通信工程专业英语论文翻译内容摘要：
and forty times efficient than analog systems. CDMA also have better security and higher data and voice transmission quality because of the spread spectrum technology it uses, which has increased resistance to multipath distortion. The battery life is higher in TDMA pared to CDMA because CDMA handsets transmit data all the time and TDMA does not require constant transmission. CDMA has greater coverage area when pared to TDMA. Though, when it es to international roaming TDMA is better than CDMA. CDMA is patented by Qualm, so an extra fee is paid to Qualm. When it es to United States and Canada market size for CDMA is larger than GSM’s market size but worldwide the market size for GSM is far bigger both in the number of subscribers and coverage ,than CDMA. Conclusion: From the parisons made above we cannot say that TDMA is better than CDMA or vice versa. The main advantage of the CDMA is that, in the single detection method it is more flexible than TDMA or joint detection. CDMA is。阅读剩余 0%
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