Novel feedback bit allocation methods for multi-cell joint processing systems

Seungpyo Yu, Han Bae Kong, Young Tae Kim, Seok Hwan Park, Inkyu Lee

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this letter, we study multiple-input single-output joint processing (JP) systems with limited feedback where base stations exchange both channel state information and their data via ideal backhaul links. In order to optimize the sum-rate performance of the JP system, we propose a new feedback bit allocation scheme which maximizes quantization accuracy in the presence of pathloss. The quantization accuracy is formulated by the expectation of the inner product between the actual channel vector and the quantized channel vector. First, we derive the quantization accuracy as a closed form, which compensates the phase difference of two channels. Then, the maximum quantization accuracy is achieved by searching possible bit combinations. Simulation results show that the sum rate of our proposed feedback bit allocation strategy is more than twice compared to the conventional equal bit allocation method in the three cell case.

Original languageEnglish
Article number6226314
Pages (from-to)3030-3036
Number of pages7
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number9
DOIs
Publication statusPublished - 2012 Jul 3

Fingerprint

Bit Allocation
Quantization
Feedback
Cell
Processing
Limited Feedback
Path Loss
Phase Difference
Channel state information
Channel State Information
Scalar, inner or dot product
Base stations
Closed-form
Maximise
Optimise
Output
Simulation

Keywords

  • limited feedback
  • Multicell
  • multiple antennas

ASJC Scopus subject areas

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

Cite this

Novel feedback bit allocation methods for multi-cell joint processing systems. / Yu, Seungpyo; Kong, Han Bae; Kim, Young Tae; Park, Seok Hwan; Lee, Inkyu.

In: IEEE Transactions on Wireless Communications, Vol. 11, No. 9, 6226314, 03.07.2012, p. 3030-3036.

Research output: Contribution to journalArticle

Yu, Seungpyo ; Kong, Han Bae ; Kim, Young Tae ; Park, Seok Hwan ; Lee, Inkyu. / Novel feedback bit allocation methods for multi-cell joint processing systems. In: IEEE Transactions on Wireless Communications. 2012 ; Vol. 11, No. 9. pp. 3030-3036.
@article{f4482f4a9dc04c07b5934bec702c7494,
title = "Novel feedback bit allocation methods for multi-cell joint processing systems",
abstract = "In this letter, we study multiple-input single-output joint processing (JP) systems with limited feedback where base stations exchange both channel state information and their data via ideal backhaul links. In order to optimize the sum-rate performance of the JP system, we propose a new feedback bit allocation scheme which maximizes quantization accuracy in the presence of pathloss. The quantization accuracy is formulated by the expectation of the inner product between the actual channel vector and the quantized channel vector. First, we derive the quantization accuracy as a closed form, which compensates the phase difference of two channels. Then, the maximum quantization accuracy is achieved by searching possible bit combinations. Simulation results show that the sum rate of our proposed feedback bit allocation strategy is more than twice compared to the conventional equal bit allocation method in the three cell case.",
keywords = "limited feedback, Multicell, multiple antennas",
author = "Seungpyo Yu and Kong, {Han Bae} and Kim, {Young Tae} and Park, {Seok Hwan} and Inkyu Lee",
year = "2012",
month = "7",
day = "3",
doi = "10.1109/TWC.2012.062012.111169",
language = "English",
volume = "11",
pages = "3030--3036",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "9",

}

TY - JOUR

T1 - Novel feedback bit allocation methods for multi-cell joint processing systems

AU - Yu, Seungpyo

AU - Kong, Han Bae

AU - Kim, Young Tae

AU - Park, Seok Hwan

AU - Lee, Inkyu

PY - 2012/7/3

Y1 - 2012/7/3

N2 - In this letter, we study multiple-input single-output joint processing (JP) systems with limited feedback where base stations exchange both channel state information and their data via ideal backhaul links. In order to optimize the sum-rate performance of the JP system, we propose a new feedback bit allocation scheme which maximizes quantization accuracy in the presence of pathloss. The quantization accuracy is formulated by the expectation of the inner product between the actual channel vector and the quantized channel vector. First, we derive the quantization accuracy as a closed form, which compensates the phase difference of two channels. Then, the maximum quantization accuracy is achieved by searching possible bit combinations. Simulation results show that the sum rate of our proposed feedback bit allocation strategy is more than twice compared to the conventional equal bit allocation method in the three cell case.

AB - In this letter, we study multiple-input single-output joint processing (JP) systems with limited feedback where base stations exchange both channel state information and their data via ideal backhaul links. In order to optimize the sum-rate performance of the JP system, we propose a new feedback bit allocation scheme which maximizes quantization accuracy in the presence of pathloss. The quantization accuracy is formulated by the expectation of the inner product between the actual channel vector and the quantized channel vector. First, we derive the quantization accuracy as a closed form, which compensates the phase difference of two channels. Then, the maximum quantization accuracy is achieved by searching possible bit combinations. Simulation results show that the sum rate of our proposed feedback bit allocation strategy is more than twice compared to the conventional equal bit allocation method in the three cell case.

KW - limited feedback

KW - Multicell

KW - multiple antennas

UR - http://www.scopus.com/inward/record.url?scp=84866740316&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866740316&partnerID=8YFLogxK

U2 - 10.1109/TWC.2012.062012.111169

DO - 10.1109/TWC.2012.062012.111169

M3 - Article

AN - SCOPUS:84866740316

VL - 11

SP - 3030

EP - 3036

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 9

M1 - 6226314

ER -