提出了一种可以在多径环境下消除CDMA多址干扰的新扩频方案。在同步发射条件下 ,该方法在多径环境下保持了多用户码的正交性 ,因此完全消除了多址干扰。而各自用户的信息符号可通过解方程的方法从多径叠加信号中分离得到。仿真结果表明该方法可以在保持系统信息吞吐量不变的条件下 ,降低误码率。另外 ,还对带宽效率进行了讨论。 A new spread spectrum scheme that can eliminate CDMA multiple access interference in multi-path environment is proposed. Under the conditions of simultaneous transmission, this method maintains the orthogonality of multi-user codes in multi-path environment, thus completely eliminating multiple access interference. The information symbols of the respective users can be separated from the multipath superimposed signals by solving the equations. The simulation results show that this method can reduce the error rate under the condition of keeping the throughput of system information unchanged. In addition, the bandwidth efficiency is also discussed.