Bandwidth splicing method of ISM frequency band

Abstract

The invention relates to a bandwidth splicing method of an ISM frequency band, which comprises the following steps: determining a channel sequence, and performing sorting; initializing a channel, andsending a data packet to a receiving end by a sending end; enabling the receiving end to judge whether the channel is idle or not while receiving the data packet, if the channel is idle, reserving thechannel state information of the data packet, and otherwise, storing the channel state information is in a buffer area; enabling the sending end and the receiving end to be switched to the next channel at the same time according to the channel sequence, and so on; traversing the frequency of the reserved channel state information, checking whether a frequency spectrum vacancy occurs or not, if so, searching the state information of the channel which is subjected to minimum interference and crosses the vacancy frequency spectrum, and reserving the state information; eliminating a part of measurement time errors caused by data packet boundary detection by using a mean value; eliminating errors by using a linear elimination method; eliminating noise; and carrying out bandwidth stitching. According to the invention, CSI error elimination in multiple aspects is considered, bandwidth splicing which is easy to realize and low in cost is provided, and the precision of a bandwidth splicing result is improved.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a bandwidth splicing method of an ISM frequency band. Background technique [0002] Time-of-flight based wireless positioning technology is a research hotspot at present. The wider the bandwidth of the wireless signal, the higher the time resolution and the higher the positioning accuracy. Affected by various environments such as noise, there are large errors in the collected original CSI, and it is a great challenge to eliminate these errors. DeepakVasisht et al. proposed the Chronos system. According to the principle that zero subcarriers do not experience packet detection delay, the average subcarrier index symmetric subcarrier phase is used to eliminate the phase error. This theory is based on the fact that the CSI phase error is linear, but the CSI phase There are also non-linear errors. The Splicer proposed by YaxiongXie et al. uses the principle that the packet detec...

AI Technical Summary

Problems solved by technology

The Splicer proposed by YaxiongXie et al. uses the principle that the packet detection delay obeys the zero-mean Gaussian distribution, and eliminates the phase error by averaging a certain number of CSIs. However, the number of CSIs is difficult to control. If the number is small, the effect of error elimination is not good, and the number is large. high computational latency

These researchers spliced ​​the signals of all available channels, but did not consider that when a channel is very busy, the collected signal error is very large, which seriously affects the final result of bandwidth splicing

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