Method for eliminating initial oscillation of shock filter response of absk signal

Abstract

The invention discloses a method for eliminating initial oscillation of a shock filtering response of an ABSK signal. The method comprises the steps of step (1), presending a string of modulation signals which are not lower than 500 code element periods, and receiving the modulation signals through signal channels by an ABSK receiver and sending the modulation signals to a shock filter; step (2), storing and recording output states X[n] and Y[n] of the shock filter at the moment after the shock filtering response of the ABSK signal enters a steady state from a continuously oscillated transient state; and step (3), setting initial states X[0] and Y[0] of the shock filter into X[n] and Y[n] obtained in the step (2) before subsequent actual communication, wherein the initial state is predetermined to be the steady state of the shock filter. According to the method for eliminating the initial oscillation of the shock filtering response of the ABSK signal, the transmission efficiency and accuracy rate can be vigorously improved, and the transmitting power is greatly saved; and the method is particularly suitable for small data packet communication systems such as burst communication and power line carrier communication and wireless sensor networks which extremely concerns about power consumption.

Description

technical field [0001] The invention belongs to the field of digital communication and digital signal processing, relates to a digital communication system, in particular to a method for eliminating the initial oscillation of an ABSK signal shock filter response. Background technique [0002] 1. Asymmetric binary phase shift keying [0003] The rapidly growing demand for broadband wireless services puts forward higher and higher requirements for wireless communication, which directly leads to more and more crowded radio frequencies in the air. Compressing the wireless transmission spectrum to the maximum has important practical significance and direct economic benefits. The spectrum utilization rate of a digital communication system can be evaluated by the digital rate (expressed in bps / Hz, but strictly speaking, it should be the information rate or "net" code rate after deducting channel coding) that can be transmitted within a unit frequency band, mainly depends on The fr...

AI Technical Summary

Problems solved by technology

Although it effectively utilizes the peak part with high signal-to-noise ratio in the initial oscillation period (ie image 3 CD segment in), but because the shock filter response in the initial segment (before point "E") has not yet reached the amplitude average value in the steady state (after point "B"), the signal-to-noise ratio at this time is low, and the data transmission Not reliable enough, so the AG segment that lasts about 70 symbol periods is still discarded in the design of the data frame

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