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Frame signal generating method, signal channel estimating method and corresponding sending and receiving device

A technology of frame signal and channel response, applied in the field of channel estimation method and corresponding sending, receiving device, and frame signal generation method, capable of solving problems such as low complexity and estimation error

Inactive Publication Date: 2008-07-30
ZTE CORP
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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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  • Frame signal generating method, signal channel estimating method and corresponding sending and receiving device
  • Frame signal generating method, signal channel estimating method and corresponding sending and receiving device
  • Frame signal generating method, signal channel estimating method and corresponding sending and receiving device

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Embodiment Construction

[0035] 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.

[0036] 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 invention provides a frame-signal generation method, a channel estimation method and a sending / receiving device. The frame includes at least one sub-frame which comprises one or a plurality of long blocks and one or a plurality of short blocks added with a negacyclic prefix which is a phase-inversion replication of pilot training sequence tails. The signal sending device of the invention for transmitting pilot signals with orthogonal frequency comprises a training sequence generator, a modulation module, a cyclic prefix adding module and a framing module which are connected in turn. The new channel estimation method resolves the shortcoming of original channel estimation method which can only precisely estimate the sub-carrier frequency channel response in odd locations of the long blocks on the premise that the complexity is not increased.

Description

technical field [0001] The present invention relates to the technical field of mobile communication systems, in particular to a frame signal generating method, 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 importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/02H04B1/707
Inventor 张峻峰章贵郑骜扬王亚峰
Owner ZTE CORP
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