scope:

The present document describes the TDMA access method used in Point-to-Multipoin (P-MP) Radio Relay Systems. (P-MP) Radio Relay Systems may use different access methods. As some technical parameters are different for the various access methods, the standard is divided in four parts.

A basic description of the different access methods and a comparison among them is provided in TR 101 274 [2].

The present document (Time Division Multiple Access Methods, TDMA) is to be used in conjunction with EN 301 213-1 [1], describing the basic parameters common to all access methods.

The present document is related to characteristics of system operating with transmitters delivering to antenna port one single carrier; multicarrier systems (where more than one carrier is passed through the same final power amplifier or active antenna are considered in EN 301 213-5 [4]).

The present document specifies the minimum requirements for system parameters of Time Division Multiple Access (TDMA) Point-to-Multipoint (P-MP) Radio Systems in the terrestrial fixed services operating in the band 24,5 GHz to 29,5 GHz (see ERC/REC T/R 13-02 [3]). Only sections specific to TDMA are described in respect to the paragraphs stated in EN 301 213-1 [1].

Time Division Multiple Access (TDMA) is an alternative to FDMA and CDMA covered in other parts of the present document. In TDMA Point-to-Multipoint (P-MP) systems, a central station broadcasts information to terminal stations in a continuous Time Division Multiplex (TDM) or in a burst TDMA mode. The Terminal stations transmit in TDMA mode. The users may have access to the spectrum by sharing it through time multiplexing.