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Estimation compensation method and device

A technology of compensation method and compensation device, which is applied in the field of estimation and compensation, and can solve the problems of low data transmission rate and high complexity

Active Publication Date: 2014-12-24
ACER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above solutions, while solving the imbalance effect, are often accompanied by the problem of low data transmission rate or high complexity

Method used

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  • Estimation compensation method and device
  • Estimation compensation method and device
  • Estimation compensation method and device

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0061] u 1 =D 1 ∪D 2 ∪D 3 ∪D 4 ∪D 5

[0062] u 2 =D 6 ∪D 7 ∪D 8 ∪D 9 ∪D 10

[0063] u 3 =D 11 ∪D 12 ∪D 13 ∪D 14 (6)

[0064] Then, the equalization parameter D is:

[0065] D=U 1 ∩U 2 ∩U 3 (7)

[0066] It is worth mentioning that the equalization parameter group in the equalization parameter set does not necessarily need to be as shown in equation (6). The selected equalization parameter set may be repeated with the equalization parameter set selected by other equalization parameter sets, and does not necessarily follow a specific order or rule. When the number of elements in the result set of formula (7) is 1, it is judged that the element is equalization parameter D. If the number of elements in the result set is greater than 1, or it is an empty set, it means that the result has not converged, and the result set can be generated by adding an equalization parameter set or equalization parameter group and re...

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Abstract

The invention provides an estimation compensation method and a device so as to estimate and compensate an imbalance effect between an in-phase path and a quadrature path in a orthogonal frequency division multiplexing (OFDM) communication system; the method comprises the following steps: receiving a frequency field signal and using a plurality of symbols of a plurality of time points in the frequency field so as to generate a plurality of balanced parameter groups, wherein each balanced parameter group comprises a plurality of candidate balanced parameters; obtaining the balanced parameters according to the balanced parameter group; compensating a frequency field signal according to the balanced parameter.

Description

technical field [0001] The present invention relates to a communication method and device, and in particular to a method and device for estimating and compensating the imbalance effect between the in-phase path and the orthogonal path in an OFDM system. Background technique [0002] In a wireless communication system, the IQ imbalance (IQ imbalance) is caused by the phase and gain imbalance between the in-phase path (I path) and the quadrature path (Quadrature path, Q path) at the receiving end. The effect is a common problem when receiving radio frequency (Radio Frequency, RF) signals. However, the above-mentioned IQ imbalance effect will cause image aliasing in Orthogonal Frequency Division Multiplexing (OFDM) communication systems, which will have a direct impact on received signals, especially when receiving When the terminal is a device with relatively low construction cost, such as a detection node (sensor node) in machine-to-machine (M2M) communication, the impact is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/38H04L25/03
Inventor 许腾尹赖炜棋
Owner ACER INC