Performance analysis of frequency hopping satellite communication system reducing the transient response of Polyphase DFT filter

Digital filter banks have played a key role in the area of satellite communication systems over the last decades. Filter banks have been widely used in the field of multi-channel signal processing for their simple efficient implementation architectures. Especially, the polyphase DFT (Discrete Fourier Transform) filter bank is the most preferred filter bank for the uniform spaced multi-channel processing due to its simplicity. In frequency hopped communication systems, however, the use of the polyphase DFT filter bank is limited due to its undesirable transient response from hop-to-hop transitions. In this paper, the transient response of polyphase DFT filter banks in the hop-to-hop transition was analyzed, and the efficient method to overcome such a problem was proposed. Simulation results showed that the proposed schemes could resolve this issue efficiently.