A Low Complexity Coherent CPM Receiver with Modulation Index Estimation

Malek Messai (1, 2) , Frédéric Guilloud (1, 2) , Karine Amis Cavalec (1, 2)

1 Lab-STICC_TB_CACS_COM
2 SC - Département Signal et Communications

In this paper we address the problem of low-complexity coherent detection of constant phase modulation (CPM) signals. We exploit the per-survivor-process technique to build a reduced-state trellis and apply a Viterbi algorithm with modified metrics. In the case where the modulation index can vary, we propose a maximum-likelihood (ML) estimation of the modulation index and compare the performance of the resulting structure with a non-coherent receiver structure of the state of the art. Simulations on an additive white Gaussian noise (AWGN) channel both for binary and M-ary CPM show the efficiency of the proposed receiver.

Mots clés: Viterbi decoding; Modulation index mismatch; Per-survivor-processing; CPM

Domaines: Traitement du signal et de l'image [eess.SP]

Malek Messai, Frédéric Guilloud, Karine Amis Cavalec. A Low Complexity Coherent CPM Receiver with Modulation Index Estimation. EUSIPCO 2014: 22nd European Signal Processing Conference, Sep 2014, Lisbonne, Portugal. pp.979-983. ⟨hal-01197375⟩