Virtual array antenna signal generating method based on high-speed mobile communication

A virtual array, antenna signal technology, applied in diversity/multi-antenna system, radio transmission system, space transmit diversity and other directions, can solve the problem of performance degradation of communication system, and achieve the effect of high gain, high anti-interference ability and optimized performance

Inactive Publication Date: 2016-08-17
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that there is a Doppler frequency shift in the existing high-speed mobile communication, thereby degrading the performance of the communication system, and a method for generating a virtual array antenna signal based on high-speed mobile communication is provided

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  • Virtual array antenna signal generating method based on high-speed mobile communication
  • Virtual array antenna signal generating method based on high-speed mobile communication
  • Virtual array antenna signal generating method based on high-speed mobile communication

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Embodiment Construction

[0020] A method for generating virtual array antenna signals based on high-speed mobile communications, such as figure 1 As shown, the specific implementation steps are as follows:

[0021] Step 1. Determine appropriate virtual array antenna signal parameters, assuming N elements of the virtual array antenna, and the phase difference of adjacent element signals is Δψ.

[0022] Step 2, input the sampled original signal to the digital phase-locked loop chip for frequency tracking, and obtain the same component I of the carrier signal containing Doppler frequency shift r (n) and quadrature component Q r (n).

[0023] Step 3, according to the obtained same component I r (n) and quadrature component Q r (n), calculate the instantaneous phase φ(n):

[0024] φ ( n ) = a r c t g Q r ...

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Abstract

The invention discloses a method for generating a virtual array antenna signal based on high-speed mobile communication, which obtains a virtual array antenna with N array elements by phase shifting and uniform phase interval sampling of a single group of I and Q signals received by a single antenna Signals, and then by beamforming the virtual array signals, the communication system can obtain array gain without adding hardware resources, and also compensate for Doppler frequency shift. The invention is beneficial to realize the method of optimizing high-speed mobile communication performance without increasing hardware burden, and has the characteristics of high gain and high anti-interference ability.

Description

technical field [0001] The invention relates to the technical field of high-speed mobile communication, in particular to a method for generating a virtual array antenna signal based on high-speed mobile communication. Background technique [0002] The Doppler frequency shift phenomenon was discovered by Christian Johann Doppler in 1842, which proved that as long as there is a relative movement between the radiation source and the observation, the frequency of the observed signal will change. For wireless communication, the Doppler frequency shift causes an error in the estimation of the carrier frequency, which leads to the performance degradation of the communication system. For example, the Orthogonal Frequency Division Multiplexing (OFDM) system is very sensitive to frequency offset. Doppler frequency shift and Doppler spread are more significant in the high-speed mobile environment. Frequency shift destroys the orthogonality between subcarriers of OFDM system, resulting ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06
CPCH04B7/0408H04B7/0617
Inventor 唐智灵李思敏周相君
Owner GUILIN UNIV OF ELECTRONIC TECH
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