多载波信号的峰值平均功率比远远大于单载波系统，而且峰平比随着子载波个数无限增长。
The ratio of peak and average power in multi carrier system is much larger than that in single carrier system, and may grow unboundedly as the number of subcarriers grows to infinity.
多调制源、多载波信号的循环自相关解调分析存在交叉项的干扰，这使循环自相关解调方法的实际应用产生了困难。
The cross-term interference caused by multi-modulator and multi-carrier makes it difficult the use of the cyclic autocorrelation demodulation.
通过在阵列天线多载波ds - CD MA系统下构造统一的信号模型，实现了基于子空间的信道盲估计。
By unified signal model of antenna array Multicarrier DS-CDMA system, the subspace-based blind channel estimation is achieved.
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