Study on coding and modulation of the M-ary orthogonal spread spectrum system
Ying Yan · Jounal of Xidian University · 2001
Based on the fundamental theory of the M-ary orthogonal spread spectrum system, a principle for the generation and selection of the orthogonal spread spectrum code is suggested. A new method that is suitable for the environment of high-speed packet radio networks and results in faster synchronization acquisition and higher bit rates is proposed, in which a synchronization logic channel is added while the information is transmitted. An experimental system with the Walsh function and m-ary series spread spectrum coding decoding is developed for QTPK modulation demodulation, and experimental results show that the method is effective.