Embodiments of the present invention provide a fast, software-implemented data scrambling system for data communications. For pseudo-random codes that are periodic within a predetermined number of bits, a memory array may be populated with segments of the code, one entry in the array starting at a unique...http://www.google.com.hk/patents/US7412057?utm_source=gb-gplus-share專利 US7412057 - Fast-software-implemented pseudo-random code generator
