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Radio channel simulating method and apparatus thereof

A wireless channel and analog device technology, applied in the direction of selection device, radio/inductive link selection arrangement, transmission monitoring, etc., can solve the problems of uncontrollable, large investment, and inability to promote on a large scale, and achieve good versatility.

Inactive Publication Date: 2007-03-21
HUAWEI TECH CO LTD
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Problems solved by technology

Testing in a real environment has the following problems: high cost, requiring the construction of a large number of base stations; low efficiency, requiring sports car testing in a real environment; uncontrollable, the real environment is actually changing all the time
It cannot be promoted on a large scale. For a mobile communication equipment manufacturer, multiple links and multiple teams are required to conduct parallel testing. If multipath fading simulators are used, a lot of financial resources will be invested
[0010] Inconvenient to use
Each multipath fading simulator can simulate multiple channels, but each channel is unidirectional. If both uplink and downlink and receive diversity need to be simulated, a large number of analog channels are required, and a large number of duplexers are required, and the connection is very difficult. complex

Method used

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  • Radio channel simulating method and apparatus thereof
  • Radio channel simulating method and apparatus thereof

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Embodiment Construction

[0026] With the development of digital intermediate frequency, in the current mobile base station, the signal modulation, demodulation, filtering and other processing are all processed in the digital domain. Various logic devices (such as FPGA, etc.) are usually used in the base station to complete signal processing. Therefore, we can conveniently add the function of channel simulation in the base station.

[0027] Since the various processes of the Lever 1 layer of the air interface are mainly completed in the mobile communication base station, the wireless channel simulation device proposed by the present invention directly processes the downlink and uplink channels through the baseband signal according to the signal processing content of the downlink and uplink in the mobile base station. simulation.

[0028] After the downlink signal of the cell is transmitted by the base station, it propagates through the wireless channel and reaches the UE. In addition to receiving the ...

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Abstract

A simulation device of radio channel is prepared as setting said device at side of mobile station for carrying out multipath fading treatment on base band signal in order to simulate uplink and downlink channels as well as for superposing a power constant noise on multipath fading-treated signal when uplink channel is simulated.

Description

technical field [0001] The invention relates to a method and device for wireless channel simulation, in particular to a method and device for channel simulation at the side of a mobile base station. Background technique [0002] The performance of a wireless communication system is mainly constrained by the mobile radio channel, and the characteristics of the radio channel change rapidly with time, which is especially relevant for mobile systems. In a mobile system, at least one of the parties involved in the connection is constantly on the move. The attenuation and impulse response of a wireless channel vary even thousands of times per second over a wide range of phase and amplitude. Variations in the radio channel are caused by many reasons. In the wireless channel, the propagation path from the transmitter to the receiver is very complicated, from simple line-of-sight propagation to encountering various complex ground objects, such as buildings, mountains and trees, etc...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04Q7/34H04B17/391
Inventor 王成毅
Owner HUAWEI TECH CO LTD
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