CDMA: principles of spread spectrum communication
CDMA: principles of spread spectrum communication
The impact of frequency-flat fading on the spectral efficiency of CDMA
IEEE Transactions on Information Theory
High performance wireless Ethernet
IEEE Communications Magazine
On the Capacity of Radio Communication Systems with Diversity in a Rayleigh Fading Environment
IEEE Journal on Selected Areas in Communications
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The design of 4th Generation Cellular Communication Systems will face manychallenges, including the need to achieve very high spectrum efficiency whencompared to 3rd Generation cellular systems. In this paper, we investigate thefundamental limits of DSSS-CDMA versus TDMA for achieving high spectrumefficiency by presenting the capacity regions for each including the effectsof multiple transmit and receive antennas. To assess the channel capacityregion for local area and wide area coverage, a channel model based uponuncorrelated Rayleigh fading and model with a strong spatial correlation andRicean component are evaluated. For multiple transmit and receive antennas,both open loop and closed loop capacity regions are assessed, where the closedloop capacity assumes channel state information at the transmitter and optimumpower allocation. Conclusions from the work include an assessment of whatapproaches hold the best promise for achieving high spectrum efficiency forfuture cellular communication systems.