Signal Canceller in the Carrier Super-positioning Satellite Networks

—To establish the interference canceller, generating replicas of unwanted carriers is a key. This paper addresses the design and performances of two types of signal canceller that are used for two typical types of satellite communications, namely P-MP VSAT (Point-to-Multi-Point Very Small-Aperture Terminal) and P-P (Point-to-Point) paired carrier systems. For P-MP VSAT, we show a simplified method where a replica of an unwanted carrier is generated by demodulating it. We have developed a reference simulator to simulate the behavior and performance. This simulator takes into account degradation due to implementation. The source code developed here is applicable to the implementation of FPGA. We also propose a method to generate replicas by stably measuring the satellite round-trip delay by multi-component code (MCC) on a real-time basis for P-P, since we cannot apply the same method to this case as we can for VSAT systems. We use MCC (Multi-component Code) to measure the delay as quic...

• Type: Journal
• Year: 2007
• Where: JCM
• Authors: Mayumi Osato, Hiroyuki Kobashi, Robert Y. Omaki, Takao Hara, Minoru Okada
• Keywords: JCM 2007, Multi-component Code, P-MP VSAT, Unwanted Carrier