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The explosion of the telecommunications market requires miniaturization and cost-effective realization of the front-ends of transceivers for digital telecommunications. New architectures must therefore be simulated at high level. Current methodologies and corresponding tools suffer from common drawbacks, such as lower accuracy, slow simulation speed, etc. A new methodology has been developed for the efficient simulation, at the architectural level, of mixed-signal front-ends of digital telecom transceivers. The efficient execution is obtained using a multi-rate, multi-carrier signal representation together with a dataflow simulation scheme that switches dynamically to the most efficient signal processing technique available. An implementation of this methodology shows both excellent runtimes and a high accuracy for realistic front-end architectures.