A nullspace-based precoder with subspace expansion for radar/communications coexistence

Alireza Babaei, William H. Tranter, Tamal Bose

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

19 Citations (Scopus)

Abstract

In this paper we consider spectrum sharing between a communication system, modeled as MIMO interference channel (MIMO IFC), and MIMO radar. We first derive a zero-forcing precoder to eliminate the interference at the communication receivers. We show that this precoder is equivalent to orthogonal projection matrix onto the null space of an effective interference channel and show that this choice of precoder will degrade the radar target direction estimation performance. We show that the radar performance can be improved at the cost of non-zero interference at communication users by projecting the radar signal onto a subspace which is an expanded version of the aforementioned null space. We propose two approaches to smoothly expand the projected subspace and study the tradeoff between radar performance and interference at the communication users through simulation.

Original languageEnglish (US)
Title of host publicationGLOBECOM - IEEE Global Telecommunications Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3487-3492
Number of pages6
ISBN (Print)9781479913534
DOIs
StatePublished - 2013
Event2013 IEEE Global Communications Conference, GLOBECOM 2013 - Atlanta, GA, United States
Duration: Dec 9 2013Dec 13 2013

Other

Other2013 IEEE Global Communications Conference, GLOBECOM 2013
CountryUnited States
CityAtlanta, GA
Period12/9/1312/13/13

Fingerprint

Radar
Communication
MIMO radar
MIMO systems
Communication systems

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Babaei, A., Tranter, W. H., & Bose, T. (2013). A nullspace-based precoder with subspace expansion for radar/communications coexistence. In GLOBECOM - IEEE Global Telecommunications Conference (pp. 3487-3492). [6831613] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GLOCOM.2013.6831613

A nullspace-based precoder with subspace expansion for radar/communications coexistence. / Babaei, Alireza; Tranter, William H.; Bose, Tamal.

GLOBECOM - IEEE Global Telecommunications Conference. Institute of Electrical and Electronics Engineers Inc., 2013. p. 3487-3492 6831613.

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

Babaei, A, Tranter, WH & Bose, T 2013, A nullspace-based precoder with subspace expansion for radar/communications coexistence. in GLOBECOM - IEEE Global Telecommunications Conference., 6831613, Institute of Electrical and Electronics Engineers Inc., pp. 3487-3492, 2013 IEEE Global Communications Conference, GLOBECOM 2013, Atlanta, GA, United States, 12/9/13. https://doi.org/10.1109/GLOCOM.2013.6831613
Babaei A, Tranter WH, Bose T. A nullspace-based precoder with subspace expansion for radar/communications coexistence. In GLOBECOM - IEEE Global Telecommunications Conference. Institute of Electrical and Electronics Engineers Inc. 2013. p. 3487-3492. 6831613 https://doi.org/10.1109/GLOCOM.2013.6831613
Babaei, Alireza ; Tranter, William H. ; Bose, Tamal. / A nullspace-based precoder with subspace expansion for radar/communications coexistence. GLOBECOM - IEEE Global Telecommunications Conference. Institute of Electrical and Electronics Engineers Inc., 2013. pp. 3487-3492
@inproceedings{6d7fe5846a034e4293461e4d097870d0,
title = "A nullspace-based precoder with subspace expansion for radar/communications coexistence",
abstract = "In this paper we consider spectrum sharing between a communication system, modeled as MIMO interference channel (MIMO IFC), and MIMO radar. We first derive a zero-forcing precoder to eliminate the interference at the communication receivers. We show that this precoder is equivalent to orthogonal projection matrix onto the null space of an effective interference channel and show that this choice of precoder will degrade the radar target direction estimation performance. We show that the radar performance can be improved at the cost of non-zero interference at communication users by projecting the radar signal onto a subspace which is an expanded version of the aforementioned null space. We propose two approaches to smoothly expand the projected subspace and study the tradeoff between radar performance and interference at the communication users through simulation.",
author = "Alireza Babaei and Tranter, {William H.} and Tamal Bose",
year = "2013",
doi = "10.1109/GLOCOM.2013.6831613",
language = "English (US)",
isbn = "9781479913534",
pages = "3487--3492",
booktitle = "GLOBECOM - IEEE Global Telecommunications Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TY - GEN

T1 - A nullspace-based precoder with subspace expansion for radar/communications coexistence

AU - Babaei, Alireza

AU - Tranter, William H.

AU - Bose, Tamal

PY - 2013

Y1 - 2013

N2 - In this paper we consider spectrum sharing between a communication system, modeled as MIMO interference channel (MIMO IFC), and MIMO radar. We first derive a zero-forcing precoder to eliminate the interference at the communication receivers. We show that this precoder is equivalent to orthogonal projection matrix onto the null space of an effective interference channel and show that this choice of precoder will degrade the radar target direction estimation performance. We show that the radar performance can be improved at the cost of non-zero interference at communication users by projecting the radar signal onto a subspace which is an expanded version of the aforementioned null space. We propose two approaches to smoothly expand the projected subspace and study the tradeoff between radar performance and interference at the communication users through simulation.

AB - In this paper we consider spectrum sharing between a communication system, modeled as MIMO interference channel (MIMO IFC), and MIMO radar. We first derive a zero-forcing precoder to eliminate the interference at the communication receivers. We show that this precoder is equivalent to orthogonal projection matrix onto the null space of an effective interference channel and show that this choice of precoder will degrade the radar target direction estimation performance. We show that the radar performance can be improved at the cost of non-zero interference at communication users by projecting the radar signal onto a subspace which is an expanded version of the aforementioned null space. We propose two approaches to smoothly expand the projected subspace and study the tradeoff between radar performance and interference at the communication users through simulation.

UR - http://www.scopus.com/inward/record.url?scp=84904116579&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84904116579&partnerID=8YFLogxK

U2 - 10.1109/GLOCOM.2013.6831613

DO - 10.1109/GLOCOM.2013.6831613

M3 - Conference contribution

AN - SCOPUS:84904116579

SN - 9781479913534

SP - 3487

EP - 3492

BT - GLOBECOM - IEEE Global Telecommunications Conference

PB - Institute of Electrical and Electronics Engineers Inc.

ER -