Source: https://patents.google.com/patent/US8204025B2/en
Timestamp: 2019-04-21 16:22:01
Document Index: 145151503

Matched Legal Cases: ['§119', 'Application No. 60', 'Application No. 60', 'Application No. 61', 'Application No. 61', 'Application No. 61', 'Application No. 61']

US8204025B2 - Flexible OFDM/OFDMA frame structure for communication systems - Google Patents
US8204025B2
US8204025B2 US12/267,502 US26750208A US8204025B2 US 8204025 B2 US8204025 B2 US 8204025B2 US 26750208 A US26750208 A US 26750208A US 8204025 B2 US8204025 B2 US 8204025B2
US12/267,502
US20090185632A1 (en
2008-11-07 Application filed by ZTE USA Inc filed Critical ZTE USA Inc
2009-04-02 Assigned to ZTE (USA) INC. reassignment ZTE (USA) INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CAI, SEAN, FANG, HUIYING, QU, HONGYUN, CHOW, JERRY
2009-07-23 Publication of US20090185632A1 publication Critical patent/US20090185632A1/en
2012-06-19 Publication of US8204025B2 publication Critical patent/US8204025B2/en
This application claims benefit of priority under 35 U.S.C. §119(e) to Provisional Application No. 60/986,809, entitled “Flexible OFDM/OFDMA Frame Structure For Communication Systems”, filed Nov. 9, 2007; Provisional Application No. 60/987,747, entitled “Flexible OFDM/OFDMA Frame Structure For Communication Systems”, filed Nov. 13, 2007; Provisional Application No. 61/020,690, entitled “Flexible OFDM/OFDMA Frame Structure For Communication Systems”, filed Jan. 11, 2008; Provisional Application No. 61/021,442, entitled “Flexible OFDM/OFDMA Frame Structure For Communication Systems”, filed Jan. 16, 2008; Provisional Application No. 61/031,658, entitled “Flexible OFDM/OFDMA Frame Structure For Communication Systems”, filed Feb. 26, 2008; and Provisional Application No. 61/038,030, entitled “OFDM/OFDMA Frame Structure For Communication Systems”, filed Mar. 19, 2008, all of which are incorporated by reference herein in their entirety.
T offset - sub ⁡ [ n ] = ∑ i = 1 n - 1 ⁢ T sub ⁡ [ i ] .
Problem No. 2 is that legacy numerology has low spectral efficiency due to unused guard subcarriers. The numerology based on a typical legacy 16e design can be found in Table 310 a of IEEE 802.15e 2005. Out of 914 subcarriers that fall into the 10 MHz bandwidth, there are only 840 subcarriers that can be used to transmit information—8.8% of the bandwidth is wasted. Furthermore, the bandwidth occupied by the 914 subcarriers does not fully fill the 10-Mhz carrier bandwidth. The following is the formula on how to calculate the maximum frequency efficiency:
n Efficiency = R Modulation × n UsedSubcarriers T symobol × BW System ( Eq . ⁢ 2 ⁢ - ⁢ 1 )
T symobol = 1 f Δ ( Eq . ⁢ 2 ⁢ - ⁢ 2 )
n Efficiency ≤ R Modulation × n UsedSubcarriers n MaximumSubcarriers ( Eq . ⁢ 2 ⁢ - ⁢ 4 )
Number of Short CP (NS) 6 8 12 18 24 30
OFDM Normal CP (NR) 5 7 10 16 22 27
Symbols Long CP (NL) 4 6 10 15 20 26
Per Sub- Long CP 2 (NL) 4 6 9 14 19 24
Number of Short CP (NS) 11 15 23 35 46 58
OFDM Normal CP 9 13 19 29 39 49
Symbols Per (NR)
Long CP 2 7 10 16 24 32 41
DL or TTG- Long CP 60 70 65 70 75 80
UL) Long CP 2 80 75 40 60 80 40
US12/267,502 2007-11-09 2008-11-07 Flexible OFDM/OFDMA frame structure for communication systems Active 2028-11-22 US8204025B2 (en)
US12/986,097 US9509464B2 (en) 2007-11-09 2011-01-06 Flexible OFDM/OFDMA frame structure for communication systems
US12/986,122 Division US8953615B2 (en) 2007-11-09 2011-01-06 Flexible OFDM/OFDMA frame structure for communication systems
US12/986,097 Division US9509464B2 (en) 2007-11-09 2011-01-06 Flexible OFDM/OFDMA frame structure for communication systems
US20090185632A1 US20090185632A1 (en) 2009-07-23
US8204025B2 true US8204025B2 (en) 2012-06-19
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JP2016201642A (en) * 2015-04-08 2016-12-01 日本放送協会 Radio communication apparatus, radio communication method, radio communication system, and chip
TWI643513B (en) * 2016-08-12 2018-12-01 華碩電腦股份有限公司 A method and apparatus for a wireless communication system for determining basic parameters bandwidth
KR20070062530A (en) 2004-10-09 2007-06-15 지티이 코포레이션 Method for assigning frequency spectrum bandwidth of an ofdm and ofdma coexistence system
International Search Report and Written Opinion for PCT/US2008/082906, mailed Jun. 9, 2009, 13 pages.
US20110096783A1 (en) 2011-04-28
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAI, SEAN;CHOW, JERRY;QU, HONGYUN;AND OTHERS;REEL/FRAME:022509/0065;SIGNING DATES FROM 20090122 TO 20090306
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CAI, SEAN;CHOW, JERRY;QU, HONGYUN;AND OTHERS;SIGNING DATES FROM 20090122 TO 20090306;REEL/FRAME:022509/0065