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Wireless local network channel estimating devices

A channel assessment and wireless local area technology, applied in wireless communication, network topology, data exchange through path configuration, etc., can solve problems such as inability to adjust adaptively, and achieve the effect of avoiding channel assessment errors and saving costs

Inactive Publication Date: 2004-02-04
SILICON INTEGRATED SYSTEMS
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to propose a channel estimator (Channel Estimator) of novel design, be used for solving the above-mentioned deficiency that cannot be adaptively adjusted

Method used

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  • Wireless local network channel estimating devices
  • Wireless local network channel estimating devices
  • Wireless local network channel estimating devices

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Embodiment Construction

[0029] The channel estimator (Channel Estimator) in the wireless local area network communication proposed by the present invention mainly uses a simplified least square recursive (RLS) method and an information reconstruction method in the channel estimator during the period of receiving the packet signal. The method is to perform the adjustment of the channel response in the frequency domain, wherein the adjustment procedure can be flexibly adjusted at any time point between a transmitted signal packet (Transmitted Packet).

[0030] Firstly, an explanation will be made for the circuit block connection composition of the channel estimator of the present invention. see figure 1 , figure 1 It is a schematic diagram of the circuit block connection of the channel estimator 20 installed in a WLAN receiver 2 according to the embodiment of the present invention. entire figure 1 Shown is a WLAN receiver 2 that converts the analog signal into a digital signal through an analog-to-d...

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Abstract

The present invention relates to a channel appraising apparatus used in a wireless local area network. The appraising apparatus carries out the modulation of the channel response in a frequency-region during transmitting a signal package by using a simplified type of a channel pre-appraising controller of recursion of least square (RLS) and by using a data-reconstruction apparatus, and its modulating action is flexible, the adaptability modulation being performed at any time during transmitting a signal package, so that the quick convergence and the best effect of the channal appraisement can be achieved effectively.

Description

technical field [0001] The present invention relates to a channel estimator for wireless local area network (WLAN) communication, especially refers to the operation of adjusting channel estimation adaptively at any time point between a transmission signal packet, and then correcting and compensating the channel effect caused by corresponding data influences. Background technique [0002] Wireless local area network (WLAN) communication is being extensively researched, discussed and applied. In the wireless area communication network (WLAN) technology based on orthogonal frequency division multiple task (OFDM), the channel estimation (Channel Estimation) Work is very important. Currently, channel estimation is mostly performed by using long or short preamble parts (Short and Long Preamble). The general position of the preamble part is set at the head of each transmitted packet (Transmitted Packet). However, after WLAN communication is transmitted for a period of time, the ...

Claims

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Application Information

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IPC IPC(8): H04W84/12H04L12/28H04L29/06H04M3/22H04M3/42H04Q3/00
Inventor 苏晓岚
Owner SILICON INTEGRATED SYSTEMS
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