A three-dimensional channel modeling method for high-altitude platform mimo communication system
A high-altitude platform and channel modeling technology, applied in transmission systems, wireless communications, transmission monitoring, etc., can solve problems such as inaccurate description of two-dimensional MIMO channel models, high spatial correlation of wireless channels, and low channel capacity
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specific Embodiment approach 1
[0018] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the three-dimensional channel modeling method of the high-altitude platform MIMO communication system is specifically carried out according to the following steps:
[0019] Step 1, prepare the input delay spread function of link p-1 and link q-m;
[0020] Step 2. Carry out Fourier transform to the input delay spread function of link p-1 prepared in step 1 and the input delay spread function of link q-m to obtain the time-varying transfer function T of link p-1 pl (t,f) and the time-varying transfer function T of the link q-m qm (t,f);
[0021] Step three, the time-varying transfer function T of the link p-l obtained in step two pl (t,f) and the time-varying transfer function T of the link q-m qm On the basis of (t, f), find the time-varying transfer function T of the link p-l pl (t,f) and the time-varying transmission number T of the link q-m qm The space-time-frequency correlation f...
specific Embodiment approach 2
[0023] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the input delay spread function of link p-1 and link q-m is prepared in said step one; The specific process is:
[0024] The general form of the communication channel based on the high-altitude platform is the Rician channel,
[0025] n T root input antennas, at the mobile ground station there are n R Root receiving antennas, all antennas are matched and omnidirectional, 1≤p≤q≤n T , 1≤l≤m≤n R , p is the pth input antenna of the high-altitude platform station, q is the qth input antenna of the high-altitude platform station, l is the lth receiving antenna of the mobile ground station, and m is the mth receiving antenna of the mobile ground station;
[0026] The link between the pth input antenna of the high-altitude platform station and the lth receiving antenna of the mobile ground station is represented by p-l; according to the three-dimensional model, the input delay spr...
specific Embodiment approach 3
[0072] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in the step two, the input delay spread function of the link p-1 prepared in the step one and the input delay spread function of the link q-m are performed Fourier transform to get the time-varying transfer function T of the link p-l pl (t,f) and the time-varying transfer function T of the link q-m qm (t,f); the specific process is:
[0073] Perform Fourier transform on the input delay spread function of link p-l to obtain the time-varying transfer function of link p-l, the expression is as follows:
[0074]
[0075] The components of the LOS and NLOS time-varying transfer functions are:
[0076]
[0077]
[0078] In the formula, is the Fourier transform of the input delay spread function of the link p-l;
[0079] Represents the Fourier transform;
[0080] T pl,LOS (t, f) is the LOS component of the time-varying transfer function of the link p-l; ...
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