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It will also likely be more reliable, because fewer packets are required to transmit SMS compared with data-based messages such as those exchanged over WhatsApp or iMessage.
With support from Pak Vista Shared technologies, mobile phone will be used to transmit SMS messages to CMW clients and family members.
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At this point, it is worth noting that if we choose to use only the spatial constellation of SM to transmit information, then SM is reduced to space-shift-keying (SSK) as proposed in[17].
In general, there are two primary modes, SM and transmit diversity (TD) for DL.
In both LTE and WiMAX, spatial multiplexing (SM) and transmit diversity have been adopted as the two major MIMO schemes.
By only activating a single transmit antenna for any transmission, SM entirely avoids inter-channel interference, requires no synchronisation between the transmit antennas and a single radio frequency chain at the transmitter.
Undoubtedly, the proposed method paves a new way to design differential SM schemes with more transmit antennas.
In conclusion, the current WRN uses its relays either to offer high throughput only (using SM) or to achieve transmit diversity gain (using D-STBC).
In SM-SD the transmitters transmit at the same time and frequency and a joint signal is formed at the receiver.
For single fiber based systems, this translates into using double-clad fibers (DCFs) where the SM core transmits illumination light and the inner cladding acts as a larger collection aperture.
Let us consider a coded SM-MIMO system with N t transmit antennas and N r receive antennas, which is depicted in Fig. 1.
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