Parallel channel equalization method

A channel equalization and channel parameter technology, applied in the field of digital information transmission, can solve problems such as unreasonable use in large quantities, and achieve the effect of reducing processing speed and device clock rate and improving accuracy.

Active Publication Date: 2012-11-14
TSINGHUA UNIV
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Problems solved by technology

[0003] The traditional channel equalization algorithm is proposed for single-channel serial data. When the transmission rate is high, the device needs to run at a very high clock rate. Considering factors such as cost and power consumption, this method is widely used in communication systems. High-speed devices are unreasonable

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[0041] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0042] The present invention can be applied to high-speed wireless communication all-digital receivers. The principle block diagram of the all-digital receiver applied by the method of the embodiment of the present invention is as follows figure 1 as shown, figure 2 is a flow chart of a method in an embodiment of the present invention, image 3 is the frame structure diagram used in this method. Such as image 3 As shown, the frame structure includes a frame header and a frame body. Wherein, the frame header includes a frame header cyclic prefix (frame header CP) and a PN training sequence, and the frame body includes a frame body cyclic prefix (frame body CP) and val...

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Abstract

The invention discloses a parallel channel equalization method which comprises the following steps of: (S1) carrying out parallel frame synchronization processing on input data; (S2) carrying out parallel channel estimation by utilizing a known PN (pseudo-random noise) training sequence and a PN training sequence in data output by the step (S1) to obtain a channel parameter; (S3) respectively storing frame body data in the data output by the step (S1) and the channel parameter obtained by the estimation into a first-in first-out memory, making up 0 for the channel parameter, and then beginning to output the frame body data and the channel parameter at the same time; and (S4) sequentially carrying out a parallel FFT (Fast Fourier Transform Algorithm) operation, a parallel division operation and a parallel IFFT (Inverse Fast Fourier Transform) operation on the frame body data and the channel parameter to obtain output data. The invention can reduce the requirements on the processing speed of the data and the clock rates of devices, is suitable for wireless high-speed data communication systems, can realize the unbiased estimation of the channel parameter and improve the accuracy of an estimated parameter on hardware and is particularly suitable for occasions requiring to utilize only a section of the training sequence to carry out the channel estimation.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a parallel channel equalization method. Background technique [0002] In wireless communication channels, there is usually strong multipath interference, and channel equalization algorithms are required to offset the influence of time-varying multipath channels. There are two types of equalization methods commonly used: time domain equalization and frequency domain equalization. For the time domain equalization algorithm, it is necessary to use a transverse filter; for the frequency domain equalization algorithm, it is necessary to process the data after discrete Fourier transform. To perform frequency domain equalization, channel parameters need to be estimated first. Channel estimation mainly includes data-aided estimation algorithms and blind estimation algorithms. Among them, data-aided algorithms are widely used because of their simple method and hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L25/02
Inventor 张彧万晓峰姜龙潘长勇张国敬邱松
Owner TSINGHUA UNIV
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