Superimposed or time-division multiplexed pilots in time-varying channels: an informative consideration

Authors:
Wang Xin;Youzheng Wang;Jianhua Lu
Affiliations:
Tsinghua University, Beijing, P. R. China;Tsinghua University, Beijing, P. R. China;Tsinghua University, Beijing, P. R. China
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

Citing 3
Cited 0

Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing

Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing
On Superimposed Training for MIMO Channel Estimation and Symbol Detection

IEEE Transactions on Signal Processing
Optimal insertion of pilot symbols for transmissions over time-varying flat fading channels

IEEE Transactions on Signal Processing

Quantified Score

Hi-index	0.00

Visualization

Abstract

Two major techniques are used to embed pilots into data, time-division multiplexed (TDM) and superimposed (SIP). In this paper, we compare these two techniques in an informative consideration under time varying fading channels. Besides the ordinary SIP without dealing with the interference, we also study two different kinds of performance improved iterative SIP: interference subtraction (IS) and interference exploitation (IE). Using Wiener filtering and accounting estimation error, the capacity lower bounds and BER expressions are derived. Numerical results show that great potential benefits are brought by SIP if the interference is utilized properly. With this potential exploited, SIP shows great superior to PSAM, especially in high speed environments.