...广播信道下TDMA(time division multiple access)系统和CDMA(code division multiple access)系统的速率和容量(sum-rate capacity)进行了研究.在TDMA系统中,每一时刻基站只能向一个用户发送信号,而CDMA则可以同时向所有的用户发送信号.
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近年来，随着无线通信系统的容量和速率的提升，系统对RFIC的性能提出了更高的要求。
In recent years, with wireless communication capacity and promotion of speed of system, system's performance to RFIC put forward high request.
未来无线通信系统需要更高的数据传输速率和更好的服务质量，因此需要系统容量大幅度提高。
The future wireless communications system requires higher data transmission speed and better QoS, therefore the system capacity should be greatly improved.
为了获得足够的数据，必须保证在规定的时间内系统有足够的传输速率和存储容量。
So in order to get enough data during dead time, it request that a system must be of high-speed data transferring and a large mount of memory.
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