📡JAXA | NEC and JAXA Co-Develop a Spread Spectrum Command Receiver for Commercial Communication Satellites
NEC Corporation (President and CEO: Takashi Niino, hereafter known as NEC) and JAXA (President: Hiroshi Yamakawa) co-developed a command receiver that employs a spread spectrum modulation method*1 for commercial satellites.
Compared with the Frequency Modulation and Phase Modulation methods conventionally used for commercial geosynchronous communication satellites, this new receiver has much higher immunity to electromagnetic interference and jamming, while maintaining the same levels of signal acquisition performance.
Recently, an increase of satellite launches makes orbits crowded and it generates electromagnetic interference with nearby satellites using the adjacent channel. It causes communication failures between satellite and ground station.
Solving this problem requires manually switching to other frequency channels, which results in more operational costs.