US 12,267,199 B2
OFDM transmitter device having a symbol generator for generating non-zero control symbols, and OFDM transmission method including generating non-zero control symbols
Yoshinobu Matsumura, Osaka (JP); Tomohiro Kimura, Osaka (JP); and Mikihiro Ouchi, Osaka (JP)
Assigned to SUN PATENT TRUST, New York, NY (US)
Filed by Sun Patent Trust, New York, NY (US)
Filed on Mar. 20, 2024, as Appl. No. 18/610,583.
Application 14/325,998 is a division of application No. 13/254,954, granted, now 8,811,370, issued on Aug. 19, 2014, previously published as PCT/JP2010/007241, filed on Dec. 13, 2010.
Application 18/610,583 is a continuation of application No. 18/112,644, filed on Feb. 22, 2023, granted, now 11,968,071.
Application 18/112,644 is a continuation of application No. 17/668,613, filed on Feb. 10, 2022, granted, now 11,621,879, issued on Apr. 4, 2023.
Application 17/668,613 is a continuation of application No. 17/151,988, filed on Jan. 19, 2021, granted, now 11,283,662, issued on Mar. 22, 2022.
Application 17/151,988 is a continuation of application No. 16/711,911, filed on Dec. 12, 2019, granted, now 10,931,494, issued on Feb. 23, 2021.
Application 16/711,911 is a continuation of application No. 16/233,505, filed on Dec. 27, 2018, granted, now 10,547,483, issued on Jan. 28, 2020.
Application 16/233,505 is a continuation of application No. 14/657,158, filed on Mar. 13, 2015, granted, now 10,218,554, issued on Feb. 26, 2019.
Application 14/657,158 is a continuation of application No. 14/325,998, filed on Jul. 8, 2014, granted, now 9,042,365, issued on May 26, 2015.
Claims priority of application No. 2010-002634 (JP), filed on Jan. 8, 2010.
Prior Publication US 2024/0235916 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01)
CPC H04L 27/26524 (2021.01) [H04L 5/0048 (2013.01); H04L 27/2607 (2013.01); H04L 27/2613 (2013.01); H04L 27/2647 (2013.01); H04L 27/2662 (2013.01); H04L 27/2675 (2013.01); H04L 27/2698 (2013.01); H04L 27/2649 (2013.01)] 2 Claims
OG exemplary drawing
 
2. A transmitting device for transmitting a broadcast frame, comprising:
processing circuitry configured to:
generate a first control symbol and a second control symbol such that the first control symbol includes a first useful part, a first guard interval part following the first useful part, and a first additional guard interval part preceding the first useful part and that the second control symbol includes a second useful part and a second guard interval part preceding the second useful part, the first guard interval part being a copy of at least a portion of the first useful part with frequency shifted by a first amount, the first additional guard interval part being a copy of at least a portion of the first useful part, the second guard interval part being a copy of at least a portion of the second useful part with frequency shifted by a second amount, the second amount being different from the first amount; and
locate the first control symbol and the second control symbol in this order at a head of the broadcast frame; and
a transmitter configured to transmit the broadcast frame.