Full duplex techniques for 5G networks: self-interference cancellation, protocol design, and relay selection

Residual self-interference (SI) cancellation in the digital baseband is an important problem in full-duplex (FD) communication systems. In this paper, we propose a new technique for estimating the SI and communication channels in a FD communication system, which is inspired from superimposed signaling. In our proposed technique, we add a constant real number to each constellation point of a conventional modulation constellation to yield asymmetric shifted modulation constellations with respect to the origin. We show mathematically that such constellations can be used for bandwidth efficient channel estimation without ambiguity. We propose an expectation maximization (EM) estimator for use with the asymmetric shifted modulation constellations. We derive a closed-form lower bound for the mean square error (MSE) of the channel estimation error, which allows us to find the minimum shift energy needed for accurate channel estimation in a given FD communication system. The simulation results show that the proposed technique outperforms the data-aided channel estimation method, under the condition that the pilots use the same extra energy as the shift, both in terms of MSE of channel estimation error and bit error rate. The proposed technique is also robust to an increasing power of the SI signal.

show abstract

“…, E b is the average bit energy which is defined below (2) and N 0 is the noise power spectral density.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…2 Note that it may be possible to achieve constellation asymmetry through other means, such as design of irregular modulation constellations. The optimum design of such modulation constellations is outside the scope of this work.…”

Section: Endnotesmentioning

confidence: 99%

Superimposed signaling inspired channel estimation in full-duplex systems

Koohian

Mehrpouyan

Nasir

et al. 2018

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

show abstract

“…Therefore, a full duplex radio had to employ procedures to terminate self-interference [14,15,16]. By means of benefit, the employment of SIC permits unified universal drifting, great amount of amenities, and low potential functions.…”

Section: ) Self-interference Cancellation (Sic)mentioning

confidence: 99%

5G Wireless Technologies- Future Generation Communication Technologies

Mahmod¹

2017

IJCDS

View full text Add to dashboard Cite

This paper focuses on the characterization of future wireless smartphone communication networks. This paper is focused on the evolution of the 5th generation smartphone network. 5th generation wireless networks was designed to be a perfect network on nationwide without any obstacles or limitations on accessing handling data than earlier generations. With 5G networks, users will surely notice a big change when accessing their phones experiencing a new edge of call volume. Many services in various fields will be offered to the users through 5G technologies such as Documentation, supporting electronic transactions (e-Payments, etransactions). This paper reviews an introduction to 5G along with a brief description of the evolution of 5G wireless network. It highlights all earlier generations of smartphone communication comparing them with fifth generation technology. It focuses on network architecture of 5th wireless technology as well. The paper also illustrates why there is a need for 5G along with some applications of 5G wireless communication. 5G wireless network technologies will add a new dimension to the users who accessing their Mobile Radio Communication (MRC), which provides them an advantage over preceded smartphone networks.

show abstract

“…However, SI supression and cancellation are complex tasks, based in costly hardware design and digital signal processing [66].…”

Section: B New Frame Structuresmentioning

confidence: 99%

5G – Wireless Communications for 2020

Barreto

Faria²,

Almeida³

et al. 2016

JCIS

View full text Add to dashboard Cite

Abstract-Existing cellular technologies are rapidly coming to their performance limits. This is due not only to the growth in data traffic and in the number of connected terminals, but also because we are on the verge of new era, where everyone and everything will be connected, with more demanding and varied requirements that cannot be satisfied by current networks. On account of this, efforts are being made all over the world to design new wireless technologies that will support the expected demands for the next decade. These technologies, embraced under the commercial name of 5 th generation, are currently being studied, and in this tutorial paper we will give an overview of the main trends that are likely to make their way in the next-generation standards.

show abstract

Full duplex techniques for 5G networks: self-interference cancellation, protocol design, and relay selection

Cited by 612 publications

References 16 publications

Superimposed signaling inspired channel estimation in full-duplex systems

Superimposed signaling inspired channel estimation in full-duplex systems

5G Wireless Technologies- Future Generation Communication Technologies

5G – Wireless Communications for 2020

Contact Info

Product

Resources

About