Symbol block construction for frequency domain equalization of multi-h CPM

Abstract

This paper considers the construction of a symbol block to generate a cyclic multi-h continuous phase modulated (CPM) signal so as to permit frequency domain equalization (FDE) at the receiver. Like single-h CPM, the memory inherent in a multi-h CPM waveform requires an intra-fix in each transmitted block. We propose a novel procedure that determines the intra-fix symbols, such that the intra-fix length is minimized. The constraints on the required intra-fix symbols are shown to form a set of Linear Diophantine Equations (LDEs). The proposed procedure is applied to a dual-h CPM scheme.

Iterative data detection and channel estimation for space‐time block coded continuous phase modulation over flat fading channels

“…To keep phase continuity, schemes in [9,10] inserted redundant symbols for CPM signals transmitted over a single antenna. Saleem and Stuber [11] extended the work to multi-h CPM signals. When space-time block coded CPM signals transmitted over multiple antennas are considered, Zhang and Fitz [2] noted the associated difficulty since both orthogonality and phase continuity should be achieved simultaneously.…”