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Resource coordination and interference management is the key to achieving thebenefits of femtocell networks. Over-the-air signaling is one of the mosteffective means for distributed dynamic resource coordination and interferencemanagement. However, the design of this type of signal is challenging. In thisletter, we address the challenges and propose an effective solution, referredto as coded single-tone signaling (STS). The proposed coded STS schemepossesses certain highly desirable properties, such as no dedicated resourcerequirement (no overhead), no near-and-far effect, no inter-signal interference(no multi-user interference), low peak-to-average power ratio (deep coverage).In addition, the proposed coded STS can fully exploit frequency diversity andprovides a means for high quality wideband channel estimation. The coded STSdesign is demonstrated through a concrete numerical example. Performance of theproposed coded STS is evaluated through simulations.

Coded Single-Tone Signaling for Resource Coordination and Interference Management in Femtocell Networks