TY - JOUR
T1 - Rate-Splitting Unifying SDMA, OMA, NOMA, and Multicasting in MISO Broadcast Channel
T2 - A Simple Two-User Rate Analysis
AU - Clerckx, Bruno
AU - Mao, Yijie
AU - Schober, Robert
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received September 20, 2019; accepted November 16, 2019. Date of publication November 20, 2019; date of current version March 9, 2020. This work was supported in part by Engineering and Physical Sciences Research Council (EPSRC) of the U.K. under Grant EP/N015312/1 and Grant EP/R511547/1, and in part by the U.S. National Science Foundation under Grant CCF-1908308. The associate editor coordinating the review of this article and approving it for publication was Y. Huang. (Corresponding author: Bruno Clerckx.) B. Clerckx and Y. Mao are with the Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, U.K. (e-mail: b.clerckx@imperial.ac.uk; y.mao16@imperial.ac.uk).
Publisher Copyright:
© 2012 IEEE.
PY - 2020/3
Y1 - 2020/3
N2 - Considering a two-user multi-antenna Broadcast Channel, this letter shows that linearly precoded Rate-Splitting (RS) with Successive Interference Cancellation (SIC) receivers is a flexible framework for non-orthogonal transmission that generalizes, and subsumes as special cases, four seemingly different strategies, namely Space Division Multiple Access (SDMA) based on linear precoding, Orthogonal Multiple Access (OMA), Non-Orthogonal Multiple Access (NOMA) based on linearly precoded superposition coding with SIC, and physical-layer multicasting. This letter studies the sum-rate and shows analytically how RS unifies, outperforms, and specializes to SDMA, OMA, NOMA, and multicasting as a function of the disparity of the channel strengths and the angle between the user channel directions.
AB - Considering a two-user multi-antenna Broadcast Channel, this letter shows that linearly precoded Rate-Splitting (RS) with Successive Interference Cancellation (SIC) receivers is a flexible framework for non-orthogonal transmission that generalizes, and subsumes as special cases, four seemingly different strategies, namely Space Division Multiple Access (SDMA) based on linear precoding, Orthogonal Multiple Access (OMA), Non-Orthogonal Multiple Access (NOMA) based on linearly precoded superposition coding with SIC, and physical-layer multicasting. This letter studies the sum-rate and shows analytically how RS unifies, outperforms, and specializes to SDMA, OMA, NOMA, and multicasting as a function of the disparity of the channel strengths and the angle between the user channel directions.
KW - NOMA
KW - OMA
KW - Rate-splitting
KW - SDMA
KW - multi-antenna broadcast channel
KW - multicasting
KW - rate analysis
UR - http://www.scopus.com/inward/record.url?scp=85081689255&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85081689255&partnerID=8YFLogxK
U2 - 10.1109/LWC.2019.2954518
DO - 10.1109/LWC.2019.2954518
M3 - Article
AN - SCOPUS:85081689255
SN - 2162-2337
VL - 9
SP - 349
EP - 353
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 3
M1 - 8907421
ER -