Pilot power ratio for uplink sum-rate maximization in zero-forcing based MU-MIMO systems with large number of antennas

Kyungsik Min, Minchae Jung, Taehyung Kim, Younsun Kim, Juho Lee, Sooyong Choi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper analyzes the pilot power ratio (PPR) in multiuser multiple-input multiple-output (MU-MIMO) systems with a large number of receive antennas (M) at the base station (BS). We consider zero-forcing based MU-MIMO orthogonal frequency division multiplexing (OFDM) systems. Based on the deterministic uplink sum-rate approximation for imperfect channel state information, we can formulate the optimization problems in terms of the PPR to maximize the ergodic uplink sum-rate subject to the per-slot or per-symbol power constraint. Under the per-slot power constraint, the optimal PPR can be obtained in a closed form while under the per-symbol power constraint, we propose an iterative algorithm which generates a suboptimal PPR. Simulation results show that the proposed PPRs perform close to the optimal performance in terms of the sum-rate. Also, it is shown that the proposed PPRs outperform the equal power allocation. In particular, in the ZF-R based MU-MIMO OFDM system with 8 users and M = 32 under the per-slot power constraint, the proposed PPR can achieve about 8bps/Hz performance gain compared to the equal power allocation.

Original languageEnglish
Title of host publication2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013
DOIs
Publication statusPublished - 2013 Dec 1
Event2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013 - Las Vegas, NV, United States
Duration: 2013 Sep 22013 Sep 5

Other

Other2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013
CountryUnited States
CityLas Vegas, NV
Period13/9/213/9/5

Fingerprint

Zero-forcing
Multiple-input multiple-output (MIMO) Systems
Uplink
Orthogonal frequency division multiplexing
Antenna
Antennas
Channel state information
Base stations
Power Allocation
Orthogonal Frequency Division multiplexing (OFDM)
Multiple-input multiple-output (MIMO)
Channel State Information
Imperfect
Iterative Algorithm
Closed-form
Maximise
Optimization Problem
Approximation
Simulation

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Min, K., Jung, M., Kim, T., Kim, Y., Lee, J., & Choi, S. (2013). Pilot power ratio for uplink sum-rate maximization in zero-forcing based MU-MIMO systems with large number of antennas. In 2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013 [6692364] https://doi.org/10.1109/VTCFall.2013.6692364
Min, Kyungsik ; Jung, Minchae ; Kim, Taehyung ; Kim, Younsun ; Lee, Juho ; Choi, Sooyong. / Pilot power ratio for uplink sum-rate maximization in zero-forcing based MU-MIMO systems with large number of antennas. 2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013. 2013.
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Min, K, Jung, M, Kim, T, Kim, Y, Lee, J & Choi, S 2013, Pilot power ratio for uplink sum-rate maximization in zero-forcing based MU-MIMO systems with large number of antennas. in 2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013., 6692364, 2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013, Las Vegas, NV, United States, 13/9/2. https://doi.org/10.1109/VTCFall.2013.6692364

Pilot power ratio for uplink sum-rate maximization in zero-forcing based MU-MIMO systems with large number of antennas. / Min, Kyungsik; Jung, Minchae; Kim, Taehyung; Kim, Younsun; Lee, Juho; Choi, Sooyong.

2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013. 2013. 6692364.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Min K, Jung M, Kim T, Kim Y, Lee J, Choi S. Pilot power ratio for uplink sum-rate maximization in zero-forcing based MU-MIMO systems with large number of antennas. In 2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013. 2013. 6692364 https://doi.org/10.1109/VTCFall.2013.6692364