summary

    1. On June 20, 2014, OET issued a public notice seeking to 
supplement the record in the incentive auction proceeding by inviting 
comment on measurements of wireless Long-Term Evolution (LTE) 
interference into digital television (DTV) receivers conducted by OET 
engineers.
    2. In the inter-service interference (ISIX) public Notice, OET 
invited comment on a methodology for predicting ISIX. For purposes of 
that methodology, OET assumed that the wireless services operating in 
the new 600 MHz Band will appear noise-like to the DTV receiver and 
hence, that the interference potential from LTE will be nearly 
identical to DTV-to-DTV interference. In addition, OET incorporated an 
off-frequency rejection (OFR) factor as a function of varying degrees 
of spectral overlap due to filter roll-off in the misaligned future 
wireless blocks and existing TV channels in the 600 MHz Band. OET also 
added 0.8 dB to the interfering wireless signal to account for the 
possibility of co-channel power from multiple wireless blocks affecting 
one 6 MHz TV channel. Several commenters raised concerns about these 
assumptions which form the basis for the D/U ratios of Table 8, the OFR 
values of Table 9, and the assumed effective radiated power (ERP) in 
Table 10 of the ISIX Notice.
    3. In April 2014, OET engineers tested the characteristics of LTE-
into-DTV interference in the FCC Laboratory, and the results of those 
measurements are presented in the report. As explained in the report, 
four DTV receivers were tested in order to obtain a reasonable 
indication of their behavior in the presence of an interfering LTE 
eNodeB signal.
    4. Additionally, the Consumer Electronics Association (CEA) 
submitted measurements of LTE to DTV interference on six newer model 
television receivers and two older model receivers.

Specific Topics of Comment

    5. OET seeks comment on the measurements and observations discussed 
in OET's Report. Specifically, OET seeks comment on whether these 
measurements, in conjunction with CEA's measurements, support the D/U 
ratios, OFR, and power adjustments that appear in Tables 8, 9, and 10 
of the ISIX Notice.
    6. OET also seeks comment on the relevance of the measurements 
associated with two receiver models that are more than 7 years old. The 
OET Report contains measurements of a 2007 model year receiver and the 
CEA Report contains measurements of a 2006 model year receiver. OET 
anticipates that these receivers will no longer be commercially 
available and will be approaching the end of their useful

[[Page 36807]]

lifecycle at the time of the wireless build out in the 600 MHz Band.
    7. The Notice was issued pursuant to Sec.  0.31 of the Commission's 
rules by the Office of Engineering and Technology, a member of the 
Incentive Auction Task Force.

Federal Communications Commission.
Julius P. Knapp,
Chief, Office of Engineering and Technology.
[FR Doc. 2014-15214 Filed 6-27-14; 8:45 am]
BILLING CODE 6712-01-P