An Improved Frequency-Hopping System with No-Hit-Zone Hopping Pattern Based on Adaptive Array Receiver for Anti-Interference
Qi Wen Zeng, Xing Liu, Jun Zhong · 2019
Anti-interference is a major challenge in wireless communications. In this paper, a new set of optimal no-hitzone (NHZ) frequency-hopping (FH) sequence (so-called NHZ FH pattern) are constructed, which offers lower frequency-hits than other hopping patterns. With such a NHZ FH pattern, an improved FH system using an adaptive beam-forming (BF) receiver (NHZ/FH-BF system) is investigated for the interference mitigation. By combining NHZ/FH and BF techniques, the proposed system can fully harness the advantage of antiinterference from the spatial and the frequency domains to improve the anti-interference capability. The numerical and simulation results show that the anti-interference performance and the spectral efficiency of the proposed NHZ/FH-BF system significantly outperform the traditional systems, i.e., the NHZ/FH system with single antenna and the FH-BF system with the uniformly-distributed FH pattern.