Device and method for channel estimation and channel post-processing
A channel estimation and channel technology, applied in the field of mobile communication, can solve problems such as useful signal path leakage, excessive noise introduction, error deletion, etc., to reduce the impact of noise, improve demodulation performance, and avoid losses
Active Publication Date: 2013-01-16
ZTE CORP
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[0005] In order to solve the problems of leakage of useful signal paths, excessive introduction of noise and erroneous deletion of useful signal paths, it is necessary to provide a channel estimation that reduces the leakage of useful signal paths, the introduction of noise and the reduction of erroneous deletion of useful signal paths and channel post-processing means
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[0034] The device and method for channel estimation and channel post-processing of the present invention will be described below with reference to the accompanying drawings.
[0035] see figure 1 , which is a block diagram of the device for channel estimation and channel post-processing in the present invention.
[0036] The device for channel estimation and channel post-processing is set at the receiver, which includes a discrete cosine transform module 101 , a threshold filter module 102 , a channel post-processing module 103 , an inverse discrete cosine transform module 104 and a conversion module 105 .
[0037] The discrete cosine transform module 101 is used to calculate the channel estimate H of the pilot position on the frequency domain RS (k), and the channel estimation value H of the pilot position on the frequency domain RS (k) Perform discrete cosine transform to obtain the first channel estimate h RS (n).
[0038] The threshold filtering module 102 is used to c...
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The invention discloses a device and a method for channel estimation and channel post-processing. The method for the channel estimation and channel post-processing comprises the following steps of: performing discrete cosine transform and channel post-processing to filter interference and noise on pilot channel estimation values of a frequency domain; transforming to the frequency domain by usingthe discrete cosine transform; and realizing the channel estimation of non-pilot positions for the frequency domain channel estimation values at different time slot pilot positions by using a filtering mode. The noise introduction is reduced, the noise influence is lowered, the leakage of a wanted signal path is effectively reduced simultaneously, and the loss of the receiver performance brought by wrongly deleting the wanted signal path is avoided. Therefore, the demodulation performance of the receiver is improved, and the system capacity is increased.
Description
technical field [0001] The present invention relates to the field of mobile communication, in particular to a device and method for channel estimation and channel post-processing of an Orthogonal Frequency Division Multiplexing (OFDM) system in the mobile communication field. Background technique [0002] The Long Term Evolution (LTE) project is the largest new technology research and development project initiated by the 3rd Generation Partnership Project (3GPP) in the past two years, which improves and enhances the 3rd Generation Digital Communication (3rd Generation , 3G) air access technology. Compared with 3G, LTE has more technical advantages, reflected in higher user data rate, packet transmission, reduced system delay, improved system capacity and coverage, and reduced operating costs. [0003] The LTE downlink uses OFDM technology. OFDM has the characteristics of high spectrum utilization rate and anti-multipath interference, etc. The OFDM system can effectively re...
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IPC IPC(8): H04W52/06H04B7/005
Inventor 李萍马毅华
Owner ZTE CORP