Spatial Modulation is a very unique MIMO as this help to solve all the major problems in MIMO such as antenna synchronization and inter-symbol interference. This technique was introduced by Mesleh in 2006 achiving higher data rate. The Figure above shows a typical MIMO scheme with a transmitter side and a receiver side with couple of transmit antennas and receive antennas, transmitting across a channel H.
In this article, I will like to be as brief as possible and to be straight to the point by just giving a clear view of the system model of spatial modulation. In spatial modulation, single RF chain is used such that at every transmission instant only one antennas is transmitting and only one symbol is transmitted across the channel H and in the presence of AWGN (n). Therefore, eliminating ICI, ISI and IAS. This is made possible by by using spatial dimension to convey information. Thus, mapping additional information to its antenna index. The input bits stream of spatial modulation is divided into two major parts. one is to choose the antenna and the other modulate the symbol to be transmitted.
The signal is transmitted across a channel H in the presence of AWGN. The received signal is given by h*s + noise. Note that, s is of a dimension Tx by 1, and H is of dimension Rx by Tx and noise is of dimension Rx by 1.
The received signal can be detected using either optimal detection or sub optimal detection. Note in the premium package, the performance analysis and the simulations code is included with both optimal detection and sub-optimal detection
The premium package for spatial modulation includes:
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