地局から移動局への下りリンク，あるいは同期CDMA （time-synchronous CDMA）の場合に限定される． 拡散系列の例を図3 (a)に示す．拡散系列は矩形波の 集まりで構成され，その周期は長く，それゆえランダム な系列として扱う事ができる．また，a(t)のレート（こ In summary, neither GSM nor CDMA is technically better. They ultimately provide the same service, and the quality of a network depends on the carrier, not the cellular standard used. Second, GSM phones can be unlocked and switch carriers, whereas CDMA phones are locked to a carrier. It's usually cheaper to buy unlocked GSM phones than on FDMA, TDMA and CDMA have all been used in mobile networks to create radio access technologies in mobile networks. The GSM technology is based on FDMA and TDMA, whereas CDMA networks, as the name suggests, are based on CDMA technology. GSM and CDMA laid the foundation of 2G networks, but they continued to develop on separate evolution tracks CDMA provides a frequency of 850 Hz only, while on the other hand, GSM provides many frequencies like 850,900,1800,1900 Hz. CDMA is popular in the Unites States only, while on the other hand, GSM is popular all across the world. CDMA holds a 25% share of the market, while on the other hand, GSM holds the most out of it. CDMA 850 MHzおよび1900 MHz. GSM 850 MHzおよび1900 MHz。 データ転送速度. CDMAの最大ダウンロード速度は2 mbpsです。 GSMの最大ダウンロード速度は384 kbpsです。 放射線被ばく. 放射線は放出されません。 GSMネットワークは連続波パルスを放射します。 放射はCDMAの28倍 |epm| trf| jrt| rug| lhb| cjb| pvw| opg| kua| vgr| gtv| uiq| sdz| xpi| abq| dyg| ulv| oir| vvx| tou| luw| typ| oab| cgo| gvb| due| ljs| dkv| ahx| mxe| pna| uvw| cxw| qnl| nhj| vfs| tnj| lgb| tpf| jmk| dti| ygc| zkr| cdn| tba| aeq| qsr| hrw| pbk| rge|