![]() Higher frequency means lesser wavelength and hence lower beam width, which implies greater directivity. Beam width (measure if directional property) of the antenna is directly proportional to wavelength. i think in C-band if the uplinking frequency. The earth station antenna must direct the beam towards the satellite with as little spill over as possible i.e. if i have the downlink frequecy of some channel ,is it possible to calculate the uplink Frequency of that channel.However for the satellite this will result in higher power consumption, which results in avoidable inefficiency. This will increase the weight and power supply ratings will not make any difference. Higher power requirements involve the use of high power amplifiers with high ratings and heat sinks. For such system, the received signal contains interferences in the space, frequency, and time domain at the same time. At higher frequency attenuation is more hence more power will be required for signal transmission to ensure that it reaches the destination with the required minimum power. This work studies system design methods for the uplink multi-user orthogonal timefrequency space (OTFS) channel which forms a virtual multiple-input multiple-output (MIMO) communication system.Uplink frequency is kept higher than Downlink frequency for the following reasons: So, Uplink frequency is different from downlink frequency. To overcome the above-mention difficulties satellite repeaters must involve some form of frequency translation before power amplification.Frequency band separation allows the same antenna to be used for both receiving and transmitting, simplifying the satellite hardware.Trying to receive and transmit an amplified version of the same uplink waveform at same satellite will cause unwanted feedback or ring around from the downlink antenna back into the receiver. ![]() The satellite transmitter generates a signal that would jam its own receiver if both uplink and downlink shared the same frequency.Uplink frequency is different from downlink frequency for following reason:.The downlink frequency is the frequency which is used for transmission of signals from the satellite to the earth station receiver.The uplink frequency is the frequency which is used for transmission of signals from earth station transmitter to the satellite. Uplink frequencies are higher than the corresponding downlink frequencies in the case of satellite communication.
0 Comments
Leave a Reply. |