MATLAB程序：Hata路径损耗模型

最新推荐文章于 2023-08-08 21:57:46 发布

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#OFDM #Hata路径损耗模型

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本文深入探讨了Hata路径损耗模型，详细介绍了其输入参数包括载波频率、基站与移动站之间的距离、发射器高度、接收器高度及环境类型等，并通过MATLAB函数实现了模型的计算过程。同时，展示了不同环境下路径损耗的变化趋势。

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function PL=PL_Hata(fc,d,htx,hrx,Etype)
% Hata Model
% Input
%       fc    : carrier frequency[Hz]
%       d     : between base station and mobile station[m]
%       htx   : height of transmitter[m]
%       hrx   : height of receiver[m]
%       Etype : Environment Type('urban','suburban','open')
% output
%       PL    : path loss[dB]

%MIMO-OFDM Wireless Communications with MATLAB㈢   Yong Soo Cho, Jaekwon Kim, Won Young Yang and Chung G. Kang
%?2010 John Wiley & Sons (Asia) Pte Ltd

if nargin<5, Etype = 'URBAN'; end
fc=fc/(1e6);
if fc>=150&&fc<=200, C_Rx = 8.29*(log10(1.54*hrx))^2 - 1.1;
 elseif fc>200, C_Rx = 3.2*(log10(11.75*hrx))^2 - 4.97; % Eq. (1.9)
 else   C_Rx = 0.8+(1.1*log10(fc)-0.7)*hrx-1.56*log10(fc); % Eq. (1.8)
end
PL = 69.55 +26.16*log10(fc) -13.82*log10(htx) -C_Rx ...
     +(44.9-6.55*log10(htx))*log10(d/1000);  % Eq. (1.7)
EType = upper(Etype);
if EType(1)=='S',  PL = PL -2*(log10(fc/28))^2 -5.4;  % Eq. (1.10)
  elseif EType(1)=='O' 
    PL=PL+(18.33-4.78*log10(fc))*log10(fc)-40.97; % Eq. (1.11)
end

绘制Hata路径损耗模型

% plot_PL_Hata.m

%MIMO-OFDM Wireless Communications with MATLAB㈢   Yong Soo Cho, Jaekwon Kim, Won Young Yang and Chung G. Kang
%?2010 John Wiley & Sons (Asia) Pte Ltd

clear, clf
fc=1.5e9; htx=30; hrx=2;
distance=[1:2:31].^2; 
y_urban=PL_Hata(fc,distance,htx,hrx,'urban');
y_suburban=PL_Hata(fc,distance,htx,hrx,'suburban');
y_open=PL_Hata(fc,distance,htx,hrx,'open');
semilogx(distance,y_urban,'k-s', distance,y_suburban,'k-o', distance,y_open,'k-^')
grid on, axis([1 1000 40 110]),
title(['Hata PL model, f_c=',num2str(fc/1e6),'MHz'])
xlabel('Distance[m]'), ylabel('Path loss[dB]')
legend('urban','suburban','open area',2)