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Channel estimation method and corresponding sending and receiving device

A channel response and signal technology, applied in baseband system components, multi-frequency code systems, etc., can solve problems such as low complexity and estimation error, and achieve the effect of accurate channel estimation results

Inactive Publication Date: 2011-11-30
ZTE CORP
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  • Application Information

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Problems solved by technology

[0004] There are two main problems in the design of channel estimation: one is the selection of pilot information, due to the time-varying nature of the wireless channel, the receiver needs to track the channel continuously, so The pilot signal must also be continuously transmitted; the second is the design of a channel estimator with low complexity and good pilot tracking ability
The above-mentioned methods will introduce some estimation errors, and this effect is more serious when the frequency selectivity of the channel is large

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  • Channel estimation method and corresponding sending and receiving device
  • Channel estimation method and corresponding sending and receiving device
  • Channel estimation method and corresponding sending and receiving device

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Embodiment Construction

[0034] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0035] figure 1 It is a schematic diagram of a transmitting device and a receiving device in a preferred embodiment of the present invention, such as figure 1 As shown on the left side of , the left half represents a transmitting device, which includes: a pilot training sequence generator 11 , a DFT-S OFDM modulation module 12 , a CP adding module 13 , a framing module 14 and a transmitting antenna 15 . In this embodiment, the pilot training sequence generator 11 generates the frequency domain pilot training sequence, and a complete frame structure in the DFT-SOFDM modulation module 12 includes, for example, 20 subframes of 0.5ms, and each subframe consists of 6 The short block is composed of two long blocks and two short blocks, wherein the short block is used to transmit reference signals, a...

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Abstract

The present invention provides a method for generating a frame signal, a method for estimating a channel, and a sending and receiving device. The frame includes at least one subframe, and each subframe includes one or more long blocks and one or more short blocks. In the A negative cyclic prefix is ​​added to the short block, and the negative cyclic prefix is ​​an inverted copy of the tail of the pilot training sequence. The signal sending device provided by the present invention is used for sending orthogonal pilot signals in the frequency domain, and includes a sequentially connected training sequence generator; a modulation module; a cyclic prefix adding module; and a framing module. The invention adopts a new channel estimation method, and solves the defect that the original channel estimation method can only accurately estimate the frequency domain channel response of odd-numbered subcarriers in a long block without increasing the complexity.

Description

technical field [0001] The present invention relates to the technical field of mobile communication systems, in particular to a channel estimation method and corresponding sending and receiving devices. Background technique [0002] In wireless communication, the acquisition of channel information is very important, almost all practical wireless communication systems use some form of channel estimation technology without exception. The adaptive channel equalizer uses channel information to resist the influence of intersymbol interference (Inter Symbol Interference, hereinafter referred to as ISI); diversity technology uses channel estimation to achieve the receiver that best matches the received channel signal; maximum likelihood detection through channel Estimation minimizes receiver error. Another important benefit of channel estimation is that it enables correlated demodulation. Therefore, channel estimation is an essential and important part in any wireless communicati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02
Inventor 张峻峰章贵郑骜扬王亚峰
Owner ZTE CORP