The Definitive Guide to Dual-mode Handsets
The Definitive Guide to Dual-mode Handsets
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系统容量 ：在保证通信质量的前提下，功率控制算法能够支持的用户数量和数据传输速率。
Evolution Data Only (EVDO) engineering has many use situations, generally resulting from its power to offer substantial-speed data transmission over cellular networks. A number of the prominent use instances for EVDO provided:
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It’s much more than just a logistical preference; it’s a strategic choice that boosts negotiation energy, provider wide variety, and customer satisfaction.
The Walsh Area not devoted to broadcast channels within the BTS sector is available for website traffic channels. These channels carry the individual voice and data calls supported by IS-95. Similar CDMA2000 to the paging channel, site visitors channels Possess a frame time of 20ms.
CDMA technologies enables multiple consumers to share the identical frequency band concurrently by assigning a unique website code (or channelization code) to every user. This code distinguishes 1 person's data from A different's on the exact same frequency.
Гибкое распределение ресурсов. При кодовом разделении нет строгого ограничения на число каналов. С увеличением числа абонентов постепенно возрастает вероятность ошибок декодирования, что ведёт к снижению качества канала, но не к отказу обслуживания.
Varieties of Multiplexing in Data Communications Imagine you might have several close friends who all want to ship letters to the same individual simultaneously.
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速率分配： 根据调度结果和用户信道条件动态地分配每个用户的数据速率。
Spread Spectrum more info and CDMA: EVDO employs spread spectrum techniques, meaning it spreads the data signal over a wide array of frequencies.
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频谱利用率高： 多载波技术可以更有效地使用有限的频谱资源，提高频谱利用率。