An efficient ungerboeck type MAP receiver for multi-user channel with M-Ary quasi orthogonal signaling M-Ary yakla̧sik dikgen sinyalleşme ile çoklu erişim için etkin ungerboeck tipinde MAP alicisi

Date

2013-08-05

Author

Güvensen, Gökhan Muzaffer
Tanık, Yalçın
Yılmaz, Ali Özgür

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In this paper, a high performance MAP receiver with significantly reduced complexity is proposed for multiple-access channel with M-ary quasi orthogonal signaling. The proposed architecture operates on the channel and code matched filters (MF) belonging to each users signaling waveforms. The proposed MAP receiver is based on the factor graph (FG) obtained by using the equivalent channel model, and it operates on forward and backward directions along signaling intervals iteratively. Also, it is substantiated with bidirectional decision feedback (BDF) in order to limit the number of states used by each user. This Ungerboeck type MAP receiver, where Sum-Product Algorithm (SPA) with the support of RSSE, without need for whitening filter shows a very close performance to matched filter bound (MFB) at significantly reduced complexity for multipath channels with large delay spread and number of users.

Subject Keywords

Equalization, MAP, Ungerboeck, Multiple-access channel, SPA, reduced state sequence estimation

URI

https://hdl.handle.net/11511/56746

DOI

https://doi.org/10.1109/siu.2013.6531279

Conference Name

2013 21st Signal Processing and Communications Applications Conference (SIU)

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

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A Reduced-State Ungerboeck Type MAP Receiver with Bidirectional Decision Feedback for M-ary Quasi Orthogonal Signaling Güvensen, Gökhan Muzaffer; Tanık, Yalçın; Yılmaz, Ali Özgür (2014-02-01) In this paper, we propose a generic receiver based on optimum maximum likelihood sequence estimation (MLSE) employing a generalized Ungerboeck metric with significantly reduced complexity for the general class of M-ary quasi orthogonal signaling (MOS) in severe multipath fading channels. First, by using the factor graph (FG) of the obtained generalized Ungerboeck metric for MOS and sum-product algorithm (SPA) framework, a highly efficient reduced state sequence estimation (RSSE) algorithm is proposed that o...
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Citation Formats

G. M. Güvensen, Y. Tanık, and A. Ö. Yılmaz, “An efficient ungerboeck type MAP receiver for multi-user channel with M-Ary quasi orthogonal signaling M-Ary yakla̧sik dikgen sinyalleşme ile çoklu erişim için etkin ungerboeck tipinde MAP alicisi,” presented at the 2013 21st Signal Processing and Communications Applications Conference (SIU), Haspolat, Turkey, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56746.