| US 7,508,880 B2 | ||
| Apparatus and method for space-time-frequency block coding for increasing performance | ||
| Sung-Ryul Yun, Suwon-si (Korea, Republic of); Chan-Byoung Chae, Seoul (Korea, Republic of); Hong-Sil Jeong, Seoul (Korea, Republic of); Won-Il Roh, Yongin-si (Korea, Republic of); Dong-Seek Park, Yongin-si (Korea, Republic of); Jae-Yoel Kim, Suwon-si (Korea, Republic of); Jeong-Tae Oh, Yongin-si (Korea, Republic of); and Kyun-Byoung Ko, Hwasung-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., (Korea, Republic of) | ||
| Filed on Aug. 17, 2005, as Appl. No. 11/205,669. | ||
| Claims priority of application No. 10-2004-0064799 (KR), filed on Aug. 17, 2004; and application No. 10-2005-0019850 (KR), filed on Mar. 09, 2005. | ||
| Prior Publication US 2006/0039500 A1, Feb. 23, 2006 | ||
| Int. Cl. H04B 7/02 (2006.01) | ||
| U.S. Cl. 375—267 [375/299; 375/341; 375/347; 375/349; 375/135; 375/146; 375/147] | 20 Claims |
| 1. A transmitter with three transmit antennas in a communication system using a space-time-frequency block coding scheme,
the transmitter comprising:
a pre-coder for pre-coding a symbol vector of an input symbol sequence by multiplying the symbol vector by ejθ, θ being a phase rotation angle, reconstructing the symbol vector multiplied with ejθ and outputting pre-coded symbols c1, c2, c3, and c4, given as,
c1=x1+jy3
c2=x2+jy4
c3=x3+jy1
c4=x4+jy2
where ck represents a kth pre-coded symbol, xk represents a real term of kth symbol within the symbol vector multiplied with ejθ, and jyk represents an imaginary term of kth symbol within the symbol vector multiplied with ejθ; and
a space-time-frequency block code (STFBC) mapper for selecting an STFBC using a permutation matrix in which the following
matrices A, B and C are arranged in a predetermined order, mapping the pre-coded symbols to the transmit antennas according
to the selected STFBC, and transmitting the mapped symbols through the transmit antennas,
 where a row represents sysmbols for a corresponding antenna and a column represents symbols mapped with a subcarrier.
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