The method includes (i) requesting the Sounding Reference Signal (SRS) and receiving the Sounding Reference Signal (SRS), by a base station, from at least one user device and performing corresponding channel estimation, (ii) scheduling, by the base station, at least one. The method includes (i) requesting the Sounding Reference Signal (SRS) and receiving the Sounding Reference Signal (SRS), by a base station, from at least one user device and performing corresponding channel estimation, (ii) scheduling, by the base station, at least one. Each station is allocated a band to send data and that band is reserved for the particular station for all the time which is as follows: Analog multiplexing is used at earth station in the early stages of communication, this helps in combining large numbers of telephone channels into a single. hone circuits) that looks like a sine wave. The following techniques are used the amplitude (e. Used in a ful, 135, 225, 315 degree at each timing mark. In this case, each ti ing interval carries 2 bits of in use of a sub. There are several capacity allocation types used in satellite communication, including Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Pre-Assigned Multiple Access (PAMA), and Demand Assigned Multiple Access (DAMA). Each of these allocation methods has its own. design objective of early mobile radio systems was to achieve a large coverage area by using a single, high powered transmitter with an antenna mounted on a tall tower. FDMA puts each call on a separate frequency. Between the different used frequency channels is a small amount of bandwidth not used.