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It is readily apparent that this is a rate-1 code. It takes two time-slots to transmit two symbols. The bit error rate (BER) of this STBC is equivalent to 2nR-branch maximal ratio combinig (MRC). This is a result of the perfect orthogonality between the symbols after receive processing — there are two copies of each symbol
In order that MIMO spatial multiplexing can be utilised, it is necessary to add coding to the different channels so that the receiver can detect the correct data. There are various forms of terminology used including Space-Time Block Code - STBC, MIMO precoding, MIMO coding, and Alamouti codes.
As a reference, a linear space-time block code (STBC) from [12] is also shown, with and without a concatenated AWGN trellis code. (STBC + TCM). The STBC does not provide coding gain but does provide full diversity, which is of order. D Mr for both the STBC and the STTCs considered here. In Figure 9 (a) note that STBC
Coding gain and diversity in MIMO channels. 2. Part II - Information Theory. Capacity when channel is unknown at transmitter. Outage probability for non-ergodic channels. 3. Part III - Coding. Quick introduction to STBC. Code design criteria for block fading channels. Example of an LDPC code for MIMO channels.
31 Jan 2005 2. HELSINKI UNIVERSITY OF TECHNOLOGY. Signal Processing Laboratory. SMARAD Centre of Excellence. Outline. Introduction. Space Time codes. Alamouti codes. Space-Time block codes. Space-time Trellis Codes. Differential Space-Time block codes. Space-Time for OFDM systems. Conclusions.
The Alamouti code could be considered as the original Space-Time Block Code (STBC) - the. Space Time Codes (STCs) constructed from orthogonal designs. Codes (STBC). The space-time encoding process is presented by Fig. 2.5. This block of the transmitted symbols is mathematically represented by a matrix X of
5 Jan 2017 MIMO technologies can be divided into two main categories: diversity and spatial-multiplexing. The diversity techniques intend to receive the same information-bearing signals in multiple antennas or to transmit them from multiple antennas, thereby improving the transmission reliability.
17 Apr 2012 Alamouti Codes• Simple yet very effective• Space diversity at transmitter end At t1 At t2 X1, X2 X1 -X2* Symbol Transmit Ant1 bits Calculation Antenna X2 X1* Ant217 April 2012 9; 10. Alamouti Code• Assume two transmit antennas and one receive antenna.• The space-time block code transmission matrix is
11 Aug 2015
This is a very special STBC. It is the only orthogonal STBC that achieves rate-1. That is to say that it is the only STBC that can achieve its full diversity gain without needing to sacrifice its data rate. Strictly, this is only true for complex modulation symbols. Since almost all constellation

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March 2018