TY - JOUR
T1 - Rethinking Modulation and Detection for High Doppler Channels
AU - Dean, Thomas R.
AU - Chowdhury, Mainak
AU - Grimwood, Nicole
AU - Goldsmith, Andrea J.
N1 - Funding Information:
Manuscript received November 6, 2018; revised April 30, 2019, August 18, 2019, and December 22, 2019; accepted January 1, 2020. Date of publication January 22, 2020; date of current version June 10, 2020. This work was supported in part by the 2017 IEEE PIMRC, Montréal, Canada, and in part by the NSF Center for Science of Information under Grant CCF-0939370. The work of Thomas R. Dean was supported by the Fannie and John Hertz Foundation. The associate editor coordinating the review of this article and approving it for publication was I. Guvenc. (Corresponding author: Thomas R. Dean.) The authors are with the Department of Electrical Engineering, Stanford University, Stanford, CA 94305 USA (e-mail: trdean@stanford.edu; mainakch@stanford.edu; grimwood@alumni.stanford.edu; andrea@ ee.stanford.edu).
Publisher Copyright:
© 2002-2012 IEEE.
PY - 2020/6
Y1 - 2020/6
N2 - We present two modulation and detection techniques that are designed to allow for efficient equalization for channels that exhibit an arbitrary Doppler spread but no delay spread. These techniques are based on principles similar to techniques designed for time-invariant delay spread channels (e.g., Orthogonal Frequency Division Multiplexing or OFDM) and have the same computational complexity. Through numerical simulations, we show that effective equalization is possible for channels that exhibit a high Doppler spread and even a modest delay spread, whereas equalized OFDM exhibits a strictly worse performance in these environments. Our results indicate that, in rapidly time-varying channels, such as those found in high-mobility or mmWave deployments, new modulation coupled with appropriate channel estimation and equalization techniques may significantly outperform modulation and detection schemes that are designed for static or slowly time varying multipath channels.
AB - We present two modulation and detection techniques that are designed to allow for efficient equalization for channels that exhibit an arbitrary Doppler spread but no delay spread. These techniques are based on principles similar to techniques designed for time-invariant delay spread channels (e.g., Orthogonal Frequency Division Multiplexing or OFDM) and have the same computational complexity. Through numerical simulations, we show that effective equalization is possible for channels that exhibit a high Doppler spread and even a modest delay spread, whereas equalized OFDM exhibits a strictly worse performance in these environments. Our results indicate that, in rapidly time-varying channels, such as those found in high-mobility or mmWave deployments, new modulation coupled with appropriate channel estimation and equalization techniques may significantly outperform modulation and detection schemes that are designed for static or slowly time varying multipath channels.
KW - 5G Mobile communication
KW - mmWave
KW - multipath channels
KW - time-varying channels
UR - http://www.scopus.com/inward/record.url?scp=85088149693&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85088149693&partnerID=8YFLogxK
U2 - 10.1109/TWC.2020.2967039
DO - 10.1109/TWC.2020.2967039
M3 - Article
AN - SCOPUS:85088149693
SN - 1536-1276
VL - 19
SP - 3629
EP - 3642
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 6
M1 - 8966621
ER -