A generalized transmit and receive diversity condition for feedback assisted MIMO systems:: theory & applications in full-duplex spatial modulation
A generalized transmit and receive diversity condition for feedback assisted MIMO systems:: theory & applications in full-duplex spatial modulation
It is widely exploited that the feedback assisted multiple-input multiple-output (MIMO) systems, which rely on channel state information (CSI) at the transmitter not only improve the spectral efficiency but also increase the attainable diversity gains. Owing to the limited bandwidth of the feedback channel, it is impractical to feed back perfect CSI or the transmit precoding (TPC) matrix to be used by the transmitter. This issue has been studied for over a decade now and it is addressed by feeding the TPC codeword index back to the transmitter. In this paper, we derive the conditions to be satisfied by the transmit and receive codebooks (TCBs and RCBs) for achieving full transmit and receive diversity gains. Furthermore, based on the conditions derived, we propose several RCBs by exploiting the properties of circulant matrices constructed with the aid of Cyclotomic polynomials. The proposed RCBs are shown to offer several benefits when employed in full-duplex (FD) spatial modulation (SM) systems, which include i) reduced hardware complexity of the self-interference (SI) cancellation circuitry ii) robustness to SI iii) maintain the diversity gain in the face of strong line-of-sight (LoS) channels. Furthermore, we study the performance of the proposed RCBs in an emerging drone communication scenario where several drones act as FD relays. Our simulation results show that the proposed RCBs indeed do attain the diversity gains predicted by our theoretical results. Specifically, in a dual-hop FD SM relay system the proposed receiver combiner selection (RCS) codebook is observed to give about 3dB signal-to-noise (SNR) gain compared to the receive antenna selection (RAS) codebook without any substantial extra requirements. In the case of a triple-hop FD drone network, an SNR gain of about 2.5dB is observed for our RCS codebook over a RAS codebook.
6505-6519
Mysore Rajashekar, Rakshith
d2fbbb04-57c5-4165-908f-600fc1fbdeab
Di Renzo, Marco
03e390ad-1c66-4303-bc3d-b366dba24759
Hari, K. V. S.
93c59427-eaf1-49f6-8943-d465d6366d43
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
15 December 2017
Mysore Rajashekar, Rakshith
d2fbbb04-57c5-4165-908f-600fc1fbdeab
Di Renzo, Marco
03e390ad-1c66-4303-bc3d-b366dba24759
Hari, K. V. S.
93c59427-eaf1-49f6-8943-d465d6366d43
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Mysore Rajashekar, Rakshith, Di Renzo, Marco, Hari, K. V. S. and Hanzo, Lajos
(2017)
A generalized transmit and receive diversity condition for feedback assisted MIMO systems:: theory & applications in full-duplex spatial modulation.
IEEE Transactions on Signal Processing, 65 (24), .
(doi:10.1109/TSP.2017.2757907).
Abstract
It is widely exploited that the feedback assisted multiple-input multiple-output (MIMO) systems, which rely on channel state information (CSI) at the transmitter not only improve the spectral efficiency but also increase the attainable diversity gains. Owing to the limited bandwidth of the feedback channel, it is impractical to feed back perfect CSI or the transmit precoding (TPC) matrix to be used by the transmitter. This issue has been studied for over a decade now and it is addressed by feeding the TPC codeword index back to the transmitter. In this paper, we derive the conditions to be satisfied by the transmit and receive codebooks (TCBs and RCBs) for achieving full transmit and receive diversity gains. Furthermore, based on the conditions derived, we propose several RCBs by exploiting the properties of circulant matrices constructed with the aid of Cyclotomic polynomials. The proposed RCBs are shown to offer several benefits when employed in full-duplex (FD) spatial modulation (SM) systems, which include i) reduced hardware complexity of the self-interference (SI) cancellation circuitry ii) robustness to SI iii) maintain the diversity gain in the face of strong line-of-sight (LoS) channels. Furthermore, we study the performance of the proposed RCBs in an emerging drone communication scenario where several drones act as FD relays. Our simulation results show that the proposed RCBs indeed do attain the diversity gains predicted by our theoretical results. Specifically, in a dual-hop FD SM relay system the proposed receiver combiner selection (RCS) codebook is observed to give about 3dB signal-to-noise (SNR) gain compared to the receive antenna selection (RAS) codebook without any substantial extra requirements. In the case of a triple-hop FD drone network, an SNR gain of about 2.5dB is observed for our RCS codebook over a RAS codebook.
Text
Full_duplex_SM_Drones
- Accepted Manuscript
More information
Accepted/In Press date: 16 September 2017
e-pub ahead of print date: 28 September 2017
Published date: 15 December 2017
Identifiers
Local EPrints ID: 414186
URI: http://eprints.soton.ac.uk/id/eprint/414186
ISSN: 1053-587X
PURE UUID: e5560d69-6d72-4f94-b226-47be0e059b12
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Date deposited: 18 Sep 2017 16:31
Last modified: 18 Mar 2024 02:35
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Contributors
Author:
Rakshith Mysore Rajashekar
Author:
Marco Di Renzo
Author:
K. V. S. Hari
Author:
Lajos Hanzo
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