Wireless communication method and equipment

Abstract

The invention provides wireless communication equipment which relates to the technology of wireless communication, and comprises a receiving antenna and a signal processing module, wherein the receiving antenna is used for receiving wireless signals transmitted by a plurality of wireless channels, the wireless signals respectively carry a plurality of subcarriers to carry out transmission, the signal processing module comprises a channel estimation unit, a channel information counting unit and a detection unit, wherein the channel estimation unit is used for estimating a frequency response value of each subcarrier, the channel information counting unit is used for counting the channel information of the wireless channels and enables the channel information to respectively generate adjustment factors corresponding to the subcarriers, and the detection unit is used for carrying out selective power adjustment to the frequency response values provided by the channel estimation unit and wireless signals of the subcarriers corresponding to the frequency response values according to adjustment factors estimated by the channel information counting unit, so that the signals after the power adjustment are detected. The invention simultaneously provides a wireless communication method.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular, to a wireless communication method and device based on Orthogonal Frequency Division Multiplexing (OFDM). Background technique [0002] In a wireless communication system, a transmit signal at a transmitter is usually transmitted through multiple transmission paths. Since each path component of the transmitted signal reaches the receiving antenna through different propagation paths, each signal component may have a different time delay, which will cause the energy of the received signal to be expanded in time. [0003] Assuming that the signal sent by the sender is δ(t), the received signal after passing through the multipath channel can be expressed as: where α l is the fading factor of the lth path, τ l is the propagation delay of the lth path. The maximum delay spread τ of the multipath channel max It is usually defined as the interval length from the delay of t...

AI Technical Summary

Problems solved by technology

Since the degree of fading of each subcarrier is actually different, the above compensation is usually not sufficient for some subcarriers with a greater degree of fading, which may cause the data on the above subcarriers to lose effective accuracy and be erroneously detected, thus Causes the overall performance of the wireless communication system to decline

If some sub-carriers with a greater degree of fading are to be given greater compensation, it will inevitably cause most sub-carriers to be saturated during A / D (analog-to-digital) conversion, which will also cause the overall performance of the wireless communication system to decline.

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