Minimization of Loop-Back Self Interference in Full-Duplex Relaying
Kunja viswasanthi1, Chindam Hari Prasad2, Ch. Ganapathy Reddy3

1Kunja viswasanthi, M.Tech Student, ECE Department, GNITS, Hyderabad, India.
2Ch.Hariprasad, Asst. Professor, ECE Department, GNITS, Hyderabad, India.
3Ch.Ganapathy Reddy, Professor & HOD, GNITS, India.
Manuscript received on September 04, 2013. | Revised Manuscript Received on September 16, 2013. | Manuscript published on September 20, 2013. | PP: 30-34 | Volume-1, Issue-10, September 2013. | Retrieval Number: J03190911013/2013©BEIESP
Open Access | Ethics and Policies | Cite
© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (

Abstract: Full duplex relaying is more spectrally efficient than the half-duplex relaying. Multi-hop communication is a promising technique to provide more extensive coverage area, high throughput, better performance and it consumes low transmit power. Loop-back self interference maybe occurred due to signal leakage from relay transmission to its own reception. Previous technique i.e.; time-domain cancellation tackle the problem that it does not exploit the spatial domain. e.g., low rank cannot be exploited to improve the performance. In order to overcome the drawback of time-domain cancellation, propose a Spatial suppression scheme i.e., Null-space projection which exploits the spatial domain and improves the performance.
Keywords: full-duplex, interference cancellation, multiple-input multiple-output (MIMO) relay, minimum mean square error (MMSE), null-space projection, self-interference.