Generating orthogonal code with variable spreading factor enables code words to be generated with very low circuit costs - involves computing computation index, storing as binary word, computing computation index data word width, exchanging significant data bits, logic processing

摘要

The method involves generating code words from code tree index data, whereby one data item represents the code spreading factor and another the code position for a code with the same spreading factor within the code tree. A computation index is computed depending on the second data item and temporarily stored as a binary data word. The width of the computation index data word is computed and its significant data bits are exchanged bit by bit to form the computation base, which is logically combined with a variable to form a combination data word, which is logically reduced to form the OVSF code word.