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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 12 Issue: 05 | May 2025

p-ISSN: 2395-0072

www.irjet.net

Successive Interference Cancellation-based Channel Estimation for FullDuplex Systems H.Raseena Barwin 1, Dr.Geetha M.R ,2, R.Rathi3, N.K.Arul raj4 1PG Scholar, Communication and networking, Ponjesly college of engineeringy, Kanyakumari.

2Professor Electronics & Communication department, Ponjesly college of engineering, Kanyakumari. 3Assistant Professor Electronics & Communication department, Ponjesly college of engineering,

Kanyakumari.

4 Assistant Professor Electronics & Communication department, Ponjesly college of engineering,

Kanyakumari.

-----------------------------------------------------------------------***------------------------------------------------------------------------and 6G are on the horizon. The in-band full-duplex (IBFD) Abstract - A possible method for fusing sensing and

technology receives a lot of interest and is a promising design. With simultaneous transmission and reception on the same frequency range, this technology can significantly improve spectral efficiency. Numerous applications and interests, such as network capacity and throughput, bidirectional communication delay, spectrum utilization, relay network performance, and effective cognitive radio systems, can also be greatly enhanced by the IBFD. Given its importance, IBFD may be a crucial enabler for new applications like Integrated Sensing and Communications (ISAC) systems, which seek to accomplish data transmission and sensing at the same time [2].

communication capabilities to transmit data and detect the physical environment at the same time is the integrated sensing and communications (ISAC) system. It nevertheless need sustainable high-data transmission with effective spectrum usage, even though its goal is to comprehend the communication environment and channel situation with sensing capabilities. Increasing spectrum efficiency while supporting high data transmission may be feasible with the in-band full-duplex (IBFD) system. We must look into potential methods to address IBFD's self interference problem, which is one of the major causes that degrades its performance. In this research, we propose an enhanced selfimpedance cancellation receiver for the IBFD system that uses channel estimates based on successive interference cancellation (SIC). Our suggested approach incorporated SIC to the channel estimation for the performance gain since it seeks to reduce the effects of various interferences. Our findings demonstrate that the IBFD bit error rate (BER) of the new radio (NR) for the ISAC system is enhanced by SI cancellation combined with SIC-based channel estimation.

IBFD can enable simultaneous environmental sensing and high-speed data transfer for vehicle localization and high data transmission in ISAC scenarios, including autonomous driving, increasing system efficiency overall [2], [3]. Even though the IBFD system can solve a number of problems and use all of its capacity by transmitting and receiving simultaneously, the transmit signal's high self-interference power leads to the IBFD system's low signal-tointerference-plus-noise ratio (SINR), which severely impairs receiver performance [4]. IBFD systems in multiple mobility devices can cause these specific low SINR issues by doubling multiple interference signals with significant high-power presence on the spectrum, as illustrated in Fig. 1. This is especially true in a mobility as a service (MaaS) scenario where multiple small mobility devices are present in indoor or urban environments. The low SINR scenario at the IBFD system was mitigated by a number of remedies. Self-interference (SI) cancellation strategies have been proposed to improve SINR in the IBFD system, particularly in light of the low SINR of the data symbols produced by the transmit signal's selfinterference [5]–[7]. Using a variety of techniques, the literature now in publication also suggests potential fixes for the IBFD system and self-interference cancellation. One

KeyWords: Channel estimation, in-band full-duplex (IBFD), integrated sensing interference (SI) cancellation (SIC). and communications (ISAC), self-cancellation, successive interference.

1. INTRODUCTION A communication system's primary goal is to transfer data in an adequate and dependable way. The development of cellular communication and heavily data-driven services has altered this perception. Wireless communication systems should have more functions and uses beyond only data transport, as demonstrated by the recent rollout of 5G and the technical roadmap for 5G and 6G [1]. Numerous communication and signal processing strategies could be included in new wireless communication systems since 5G

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