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MIMO radar has multiple transmit channels and multiple receive channels, and the transmit channels can be separated by waveforms, or time, or frequencies, or polarizations at each receiver.
Parallel excitation using multiple transmit channels has emerged as an effective method to shorten multidimensional spatially selective radiofrequency (RF) pulses, which have a number of important applications, including B1 field inhomogeneity correction in high-field MRI.
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Sophisticated multiple-transmit-channel systems have been shown to be able to image the human heart at 7 tesla but such systems are currently not widely available.
Each RRH can have multiple transmit and receive channels, for instance, up to eight channels for a Time-Division Long Term Evolution (TD-LTE) RRH.
It is shown that the channel capacity could be increased logarithmically with the number of receive antennas for SIMO case; while employing 3 5 transmit antennas (irrespective of all other parameters considered herein) can approach the best advantage of the multiple transmit antenna systems as far as channel capacity is concerned for MISO case.
They transmit a single information stream over multiple transmit antennas without knowledge of the radio channel state.
This paper addresses synchronization and channel estimation aspects of a multiple transmit antenna system, whereas [19] only considered those of a single transmit antenna system.
The use of channel codes in combination with multiple transmit antennas achieves diversity, but the drawback is loss in bandwidth efficiency.
Diversity can be achieved without any sacrifice in bandwidth efficiency, if the channel codes are specifically designed for multiple transmit antennas.
MIMO systems can increase channel capacity gain (multiplexing gain) by using multiple transmit antennas and receive antennas.
This paper proposes a joint timing synchronization and channel estimation scheme for communications systems with multiple transmit antennas based on a well-designed training sequence arrangement.
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