Linear space-time block code with block STTD structure
First Claim
Patent Images
1. A method of space-time block encoding for communication with a remote wireless device, comprising;
- (a) for an integer N greater than 1, defining 2N×
2N code matrices of the form with N×
N submatrices;
Cα
=Σ
1≦
m≦
N sm Am+sm*Bm
Cβ
=Σ
N+1≦
m≦
2N sm Am+sm*Bmwhere each of Am and Bm is a N×
N complex matrix and s1, s2, . . . , s2N−
1, s2N is a block of symbols.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
17 Claims
-
1. A method of space-time block encoding for communication with a remote wireless device, comprising;
-
(a) for an integer N greater than 1, defining 2N×
2N code matrices of the formwith N×
N submatrices;
Cα
=Σ
1≦
m≦
N sm Am+sm*Bm
Cβ
=Σ
N+1≦
m≦
2N sm Am+sm*Bmwhere each of Am and Bm is a N×
N complex matrix and s1, s2, . . . , s2N−
1, s2N is a block of symbols.- View Dependent Claims (2, 3, 4, 5, 6, 7)
where the matrix is a unitary matrix, and right multiplications of such pairs by a 2×
2 orthogonal matrix.
-
-
8. A method of transmission to a remote receiver, 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 formwith 2×
2 submatrices;
Cα
=s1A1+s2A2+s1*B1+s2*B2
Cβ
=s3A3+s4A4+s3*B3+s4*B4where 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.- View Dependent Claims (9, 10, 11, 12)
-
-
13. A method of reception from a remote transmitter, 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 formwith 2×
2 submatrices;
Cα
=s1A1+s2A2+s1*B1+s2*B2
Cβ
=s3A3+S4A4+s3*B3+s4*B4where 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.- View Dependent Claims (14, 15, 16, 17)
-
Specification