Space–time block code: Difference between revisions

Revision as of 18:22, 23 March 2006

Revision as of 22:12, 24 March 2006

Line 62:

-s_2^* & s_1^*

\end{bmatrix}

</math>.,

where * denotes [[complex conjugate]].

It is readily apparent that this is a rate-1 code. It takes two time-slots to transmit two symbols. Using the optimal [[#Decoding|decoding]] scheme discussed below, the [[bit error rate|bit-error rate]] (BER) of this STBC is equivalent to <math>2n_R</math>-branch [[maximal ratio combining]] (MRC). This is a result of the perfect orthogonality between the symbols after receive processing &mdash; there are two copies of each symbol transmitted and <math>n_R</math> copies received.