Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/584820
Title: A Novel Differential Detection for Differential OFDM Systems With High Mobility
Authors: Liang Zhang;Zhihong Hong;Yiyan Wu;Richard Boudreau;Louis Thibault
subject: OFDM|decision directed|DAB|fast fading|differential detection|Digital audio broadcasting
Year: 2016
Publisher: IEEE
Abstract: In conventional differential detection (CDD), the previous received symbol is used as the phase reference for the current received symbol, therefore the channel variation due to fast fading causes an error floor. We propose a novel iterative decision-directed differential detection (iD4) algorithm for orthogonal frequency division multiplexing (OFDM) systems employing differential PSK modulation in each subcarrier. The core of iD4 is a low complexity time and frequency 2-D estimator which can effectively estimate the channel variation experienced by adjacent time domain symbols. This estimated channel variation is then compensated in the differential detection process. Both theoretical analysis and computer simulations show that significant performance improvement can be achieved using iD4 over the CDD for OFDM receivers in fast fading channels.
URI: http://localhost/handle/Hannan/165927
http://localhost/handle/Hannan/584820
ISSN: 0018-9316
1557-9611
volume: 62
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7182744.pdf971.55 kBAdobe PDFThumbnail
Preview File
Title: A Novel Differential Detection for Differential OFDM Systems With High Mobility
Authors: Liang Zhang;Zhihong Hong;Yiyan Wu;Richard Boudreau;Louis Thibault
subject: OFDM|decision directed|DAB|fast fading|differential detection|Digital audio broadcasting
Year: 2016
Publisher: IEEE
Abstract: In conventional differential detection (CDD), the previous received symbol is used as the phase reference for the current received symbol, therefore the channel variation due to fast fading causes an error floor. We propose a novel iterative decision-directed differential detection (iD4) algorithm for orthogonal frequency division multiplexing (OFDM) systems employing differential PSK modulation in each subcarrier. The core of iD4 is a low complexity time and frequency 2-D estimator which can effectively estimate the channel variation experienced by adjacent time domain symbols. This estimated channel variation is then compensated in the differential detection process. Both theoretical analysis and computer simulations show that significant performance improvement can be achieved using iD4 over the CDD for OFDM receivers in fast fading channels.
URI: http://localhost/handle/Hannan/165927
http://localhost/handle/Hannan/584820
ISSN: 0018-9316
1557-9611
volume: 62
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7182744.pdf971.55 kBAdobe PDFThumbnail
Preview File
Title: A Novel Differential Detection for Differential OFDM Systems With High Mobility
Authors: Liang Zhang;Zhihong Hong;Yiyan Wu;Richard Boudreau;Louis Thibault
subject: OFDM|decision directed|DAB|fast fading|differential detection|Digital audio broadcasting
Year: 2016
Publisher: IEEE
Abstract: In conventional differential detection (CDD), the previous received symbol is used as the phase reference for the current received symbol, therefore the channel variation due to fast fading causes an error floor. We propose a novel iterative decision-directed differential detection (iD4) algorithm for orthogonal frequency division multiplexing (OFDM) systems employing differential PSK modulation in each subcarrier. The core of iD4 is a low complexity time and frequency 2-D estimator which can effectively estimate the channel variation experienced by adjacent time domain symbols. This estimated channel variation is then compensated in the differential detection process. Both theoretical analysis and computer simulations show that significant performance improvement can be achieved using iD4 over the CDD for OFDM receivers in fast fading channels.
URI: http://localhost/handle/Hannan/165927
http://localhost/handle/Hannan/584820
ISSN: 0018-9316
1557-9611
volume: 62
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7182744.pdf971.55 kBAdobe PDFThumbnail
Preview File