Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs, and reduces the required transmission bandwidth b...Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs, and reduces the required transmission bandwidth by up to 80%. In addition you get improved voice quality and better QoS.展开更多
Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs,
Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs,
This article is about orthogonal frequency-division multiplexing with quadrature amplitude modulation combined with code division multiplexing access for complex data transmission. It aims to present a method which us...This article is about orthogonal frequency-division multiplexing with quadrature amplitude modulation combined with code division multiplexing access for complex data transmission. It aims to present a method which uses two interfering subsets in order to improve the performance of the transmission scheme. The idea is to spread in a coherent manner some data amongst two different codes belonging to the two different subsets involved in complex orthogonal frequency-division multiplexing with quadrature amplitude modulation and code division multiplexing access. This will improve the useful signal level at the receiving side and therefore improve the decoding process especially at low signal to noise ratio. However, this procedure implies some interference with other codes therefore creating a certain noise which is noticeable at high signal to noise ratio.展开更多
文摘Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs, and reduces the required transmission bandwidth by up to 80%. In addition you get improved voice quality and better QoS.
文摘Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs,
文摘Our new All-IP CDMA2000 solution is the first IOS V5.0-based system to be launched commercially. This evolutionary system gives you up to 30% savings on vocoder costs,
文摘This article is about orthogonal frequency-division multiplexing with quadrature amplitude modulation combined with code division multiplexing access for complex data transmission. It aims to present a method which uses two interfering subsets in order to improve the performance of the transmission scheme. The idea is to spread in a coherent manner some data amongst two different codes belonging to the two different subsets involved in complex orthogonal frequency-division multiplexing with quadrature amplitude modulation and code division multiplexing access. This will improve the useful signal level at the receiving side and therefore improve the decoding process especially at low signal to noise ratio. However, this procedure implies some interference with other codes therefore creating a certain noise which is noticeable at high signal to noise ratio.
