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VLSISP
2002

Modulation and Coding for Noncoherent Communications

11 years 5 months ago
Modulation and Coding for Noncoherent Communications
Until recently, the theory of noncoherent communications was premised on the use of orthogonal multi-pulse modulation such as frequency shift keying. The main drawback of this modulation scheme has been its poor spectral efficiency (rate/bandwidth). This paper considers instead the more general non-orthogonal multi-pulse modulation (NMM) technique. Optimal and suboptimal noncoherent detection strategies for NMM are reviewed and their asymptotic (high SNR) performances are characterized for the additive Gaussian as well as the Rayleigh fading channels. The resulting non-Euclidean distance measures are then used to design NMM signal sets that yield significantly higher bandwidth efficiencies than their orthogonal counterparts. NMM in conjunction with convolutional coding is also studied as a way to improve energy efficiency. Several optimal convolutional codes
Michael L. McCloud, Mahesh K. Varanasi
Added 23 Dec 2010
Updated 23 Dec 2010
Type Journal
Year 2002
Where VLSISP
Authors Michael L. McCloud, Mahesh K. Varanasi
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