Back to results
US 2003/0147343 A1Published application
Linear space-time block code with block STTD structure
AssigneeTexas Instruments Incorporated
InventorsEko N. Onggosanusi, Anand G. Dabak
Life of this patent
Estimating the term…
Abstract
Space-time block code with structure of a block STTD. 2×2 blocks allow partial orthogonality for low-complexity detection and optimized diversity gain and coding gain.
Claims17
A method of space-time block code design, comprising;
- (a) for an integer N greater than 1, defining 2N×2N code matrices of the form
- 25 C ( s ) = [ C α C β - C β * C α * ]
- with N×N submatrices:
- Cα=Σ1≦m≦N sm Am+sm*BmCβ=ΣN+1≦m≦2N sm Am+sm*Bm
- where each of Am and Bm is a N×N complex matrix and s1, s2, . . . , s2N−1, s2N is a block of symbols.
2 more elements
A method of transmission, comprising;
- (a) space-time block encoding a symbol stream;
- and
- (b) transmitting the results from step (a) from a plurality of antennas;
- (c) wherein said space-time block code has 4×4 code matrices of the form
- 28 C ( s ) = [ c α C β - C β * C α * ]
- with 2×2 submatrices:
- Cα=s1 A1+s2 A2+s1*B1+s2*B2Cβ=s3 A3+s4 A4+s3*B3+s4*B4
- where each of Ak and Bk is a 2×2 complex matrix and s1, s2, s3, s4 is a block of symbols of said symbol stream.
5 more elements
A method of reception, comprising;
- (a) receiving signals of space-time block encoded symbol stream from a plurality of antennas;
- and
- (b) detecting said received signals including partitioning blocks of four received symbols for detection in two parallel 2×2 detectors;
- (c) wherein said space-time block code has 4×4 code matrices of the form
- 29 C ( s ) = [ c α C β - C β * C α * ]
- with 2×2 submatrices:
- Cα=si A1+s2 A2+s1*B1+s2*B2Cβ=s3 A3+S4 A4+s3*B3+s4*B4
- where each of Ak and Bk is a 2×2 complex matrix and s1, s2, s3, s4 is a block of symbols of said symbol stream.
5 more elements
Dependencies are inferred from the claim text.