Wireless wifi coverage Mathematical Modeling 5

Think about it, there is only one answer to this question, I wish you success.

How it feels like a physical problem.

If you solve it by physical means.

g(mm (r+h) 2=m(2 t) 2(r+h) so h=(gmt 2 4 2))-r brings in the relevant data, h=

To construct a mathematical model, the center of the earth is O, the satellite is regarded as the particle B, and the tangent to the Earth is in the triangle AOB, and the cos angle AOB = ao Bo = R (R+H) = so the angle AOB =

Therefore, the central angle of the arc ac to the circle is.

At least the number of satellites is n=360°

i.e. 3 satellites.

1: The altitude of the satellite from the Earth is about 36000 km

2: Generally, the area of TV satellites is specified according to needs

3: 3 capsules. Only 2 poles are not covered...

MATLAB comes with a MIMO channel.

In block simulink, this one can't be short;

Some references such as:

Bottom: snr=0; % defines the signal-to-noise ratio as back.

A: 0hza=10 (snr 10); The unit conversion relation of the signal-to-noise ratio is im=eye(1); Here"1"It is the number of roots with a small number of transmitting antennas and receiving antennas.

sum=0;% initialization sum is 0

for i=1:10000 %program loop 10000 times h=randn(1,4); Generate a Gaussian signal source q=h*h';% Seeking the Saud Matrix.

sum=sum+log2(det(im+a*q/4));The sum of the channel capacity obtained by 10,000 cycles.

endc = sum 10000 % average of 10000 cycles.

Yang Xiaoniu's "Principles and Applications of Software Defined Radio" P85 has a program for transmitters, and PUDN has a receiver and modem**.

Yes, you can change the basic settings in the router to adopt.

Wireless channel.

Ground wave propagation. Ionospheric reflection.

Wireless line-of-sight relay.

Satellite communications. Ultrashort wave and microwave tropospheric scattering.

The simple bai theory is divided into 3 categories.

1 Broadcast du

Channels (Zhibch): Including BCCH (broadcast control channel), FCCH (frequency DAO correction channel) and SCH (synchronous signal inner channel) channels, they carry the information target of all mobile phones in the cell, so they are one-way downlink channels.

2 Common Control Channel (CCCH): Includes RACH (Random Access Channel), PCH (Paging Channel), AGCH (Access Allowed Channel) and CBCH (Cell Broadcast Control Channel), the former is a one-way uplink channel, and the latter is a one-way downlink channel.

3 Dedicated Control Channel (DCCH): including SDCCH (Independent Dedicated Control Channel), SACK (Slow Follower Control Channel), and FACCH (Fast Follower Control Channel).

According to the mode of propagation, there are three types: ground wave, sky wave and line of sight propagation; There are also scattering propagation, including tropospheric scattering, ionospheric scattering, and meteor remnant scattering.

Big brother, sue me if you have an answer