The present document specifies the HiperMAN air interface with the specification layer 1 (physical layer)@ following the ISO-OSI model. HiperMAN is confined only to the radio subsystems consisting of the Physical (PHY) layer and the DLC layer - which are both core network independent - and the core network specific convergence sub-layer. For managing radio resources and connection control@ the Data Link Control (DLC) protocol is applied@ which uses the transmission services of the DLC layer. Convergence layers above the DLC layer handle the inter-working with layers at the top of the radio sub-system. The scope of the present document is as follows: ? It gives a description of the physical layer for HiperMAN systems. ? It specifies the transmission scheme in order to allow interoperability between equipment developed by different manufacturers. This is achieved by describing scrambling@ channel coding@ modulation@ framing@ control mechanisms@ and power control to assist in radio resource management. ? It does cover the receiver and transmitter performance requirements which are specific for HiperMAN systems. ? Some information clauses and annexes describe parameters and system models to assist in preparing conformance@ interoperability@ and coexistence specifications.