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We consider the performance of a low complexity Vertical Bell Laboratories Layered Space Time system with a maximum ratio combining receiver (LC-VBLAST) in an uplink massive multiple-input-multiple-output (MIMO) deployment with single antenna users. This receiver is known to give a similar error rate performance to zero forcing (ZF) for simple systems while reducing complexity. In this paper, we show...
The design of linearly polarized dual-band substrate integrated waveguide (SIW) antenna/array operating at Ka-band is proposed. The single antenna element consists of a SIW cavity with two longitudinal slots engraved in one of the conducting planes. The longer and shorter slots are resonating at 28 GHz and 38 GHz, respectively. Only the simulated results are presented. All simulations have been carried...
This paper presents a reflectarray antenna working at 28 GHz with polarization independent characteristics. The unit cell is composed of three circular rings optimized to achieve linear phase characteristics with the variation of the unit cell size. The array is composed of 400 unit cells of variable size arranged in a square shape aperture in order to direct the reflected wave in a direction normal...
Harvesting energy from environmental sources has been of particular interest during these last few years especially from the electromagnetic waves. It has been recently reported that radio frequency rectennas (receiving antenna+ rectifying circuit), enable to collect microwave radiations and convert it to DC power [1-4]. The 60-GHz band is one potential solution to provide up to multi-Gb/s wireless...
Space-time block codes offer transmit diversity in Multiple Input Multiple Output wireless systems. Orthogonal and quasi-orthogonal space-time block codes have been developed for improving the performance of wireless communication systems. Three time slot-two transmit antenna systems are of interest in many practical situations in Long Term Evolution-Advanced 4G standard. Quasi-orthogonal and hybrid...
A robust digital modulation scheme, called differential on-on keying (DOOK), is presented in this paper which outperforms the conventional on-off keying (OOK). In this scheme, a sinusoidal signal is transmitted during the first half of the bit duration while a replica or an inverted version of the sinusoidal signal is transmitted during the second half for logic one or logic zero, respectively. Non-coherent...
Recently, two promising modulation techniques have been developed aiming to increase data rate and save energy while being simple to implement. These modulation schemes belong to two different communication methods, however, they share the common structure of using an index as an additional parameter to convey information. The first scheme known as spatial modulation (SM), is a scheme that uses multiple...
This paper presents a hybrid automatic repeat request (HARQ) scheme based on turbo product codes (TPC) error correction and self-detection. The TPC inherent error detection is used as an alternative to the conventional cyclic redundancy check (CRC) process and is utilized to implement partial retransmission. The proposed HARQ system attempts to identify the location of errors within the TPC codeword...
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