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Method for realizing wireless microphone receiver diversity by utilizing noise and diversity system

A wireless microphone and receiver technology, applied in the transmission system, microphone mouth/microphone accessories, electrical components, etc., can solve the problems of radio frequency signal burst noise, demodulation signal switching action lag, etc., to achieve the effect of eliminating action lag

Inactive Publication Date: 2012-11-21
朱成超
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  • Abstract
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AI Technical Summary

Problems solved by technology

As a result, the demodulation signal switching action lags and the burst noise is generated when the RF signal strength drops rapidly.

Method used

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  • Method for realizing wireless microphone receiver diversity by utilizing noise and diversity system
  • Method for realizing wireless microphone receiver diversity by utilizing noise and diversity system

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Embodiment Construction

[0010] The implementation of the method will be described below by comparing the working process of the wireless microphone field strength diversity circuit and the noise diversity circuit.

[0011] See figure 2 , figure 2 Disclosed is a wireless microphone receiver noise diversity system, including the same first receiving unit circuit 211 and second receiving unit circuit 212, the first receiving unit circuit 211 and the second receiving unit circuit 212 respectively receive radio frequency signals in the space , the first receiving unit circuit 211 outputs the first demodulated signal 227 to the first pin of the SPDT switch 226 after processing the radio frequency signal, and the first receiving unit circuit 211 also outputs the first field strength signal 229, the first After the field strength signal 229 is filtered by the first low-pass filter 213 to remove the first high-frequency component, it is input to the first end of the field strength comparator 225; the secon...

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Abstract

The invention relates to a method for realizing wireless microphone receiver diversity by utilizing noise and diversity system. The method includes that a receiving unit circuit processes a radio frequency signal and then outputs a demodulating signal to a single-pole double-throw switch, the receiving unit circuit also outputs a field intensity signal, and the field intensity signal is input to the two ends of a field intensity comparer by virtue of a low pass filter; a high pass filter filters low frequency component from the demodulating signal and remains high frequency noise component, adirect current voltage in direct proportion with the intensity and amplitude of the high frequency noise component is output by virtue of a noise detector, the direct current voltage controls the opening and close of a single-pole single-throw switch, when the intensity of one radio frequency signal rapidly falls and the direct current exceeds the preset threshold value, the single-pole single-throw switch is grounded, and the single-pole double-throw switch is switched to another demodulating signal. The invention can eliminate action lag caused by field intensity diversity circuit and burstnoise produced in rapid falling of radio frequency signal intensity.

Description

technical field [0001] The invention relates to a method for selecting a receiving unit with a stronger radio frequency signal by utilizing the noise component in the signal demodulated by the receiving unit, and a noise diversity system thereof. Background technique [0002] The existing wireless microphone diversity method mainly uses the field strength signals generated by two identical receiving unit circuits to control the audio selection switching circuit, and the demodulated signal of the receiving unit circuit with high field strength signal is input to the post-processing circuit for further processing. The most typical example, as attached figure 1 As shown, it is a receiver circuit with field intensity diversity control. Two identical receiving unit circuits 111 and 112 of the receiver receive the spatial radio frequency signal, and the demodulated signal is output to the audio selection switching circuit 115. Single-pole double-throw switch 117, the receiving u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04R1/08
Inventor 朱成超
Owner 朱成超
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