Publication Type |
Journal Article |
School or College |
College of Engineering |
Department |
Electrical & Computer Engineering |
Creator |
Mathews, V. John |
Other Author |
Balasubramanian, Shankar; Farhang-Boroujeny, Behrouz |
Title |
Pilot embedding for channel estimation and tracking in OFDM systems |
Date |
2004 |
Description |
Abstract-We consider the problem of channel estimation and tracking in OFDM systems and explore the idea of adding pilot symbols to the data symbols as a means to conserve bandwidth. The term pilot embedding (PE) is used to refer to this scheme. Compared to the pilot insertion (PI) scheme, i.e., the conventional pilot symbol assisted modulation (PSAM), PE is more bandwidth efficient since no separate subcarriers/timeslots are allocated to pilots. We formalize this by evaluating the capacity of the two schemes and showing that PE indeed has the potential to transmit at a higher rate. The problem of channel tracking using a decision directed approach is reviewed and found to be unreliable, in the sense that the channel estimator fails to track the channel variations after some iterations because of unavoidable decision errors. We propose an ad hoc channel estimation algorithm that uses the embedded pilots along with the past decisions of data for reliable tracking of the channel. |
Type |
Text |
Publisher |
Institute of Electrical and Electronics Engineers (IEEE) |
Volume |
2 |
First Page |
1244 |
Last Page |
1248 |
Language |
eng |
Bibliographic Citation |
Balasubramanian, S., Farhang-Boroujeny, B., & Mathews, V. J. (2004). Pilot embedding for channel estimation and tracking in OFDM systems. Proc. IEEE Global Telecommunications Conference, 2, 1244-8. December. |
Rights Management |
(c) 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. |
Format Medium |
application/pdf |
Format Extent |
532,557 bytes |
Identifier |
ir-main,15177 |
ARK |
ark:/87278/s6s479gp |
Setname |
ir_uspace |
ID |
705563 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6s479gp |