## What is/are Mimo Operation?

Mimo Operation - The proposed method is used to design a handset antenna with small ground clearance of 5 mm capable of^{[1]}In order to meet the requirement of dual-band MIMO operation in 5G smartphones, a 12-port dual-band inverted F-shaped antenna array for 3.

^{[2]}This solution achieves a very high cross polarization discrimination ratio (>25dB), which is critical in the MIMO operation of the dual polarization network.

^{[3]}Gains in area spectral efficiency have been recently demonstrated in networks of large-antenna arrays by means of fog massive MIMO operation and virtual sector-based processing.

^{[4]}7 times of 2 × 2 MIMO operation.

^{[5]}For MIMO operation, a central chirp signal from a sub-sampling PLL integrated in 28nm CMOS [1] is distributed to multiple TRX chips on a PCB, eliminating mm-wave signal routing.

^{[6]}The two conjoined dual antennas provide four wide operating bands for $4 \times 4$ MIMO operation in 5G band of 3300 MHz ∼ 5000 MHz and in 5 GHz-WiFi band of 5150 MHz ∼ 5875 MHz.

^{[7]}To preserve full field-of-view (FoV) and multi-beam/MIMO operations, digital arrays often skip FoV-limited front-end beamforming and rely on digital backends for spatial filtering [1].

^{[8]}IoT applications leads to increasing demands in high traffic volume, M2M communications, low latency, and MIMO operations.

^{[9]}This paper presents a complete 5G phased-array base-station, which consists of 2x32 element phased-arrays, each with vertical and horizontal polarization (V&H) for 5G polarization MIMO operation.

^{[10]}The vector modulators in the transmit (TX) paths allow the application of complex bit streams of second-order delta–sigma modulators easily generated on a field-programmable gate array (FPGA) to implement single-sideband (SSB) modulation on the TX signals resulting in orthogonal waveforms for the MIMO operation.

^{[11]}The distributed MIMO operation in dense Time Division Duplex (TDD) radio networks requires accurate time and frequency synchronization and calibration for precoding.

^{[12]}25bps/Hz and is about 3 times of $2\times2$ MIMO operations.

^{[13]}Three individual transmitters (TXs) and four receivers (RXs) are integrated for MIMO operation to achieve higher resolution and sensitivity.

^{[14]}The array antenna available in a system is divided into subgroups which are coherently creating multiple channels over space which is basically MIMO operation.

^{[15]}MIMO operation increases the SIC requirements by a factor of

^{[16]}In this paper, we introduce MIMO operation to boost the LAA-Wi- Fi coexistence.

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