A system for publishing data on shared broadcast channels using spread-spectrum techniques, which may comprise a spread-spectrum encoder capable of receiving data and placing it in a spread-spectrum signal format and a transmitter operating on a shared communication channel or frequency band, such as...http://www.google.com.hk/patents/US6118824?utm_source=gb-gplus-share專利 US6118824 - Spread-spectrum data publishing system
