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发帖数: 14 | 1 贡献一篇给想买手机的朋友吧
CDMA is also known as spread spectrum technology because it
uses a low-power signal that is "spread" across a wide
bandwidth. With CDMA, a phone call is assigned a code, which
identifies it to the correct receiving phone. Using the
identifying code and a low-power signal, a large number of
calls can be carried simultaneously on the same group of
channels. TDMA is a digital air interface technology
designed to increase the channel capacity by chopping the
signal into pieces and assi |
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