AGC realization method suitable for wireless sensor network

Abstract

The invention relates to an AGC (automatic gain control) realization method suitable for a wireless sensor network. The whole AGC realization method employs a straight line fitting method and a table look-up method. The AGC realization method employs three segments of adjusting methods: a first segment is roughest adjustment, whether a signal is overloaded or not is determined, an adjusting speed is highest, and adjusting precision is lowest; a second segment is rougher adjustment, the signal is adjusted to a comparatively suitable scope, an adjusting speed is faster, and adjusting precision is higher; a third segment is fine adjustment, an adjusting speed is slow, adjusting precision is high, information is adjusted to be constant basically, only the first segment of adjustment is ended that the second segment of adjustment can be entered into, and only the second segment of adjustment is ended that the third segment of adjustment can be entered into. The method is adapted to application of an orthogonal frequency division multiplexing mode or a direct sequence spread spectrum communication mode under a burst mode communication application environment. The method has the advantages of low resource consumption, a fast adjusting speed and high stability, and is suitable for an application scene of the wireless sensor network.

Description

technical field [0001] The invention relates to an AGC (automatic gain control) realization method suitable for wireless sensor networks. More precisely, the present invention relates to a digital automatic gain control implementation method applied in OFDM (Orthogonal Frequency Division Multiplexing) or DSSS (Direct Sequence Spread Spectrum) communication system. It belongs to the field of wireless sensor network communication. Background technique [0002] With the rapid development of communication technology, embedded computing technology, sensor technology and microsystem technology, researchers proposed Wireless Sensor Network (WSN, Wireless Sensor Network) in the late 1990s. Wireless sensor network is a cutting-edge hot research field involving highly interdisciplinary and highly integrated knowledge. It integrates sensor technology, network technology, wireless communication technology, embedded computing technology, distributed information processing technology, et...

AI Technical Summary

Problems solved by technology

The adjustment speed and stability of the AGC method are double-edged swords. The adjustment speed is fast, and the received signal amplitude can be stabilized in a short period of time, which can reduce the AGC adjustment overhead and improve data utilization. However, the fast adjustment speed will cause large Fluctuations and small noises may cause misadjustment and poor stability

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