| Summary: | 碩士 === 逢甲大學 === 通訊工程所 === 98 === In this paper, we propose the use of AOSC-ANF to suppress the narrow-band interference (NBI) in modern communication systems, specifically, the direct sequence spread spectrum (DSSS) based systems. The spread spectrum system inherently provides resistance to the NBI by widening and suppressing the interference in the depressing process. When the interference is too strong to be suppressed by the given processing gain of the spread spectrum system, the bit error increases and the receiver no longer operate properly. Therefore, we detect and eliminate the narrow-band interference by AOSC-ANF at the receiver.
This paper aim at Binary Phase Shift Keying direct sequence spread spectrum system (BPSK-DSSS), and we use the Simulink tool to simulate the influence of the narrow-band interference on direct sequence spread spectrum system, and then use AOSC-ANF to eliminate the interference in order to reduce the influence of the narrow-band interference on transmission of the direct sequence spread spectrum system. Finally, we will discuss the influence of AOSC-ANF on direct sequence spread spectrum system when the narrow-band interference is weak or appear no narrow-band interference, and design a trigger mechanism to control whether it need to use AOSC-ANF to eliminate narrow-band interference or not.
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