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Measuring method of received signal strength indicator (RSSI), measuring device of RSSI and receiver

A measurement method and receiver front-end technology, applied in the field of communication, can solve problems such as inaccurate RSSI measurement, and achieve the effect of solving inaccurate RSSI measurement

Inactive Publication Date: 2012-12-12
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problem that the existing RSSI measurement scheme is inaccurate for RSSI measurement, especially for RSSI measurement under small signals, the present invention provides an RSSI measurement method, an RSSI measurement device, and a receiver

Method used

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  • Measuring method of received signal strength indicator (RSSI), measuring device of RSSI and receiver
  • Measuring method of received signal strength indicator (RSSI), measuring device of RSSI and receiver
  • Measuring method of received signal strength indicator (RSSI), measuring device of RSSI and receiver

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Embodiment approach

[0043] According to an implementation manner, the first calculation unit 130 is configured to: convert the digital domain RSSI and the channel noise power into linear values; calculate the difference between the converted linear values; convert the calculated The difference is converted into a dB value as the digital domain power dB value of the received signal.

[0044] Wherein the second measurement unit 120 is used to measure the channel noise power of the front end of the receiver without an input signal.

[0045] Preferably, the processing gain of the front end of the receiver includes amplification and filtering gain and / or digital sampling gain.

[0046] Preferably, the device further includes: a frequency offset tracking unit 150, configured to perform frequency offset tracking according to changes in RSSI at the front end of the receiver.

[0047] The present invention also provides a receiver, which includes the RSSI measuring device.

[0048] Therefore, the method...

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Abstract

The invention provides a measuring method of a received signal strength indicator (RSSI), a measuring device of the RSSI, and a receiver. The method comprises the following steps: a digital domain RSSI output at the front end of the receiver is measured; an access noise power at the front end of the receiver is measured; a digital domain power dB value of an obtained receiving signal is calculated according to the digital domain RSSI and the access noise power; the differential value of the digital domain power dB value of the receiving signal and a processing gain at the front end of the receiver is calculated, so that the RSSI at the front end of the receiver is obtained. When the RSSI is calculated, the influence of the access noise is removed, so that the relatively accurate RSSI can be obtained; and the problem of the inexact RSSI measurement of the existing measurement solution under a small signal is solved.

Description

technical field [0001] The invention relates to the communication field, in particular to an RSSI measurement method, an RSSI measurement device and a receiver. Background technique [0002] In a wireless communication system, it is usually necessary to measure Received Signal Strength Indication (RSSI). For example, when a wireless communication system scans frequency points, it usually determines whether there is an effective frequency point based on RSSI measurement. At present, there is an RF receiving part in most receivers, so the thermal noise generated by the RF device and the circuit board level will make the RSSI measurement, especially the RSSI measurement in the small signal scenario, inaccurate. The small signal here refers to the signal with a small RSSI . [0003] figure 1 is an exemplary structural block diagram of a receiver front end in a wireless communication system, such as figure 1 As shown, the front end of the receiver may include an antenna, a rad...

Claims

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Application Information

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IPC IPC(8): H04B17/00
CPCH04B17/00H04B17/0057H04B17/318
Inventor 吴更石李峰宗凯林森凌
Owner HUAWEI TECH CO LTD
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