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前言 语音仍然是第三代移动通信系统中最重要的业务之一,问题在于:如何在优化频谱资源的同时增强灵活性和语音质量,尤其是在用户密集的区域。一个好的解决厅案必须能够在无噪信道条件下提供最好的质量,而且能够在
Preface Voice is still one of the most important services in 3G mobile systems. The question is how to optimize the spectrum resources while enhancing the flexibility and voice quality, especially in user-intensive areas. A good solution hall must be able to provide the best quality in a noiseless channel,