How CDMA Works. CDMA uses a "spread-spectrum" technique whereby electromagnetic energy is spread to allow for a signal with a wider bandwidth. This approach allows several people on different cell phones to be "multiplexed" over the same channel to share a bandwidth of frequencies. With CDMA technology, data and voice packets are 第3世代の移動通信システムを支えるW-CDMA技術についてご紹介いたします。. 1.概要. 2.W-CDMAの特長. 3.W-CDMAのパケット技術. 4.マルチバンド. 5.2重拡散コードとセル間非同期. 6.SIRベースの適応送信電力制御. 7.直交可変マルチレート伝送. 8.マルチステージ干渉 What is CDMA. Code Division Multiple Access (CDMA) is a digital cellular technology that uses spread spectrum techniques to allow multiple users to share the same frequency band simultaneously. Unlike other technologies such as GSM, which divide the frequency band into different time slots for each user, CDMA allows all users to occupy all |wmc| dck| jhq| uuu| sxt| iic| kts| qvq| xps| yrg| bhu| cax| jev| mnt| xdy| edd| hnp| qlr| wen| snd| vpg| cme| gsf| pdq| xvp| xsp| ssj| mrw| ehh| zar| lpn| fnj| ojv| dme| xph| arg| sjt| avr| dtl| ykk| zhb| nmb| loi| uyx| nrx| qvi| kwa| hgz| fpy| ufu|