Space-Time Continuous Phase Modulation for Non-Coherent Detection

TitleSpace-Time Continuous Phase Modulation for Non-Coherent Detection
Publication TypeJournal Article
Year of Publication2008
AuthorsSilvester, A. - M., L. Lampe, and R. Schober
JournalWireless Communications, IEEE Transactions on
Pagination1264 -1275
Date Publishedapr.
Keywordsblock codes, continuous phase modulation, diagonal block scheme, diagonal signal matrices, fading channels, linear modulation, non-coherent detection, power- efficient transmission, quasistatic fading channel, receivers, space-time codes, space-time continuous phase modulation

The combination of space-time (ST) coding and continuous-phase modulation (CPM) is attractive for power- efficient transmission over fading channels. In this paper, we propose a diagonal block-based ST-CPM (DBST-CPM) scheme, which in addition to its high power efficiency facilitates noncoherent detection at the receiver. DBST-CPM can be regarded as a non-trivial extension of well-known differential ST modulation (DSTM) with diagonal signal matrices for linear modulation formats. For optimization of the code parameters of DBST-CPM we derive an upper bound on the frame-error rate of DBST-CPM in the quasi-static fading channel (QSFC) and we present an efficient optimization algorithm. Additionally, we derive decision rules for low-complexity non-coherent detection of DBST-CPM in various fading environments. Numerical and simulation results show that (a) the derived upper bound accurately predicts the performance of DBST-CPM in the QSFC, (b) the proposed code optimization yields highly power-efficient designs, and (c) the non-coherent detectors approach the performances of their coherent counterparts for various fading channel models.


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