混合噪声环境下的CDMA抗多址干扰性能

CDMA anti-MAI performance in a mixed noise environment

研究了预去相关及线性单用户检测抗多址干扰技术.由于线性单用户检测抗多址干扰CDMA接收机的解调序列不等同于特征序列本身,考虑到移动通信环境中载波相位的跟踪和估计有时很困难,提出了在混合噪声环境下,差分相干同步CDMA信道中的线性单用户检测抗多址干扰技术的系统结构、算法及特性.提出变革传统CDMA结构及算法的方法,使得系统具有抗多址干扰能力,从而使系统的容量极大化.

The technology of pre-decorrelation and linear single-user detection anti-MAI were introduced. Because the demodulation sequence of the linear single-user detection anti-MAI CDMA receiver differs from the characteristic sequence itself, considering that it is hard to trace and estimate the carrier phase in the mixed noise environment, this paper provides the system structure, algorithm and features of the linear single-user detection anti-MAI technology in the differentially coherent synchronous CDMA channel. The author introduced a method that transforms the traditional CDMA structure and algorithm, to equip the system with anti-MAI capability. Thus, the system capacity can be maximized.