On transmit diversity and scheduling in wireless packet data
- 13 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 8, 2433-2437
- https://doi.org/10.1109/icc.2001.936580
Abstract
Downlink time division multiplexing is considered for cellular packet-switched systems, in conjunction with scheduling algorithms for fast packet switching across the served users. Additionally, open and closed loop transmit diversity techniques at the base station are considered to improve the spectral efficiency of the resulting system. A study is conducted on the effect of candidate transmit diversity techniques for packet data systems on the overall network data throughput in the presence of scheduling. Contrary to the circuit-switching paradigm, the presented results highlight the conflicting objectives of specific transmit diversity schemes and efficient scheduling and illustrate the impact of the medium access control layer functions on the physical layer performance. The open loop space time spreading technique is shown to offer inferior performance to no transmit diversity under greedy packet scheduling. An appropriate transmit diversity scheme is proposed for the downlink packet-data multiple access.Keywords
This publication has 6 references indexed in Scilit:
- Data throughput of CDMA-HDR a high efficiency-high data rate personal communication wireless systemPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Downlink scheduling in CDMA data networksPublished by Association for Computing Machinery (ACM) ,2000
- CDMA/HDR: a bandwidth efficient high speed wireless data service for nomadic usersIEEE Communications Magazine, 2000
- Design and Implementation of a Low Complexity VLSI Turbo-Code Decoder Architecture for Low Energy Mobile Wireless CommunicationsJournal of Signal Processing Systems, 2000
- Multiaccess fading channels. I. Polymatroid structure, optimal resource allocation and throughput capacitiesIEEE Transactions on Information Theory, 1998
- A simple transmit diversity technique for wireless communicationsIEEE Journal on Selected Areas in Communications, 1998