TY - GEN
T1 - Deterministic pilot sequences for sparse channel estimation in OFDM systems
AU - Applebaum, Lorne
AU - Bajwa, Waheed U.
AU - Calderbank, A. Robert
AU - Haupt, Jarvis
AU - Nowak, Robert
PY - 2011
Y1 - 2011
N2 - This paper examines the problem of multipath channel estimation in single-antenna orthogonal frequency division multiplexing (OFDM) systems. In particular, we study the problem of pilot assisted channel estimation in wideband OFDM systems, where the time-domain (discrete) channel is approximately sparse. Existing works on this topic established that techniques from the compressed sensing literature can yield accurate channel estimates using a relatively small number of pilot tones, provided the pilots are selected randomly. Here, we describe a general purpose procedure for deterministic selection of pilot tones to be used for channel estimation, and establish guarantees for channel estimation accuracy using these sequences along with recovery techniques from the compressed sensing literature. Simulation results are presented to demonstrate the effectiveness of the proposed procedure in practice.
AB - This paper examines the problem of multipath channel estimation in single-antenna orthogonal frequency division multiplexing (OFDM) systems. In particular, we study the problem of pilot assisted channel estimation in wideband OFDM systems, where the time-domain (discrete) channel is approximately sparse. Existing works on this topic established that techniques from the compressed sensing literature can yield accurate channel estimates using a relatively small number of pilot tones, provided the pilots are selected randomly. Here, we describe a general purpose procedure for deterministic selection of pilot tones to be used for channel estimation, and establish guarantees for channel estimation accuracy using these sequences along with recovery techniques from the compressed sensing literature. Simulation results are presented to demonstrate the effectiveness of the proposed procedure in practice.
KW - Channel estimation
KW - OFDM systems
KW - compressed sensing
KW - deterministic RIP matrices
UR - http://www.scopus.com/inward/record.url?scp=80053136650&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053136650&partnerID=8YFLogxK
U2 - 10.1109/ICDSP.2011.6005024
DO - 10.1109/ICDSP.2011.6005024
M3 - Conference contribution
AN - SCOPUS:80053136650
SN - 9781457702747
T3 - 17th DSP 2011 International Conference on Digital Signal Processing, Proceedings
BT - 17th DSP 2011 International Conference on Digital Signal Processing, Proceedings
T2 - 17th International Conference on Digital Signal Processing, DSP 2011
Y2 - 6 July 2011 through 8 July 2011
ER -