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Frequency domain multi-dimensional parameterized model of broadband wireless communication channel and modeling method

A broadband wireless communication and parametric modeling technology, applied in the direction of baseband system components, etc., can solve the problems of increasing data processing steps and complexity

Inactive Publication Date: 2011-03-02
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

This algorithm increases the steps and complexity of data processing, and artificially quantizes the time-domain accuracy of channel parameters

Method used

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  • Frequency domain multi-dimensional parameterized model of broadband wireless communication channel and modeling method
  • Frequency domain multi-dimensional parameterized model of broadband wireless communication channel and modeling method
  • Frequency domain multi-dimensional parameterized model of broadband wireless communication channel and modeling method

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Embodiment 1

[0045] This embodiment provides a wireless communication channel frequency domain modeling method based on measured broadband, see figure 1 , the method can be used to directly process the broadband frequency-domain sampling data output by the measuring instrument, and perform high-precision wireless communication channel multi-dimensional parameter estimation, specifically including the following steps:

[0046] Step 1: Input the transmitted signal frequency domain data X(f) of the wireless communication channel measurement and the received signal frequency domain acquisition data Y(f) of the wireless communication channel measurement, and calculate H(f)=Y(f) / X by matrix division (f) Obtain the real-time frequency-domain impulse response H(f) of the measurement channel, where f is the frequency sampling point within the measurement bandwidth. For example: the frequency-domain data X(f) of the transmitted signal and the frequency-domain acquisition data Y(f) of the received si...

Embodiment 2

[0065] The difference between this embodiment and Embodiment 1 is that seven parameters need to be considered: time delay, complex amplitude, Doppler frequency shift, beam departure elevation angle, beam departure azimuth angle, wave velocity arrival elevation angle, and beam arrival azimuth angle. The following combination figure 1 This embodiment will be further described in detail.

[0066] The specific steps of this embodiment include:

[0067] Step 1': Establish a frequency-domain parameterized model of the measured impulse response of the wireless communication channel according to the requirements.

[0068] According to actual needs, certain parameters are selected to establish a channel impulse response frequency domain parameterized model. In this embodiment, time delay, complex amplitude, Doppler frequency shift, beam departure elevation angle, beam departure azimuth angle, wave velocity arrival elevation angle, and beam arrival azimuth angle are selected to constr...

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Abstract

The invention discloses a frequency domain multi-dimensional parameterized model of a broadband wireless communication channel and a modeling method. The method comprises the following steps: (1) computing and acquiring a real-time frequency domain impulse response of the channel by utilizing transmission signal frequency domain data measured by the wireless communication channel and receiving signal frequency domain acquisition data measured by the wireless communication channel; (2) constructing a channel estimation matching function and a frequency domain parameterized model according to the needed multi-dimensional parameters; (3) searching multiple paths from the real-time frequency domain impulse response of the channel, and initializing multi-dimensional parameters of each of the multiple paths; (4) computing maximum likelihood estimation, and acquiring multi-dimensional parameter values of each of the multiple paths through iterative estimation; and (5) if the multi-dimensional parameter values of each of the multiple paths meet the condition of convergence, stopping the iterative estimation and outputting the finally estimated multi-dimensional parameter values of each ofthe multiple paths, and if the multi-dimensional parameter values of each of the multiple paths do not meet the condition of convergence, returning to the step (4). The invention meets the requirement of high-precision multi-dimensional parameterized modeling of the broadband wireless communication channel, and has the advantages of low realization complexity and high speed of convergence.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a frequency-domain multi-dimensional parameterized model of a broadband wireless communication channel and a modeling method. Background technique [0002] In recent years, the fourth generation mobile communication system is developing towards the technical direction of broadband. The bandwidth of the IMT-Advanced system defined by the International Telecommunication Union (ITU) can reach 100MHz, and can support various wireless scenarios such as urban microcell, urban macrocell, macrocell high-speed mobile, and indoor. At the same time, the international WRC 07-11 conference negotiated abundant spectrum resources for the global development of wireless mobile communication services, laying a good foundation for the formation of a large-scale industry. However, due to the different frequency bands and application scenarios of various air interface physical layers in...

Claims

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Application Information

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IPC IPC(8): H04L25/02
Inventor 王萍李颖哲
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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