S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Others_전기·정보공학부
Channel Probing in the Uplink of OFDM-based Wireless Systems
- Lee, Seung-Hwan; Lee, Yong-Hwan
- Issue Date
- 2007 IEEE Sarnoff Symposium
- In this paper, we consider a new channel probing
scheme for opportunistic scheduling in the uplink of orthogonal
frequency division multiplexing (OFDM)-based wireless systems.
To reduce signaling overhead for the probing, we consider a twostep
channel probing process; called pre-probing and mainprobing.
Good subchannels are first estimated through the preprobing
process using a probing signal transmitted through
subcarriers spread out the whole bandwidth. Then, by sending a
main-probing signal over only good subchannels, the proposed
scheme can significantly reduce the probing signaling overhead
without noticeable performance degradation compared to the full
probing scheme. Finally, the performance of the proposed scheme
is verified by computer simulation.
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