Space-time spreading multilayered CDMA system
- 8 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 3, 1854-1858
- https://doi.org/10.1109/glocom.2000.891955
Abstract
As the information theory has suggested that deploying multiple transmit and receive antenna would bring about a huge capacity gain, future development is driven towards designing a system that would realize this gain in practice. Here, we consider the performance of a new space-time multilayered CDMA structure. The data stream is divided into layers, each of which is modulated with an unique space-time spreading sequence. At the receiver, the linear multiuser MMSE detector is used to recover all layers. Simulation results show that the capacity grows linearly with the number of transmit and receive antenna. We investigate the issue of selecting good space-time sequences to reduce co-interference from other layers. Results show that the joint space-time orthogonal codes exhibit good performance. The proposed structure also provides better immunity against signal loss, when any antenna element experiences failure.This publication has 6 references indexed in Scilit:
- Capacity of multi-antenna array systems in indoor wireless environmentPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Layered space-time architecture for wireless communication in a fading environment when using multi-element antennasBell Labs Technical Journal, 2002
- Combined array processing and space-time codingIEEE Transactions on Information Theory, 1999
- Space-time codes for high data rate wireless communication: performance criterion and code constructionIEEE Transactions on Information Theory, 1998
- On Limits of Wireless Communications in a Fading Environment when Using Multiple AntennasWireless Personal Communications, 1998
- Fading-resistant modulation using several transmitter antennasIEEE Transactions on Communications, 1997