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This book constitutes the proceedings of the 9th International Workshop on Multiple Access Communications, MACOM 2016, held in Aalborg, Denmark, in November 2016.
The 10 full papers presented in this volume were carefully reviewed and selected from 12 submissions. They were organized in topical sections named: physical layer aspects; MAC layer aspects; and information theory.

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Physical layer aspects.- An Experimental Study of Advanced Receivers in a Practical Dense Small Cells Network.- Generalized minimum distance decoder in a DHA FH OFDMA employing concatenated coding.- Modemless Multiple Access Communications over Powerlines for DC Microgrid Control.- On the Impact of Precoding Errors on Ultra-Reliable Communications.- MAC layer aspects.- Joint Usage of Dynamic Sensitivity Control and Time Division Multiple Access in Dense 802.11ax Networks.- Generic Energy Evaluation Methodology for Machine Type Communication.- Performance Evaluation of LAA-LTE and WiFi Coexistence in Unlicensed 5GHz Band under Asymmetric Network Deployments using NS3.- Providing Fast Discovery in D2D Communication with Full Duplex Technology.- Information Theory.- A Secrecy and Security Dilemma in OFDM Communications.- An analytical model for perpetual network codes in packet erasure channels.

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