We perform the heterogeneous based path loss simulation using terrain model and point-to-point model where we fix the location of a transmitter at the centre of a map and compute the path loss between the fixed transmitter
with a receiver that is located in every possible location.
With given fixed transmitter
, MMSE filter at the receiver is designed to minimize the MSE of each individual data stream and so thus to maximize the SINR of each data stream.
These are fixed transmitter
and fixed receiver (FT-FR), fixed transmitter
and tunable receiver (FT-TR), tunable transmitter and fixed receiver (TT-FR), and tunable transmitter and tunable receiver (TT-TR).
The mechanism of 3-D SAR with fixed transmitter is discussed in this paper.
The schematic diagram of 3-D SAR with fixed transmitter is illustrated in Figure 3, which consists mainly of a transmitter, receiver, motion platform and synchronous module.
According to the scattering theory, the mechanism of 3-D SAR with fixed transmitter can be explained via two stages:
In free space, the Maxwell equations can be solved as the Stratton-Chu integral equation, which is convenient to analyzing the mechanism of 3-D SAR with fixed transmitter.
The nature of 3-D SAR with fixed transmitter is to recover the electric/magnetic current densities using the measured voltage data.
Within that area, anyone who wanted to install a fixed transmitter
had to demonstrate that their signals would not interfere with astronomers' observations.
The case of two moving receivers locating a fixed transmitter
is shown in Figure 4.
Civilian cell phone networks operate wirelessly, but they are dependent on fixed transmitters, often atop of buildings or high elevations, which receive the transmissions from a cell phone and transmit these to another tower until they reach their intended destination.
Firstly, as the radios build and maintain the network there is no need to move large numbers of fixed transmitters into theatre to established a fixed network in a similar fashion to cell phone communications; this reduces time to establish the network, and the accompanying cost in terms of financial and human capital.