Method and device for measuring single-tone field strength

Abstract

The invention provides a method for measuring single-tone field strength. The method comprises the following steps of: converting radio frequency single-tone signals into channel I and channel Q analog baseband signals; converting the channel I and channel Q analog baseband signals into channel I and channel Q digital baseband signals; performing secondary down-conversion on the channel I and channel Q digital baseband signals to acquire single-tone baseband signals, wherein image frequency interfering suppression is performed on a numeric field in the process of the secondary down-conversion; performing fast fourier transform spectral peak searching on the single-tone baseband signals; and performing power spectrum integral on a spectral peak to acquire the field strength of the radio frequency single-tone signals. The invention also provides a device for measuring the single-tone field strength. The method and the device have the advantages of low power consumption, small volume and low cost.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a method and device for measuring single sound field strength. Background technique [0002] In the preliminary planning of the wireless network, the vehicle-mounted monophonic transmitter is often used to simulate the mobile phone for transmission, and the monophonic field strength measuring receiver is used to simulate the reception of the base station to obtain the path loss of each wireless channel. Single-sound field strength measurement receivers are commonly used in wireless network planning for path loss measurement. According to the actual situation, the single-sound field strength measurement receiver must have the following characteristics: [0003] 1. Due to the pre-planning, the location of the base station needs to be estimated, and the site of the simulated network deployment often lacks a complete receiver installation environment, so the single-sound field stre...

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Problems solved by technology

[0004] 2. The installation environment of the single-sound field strength receiver needs to be estimated. It cannot be powered by AC power, and it needs to be powered by batteries. After a simulated network deployment, multiple observations are required. During the observation process, the single-sound field strength measurement receiver cannot be removed and charged frequently. , need to stand by for a long time, which requires low power consumption

[0008] 1. The circuit is bulky and difficult to integrate

A band-pass image rejection filter must be added to the receiver, resulting in a complex circuit, and the filter changes with the frequency of the working signal, has no versatility, and is not easy to integrate; The processing chip (FPGA or DSP) has high requirements, requiring a large number of ADC sampling bits and a high sampling speed, requiring a faster processing speed of the digital processing chip, resulting in a large volume of the ADC and digital processing chip

[0009] 2. High power consumption

The high sampling speed and processing capability of ADC and digital processing chip will inevitably lead to high power consumption of the device

[0010] 3. High cost

High-performance ADC and digital processing chips will inevitably bring high costs

[0011] To sum up, in the prior art, the superheterodyne secondary down-conversion receiver is used to measure the single-sound field strength. Although the sensitivity is high, it is bulky and consumes a lot of power, which is difficult to meet the actual needs of the wireless network pre-planning.

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