A new multiresolution (MR) M-ary differential chaos shift keying (DCSK) modulation scheme is proposed in this paper. It is a promising technique to provide different quality of services (QoS) for transmitted bits within a symbol according to their different bit error rate (BER) requirements based on the principle of non-uniformly spaced constellations. The new system not only is simple, but also provides better anti-multipath fading performance against various spreading factors, which inherits the advantages of the conventional DCSK system. Furthermore, the proposed scheme and its multicarrier version further increase spectral efficiency and use lower energy consumption at the same bandwidth as compared to the conventional DCSK and its multicarrier (MC-DCSK) system. Explicit BER expressions of the new system are derived and analyzed over additive white Gaussian noise (AWGN) as well as multipath Rayleigh fading channels. All simulation results verify the prominent advantages of the new scheme and the accuracy of the new analytical approach. He has been a Distinguished Professor since December 2012. He holds 12 patents in the field of physical layer in digital communications and has published over 100 journal and conference papers. His current research interests are in the area of channel coding, joint source and channel coding, chaos modulation, and their applications to wireless communication and storage systems.Guofa Cai (S'13) received the B.Sc. degree in Communication Engineering

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