Sentence examples for multiple antennas have from inspiring English sources

Wireless communication systems with multiple antennas have recently attracted considerable interests [1 3].

Cooperation with multiple relays, or relays with multiple antennas have extensively been treated in the wireless literature, cf. e.g., [11, 12] and references therein.

On the other hand, the recent advances and the extensive use of multiple antennas have already been included in several commercial standards, where the multibeam opportunistic transmission beamforming strategies have been proposed to improve the performance of the wireless systems.

Recently, sensors with multiple antennas have become an integral part of many cognitive receivers [2, 3], thus giving us the chance to consider multi-antenna techniques to improve the performance of spectrum sensing.

Recently, Doppler compensation via exploiting multiple antennas has attracted a lot of attention.

The idea of multiple antennas has evolved into multiple-input multiple-output (MIMO) system, which provides transmit and receive diversities.

However, correlation between multiple antennas has an adverse effect as shown in [10], especially when correlation affects the BS side.

Moreover, the secrecy capacity of the wiretap channel with multiple antennas has been studied in [8 13, 15] and references therein.

Spatial diversity, through the use of multiple antennas, has proved to be very efficient to combat the effects of fading in wireless systems [2].

The use of relays together with using multiple antennas has made it a versatile technique to be used in emerging wireless technologies [15 20].

However, in [23], the channel capacity for systems employing multiple antennas has been proposed as a more pragmatic performance merit than the received signal envelope.