Wireless RF Gain Switching for Packet Detection and False Alarm Control
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately distinguishing between signal and interference due to interference similar to packet preambles, leading to false alarms and reduced sensitivity, which affects packet detection and reception.
Innovation Solution
A gain adjustment method for wireless communication that involves obtaining transceiving parameters from a connection partner, determining an adaptive power gain, and setting the idle power gain of the radio-frequency circuit to this adaptive level for a period, with automatic gain control taking over during packet operations, and reverting to initial power gain if no operations occur within the period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the initial power gain of the radio-frequency circuit is lowered to prevent false alarms, then the false alarm rate is reduced, but the receiver becomes hard to detect normal packets
Solution Approach 1:
The patent applies dynamics by making the power gain adjustable rather than fixed. The radio-frequency circuit operates with different power gain levels depending on the state: a first power gain during packet reception/transmission operations, and a second power gain during idle periods. This dynamic adjustment allows the system to optimize for packet detection during operations and reduce false alarms during idle periods, resolving the contradiction between reliability and measurement precision.
2Measurement precision
If the initial power gain is set high to detect normal packets, then packet detection sensitivity is improved, but the receiver becomes too sensitive to interference
Solution Approach 1:
The patent uses dynamic power gain adjustment to resolve this contradiction. During packet reception operations, the circuit uses a first power gain that provides high sensitivity for detecting normal packets. During idle periods between operations, the circuit switches to a second power gain that is lower, reducing sensitivity to interference and preventing false alarms. This temporal separation of gain levels allows the system to enjoy both high detection sensitivity and low interference sensitivity at different times.
Data Source
AI summary
The present invention discloses a gain adjustment method for wireless communication. This method is carried out by a wireless transceiver, and an embodiment of the method comprises the following steps: obtaining at least one transceiving parameter of a wireless connection partner; determining an adaptive power gain according to the at least one transceiving parameter; having an idle power gain of a radio-frequency circuit of the wireless transceiver be the adaptive power gain for a period of time, or having the idle power gain of the radio-frequency circuit be the adaptive power gain until packet transmission operation or packet reception operation takes place within the period of time; and if none of the packet transmission operation and the packet reception operation takes place within the period of time, having the idle power gain of the radio-frequency circuit be an initial power gain right after the period of time.