Robust spread spectrum type communication with M-ary quasi orthogonal signaling for wireless fading channels M-ary yaklaşik dikgen sinyalleşme ile yayili spektruma sahip sistemler için etkin telsiz haberleşme

2012-07-09
In this paper, a receiver architecture with reduced complexity is proposed for spread spectrum type communication with M-ary quasi orthogonal signaling. The proposed structure comprises of the channel and code matched filtering (MF) concatenated with a reduced state maximum likelihood sequence estimation (MLSE) type processing at symbol rate. MLSE, which takes the interference caused by nonideal cross- and autocorrelations of the spreading codes and multi-path channel into account, is directly applied to the unwhitenedmatched filter outputs. The hypothetical matched filter bound (MFB) is achieved by the proposed structure with the use of a reasonable number of states. By using the proposed reduced state Ungerboeck type MLSE based receiver, it is seen that M-ary quasi orthogonal signaling is an effective spread spectrum type modulation technique for multi-path channels with large delay spread at low power.
2012 20th Signal Processing and Communications Applications Conference (SIU)

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Citation Formats
G. M. Güvensen, Y. Tanık, and A. Ö. Yılmaz, “Robust spread spectrum type communication with M-ary quasi orthogonal signaling for wireless fading channels M-ary yaklaşik dikgen sinyalleşme ile yayili spektruma sahip sistemler için etkin telsiz haberleşme,” presented at the 2012 20th Signal Processing and Communications Applications Conference (SIU), Mugla, Turkey, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57218.