Multi-service system is an enabler to flexibly supportuddiverse communication requirements for the next generationudwireless communications. In such a system, multiple types ofudservices co-exist in one baseband system with each service havingudits optimal frame structure and low out of band emission (OoBE)udwaveforms operating on the service frequency band to reduce theudinter-service-band-interference (ISvcBI). In this article, audframework for multi-service system is established and theudchallenges and possible solutions are studied. The multi-serviceudsystem implementation in both time and frequency domain isuddiscussed. Two representative subband filtered multicarrierud(SFMC) waveforms: filtered orthogonal frequency divisionudmultiplexing (F-OFDM) and universal filtered multi-carrierud(UFMC) are considered in this article. Specifically, the designudmethodology, criteria, orthogonality conditions and prospectiveudapplication scenarios in the context of 5G are discussed. Weudconsider both single-rate (SR) and multi-rate (MR) signaludprocessing methods. Compared with the SR system, the MRudsystem has significantly reduced computational complexity at theudexpense of performance loss due to inter-subband-interferenceud(ISubBI) in MR systems. The ISvcBI and ISubBI in MR systemsudare investigated with proposed low-complexity interferenceudcancelation algorithms to enable the multi-service operation inudlow interference level conditions.
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