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Anonymous users2024-02-06The signal propagation model in the terrestrial environment is basically subject to the Rayleigh distribution, multipath means that the signal is reflected in the process of propagation due to the influence of the surrounding environment, so that the signal to the destination point is no longer propagated through the same propagation path, there will be other propagation paths, this should be multipath, single-path Rayleigh is not scattered, reflection or something.
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Anonymous users2024-02-05What is the specific role of it? Your question is a strange question, it's just an ideal model, in order to analyze the problem.
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Anonymous users2024-02-04If the channel is regarded as a filter, and h is its unit impulse response, then the convolution can be achieved by using the filter function
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Anonymous users2024-02-03Using the rayleighchan function, a time-varying Rayleigh channel can be generated.
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Anonymous users2024-02-02Hello, is there a solution?
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Anonymous users2024-02-01Frequency domain equalization... It's all changed to the frequency domain to find the reciprocal and multiply it by it.
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Anonymous users2024-01-31Rayleigh fading is a special type of multipath fading.
Rayleigh fading: In the wireless communication channel, due to the multipath propagation of the signal to reach the receiving point, the field strength at the receiving point comes from different propagation paths, and the delay time of each path is different, and the superposition of component waves in each direction produces a standing wave field strength, thus forming a signal fast fading called Rayleigh fading.
Rayleigh fading is a small-scale fading effect, which is always superimposed on large-scale fading effects such as shadows and attenuation.
In the communication system, due to the wide antenna beam of the communication ground station, affected by many factors such as ground objects, landform and sea state, the receiver receives the electromagnetic wave reached by several paths such as refraction, reflection and direct illumination, which is the multipath effect.
The phases of the electromagnetic rays arriving from these different paths are inconsistent and time-variable, resulting in the fading state of the received signal.
The arrival delay of these electromagnetic rays is different, which in turn leads to inter-symbol interference.
If the intensity of the multi-ray is large and the delay difference cannot be ignored, a bit error will occur, which cannot be eliminated by increasing the transmit power, and the fading caused by the multipath effect is called multipath fading.
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Anonymous users2024-01-301. Both single-path Rayleigh channels and multi-path Rayleigh channels belong to Rayleigh declining letter sheds; 2. The Rayleigh fading channel is a statistical model of the radio signal propagation environment. This model assumes that the amplitude of the signal is random, i.e., "fading", and that its envelope obeys the Rayleigh distribution.
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