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Simplified receiver for receiving code field orthogonal pilot signal and receiving method thereof

A pilot signal and receiver technology, applied in the field of data communication, can solve problems such as co-channel interference and low complexity, and achieve the effect of improving anti-interference performance and complexity performance

Inactive Publication Date: 2008-05-14
ZTE CORP
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  • Abstract
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  • Claims
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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 w

Method used

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  • Simplified receiver for receiving code field orthogonal pilot signal and receiving method thereof
  • Simplified receiver for receiving code field orthogonal pilot signal and receiving method thereof
  • Simplified receiver for receiving code field orthogonal pilot signal and receiving method thereof

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Embodiment Construction

[0046] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0047] Figure 1-A is the block diagram of the code-domain pilot channel estimation system for the single-user system; Figure 1-B It is a block diagram of the code-domain pilot channel estimation system of the multi-user system.

[0048] Such as Figure 1-A and Figure 1-B As shown, the upper part is the transmitter that transmits the pilot signal that is orthogonal to the code domain, and the lower part is the receiver that receives the pilot signal that is orthogonal to the code domain.

[0049] figure 2 It is a block diagram of the subframe structure of the DFT-S OFDM system.

[0050] Such as figure 2As shown, in the DFT-S OFDM system, a complete frame structure includes 20 subframes of 0.5ms, and each subframe is composed of 6 Long Blocks and 2 Short Blocks, where the ShortBlock is used to transmit reference signals, Long Block is u...

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Abstract

The invention discloses a simplified receiver used for receiving a pilot signal of a code domain orthogonality, which includes a receiving antenna, a frame decomposition and removing CP module, and a simplified channel estimation interference elimination module. The frame decomposition module and the removing CP module are used for carrying out a sub-frame decomposition and removing the CP to the time domain signal received by the receiving antenna, obtaining the time domain pilot signal of the code domain orthogonality separated from the sub-frame signal, transmitting the time domain pilot signal to the channel estimation interference module and the simplified channel estimation interference module is use for wiping out a multi-user interference and a multi-path interference, and outputting a user time domain or a frequency domain channel responding. The invention also discloses a simplified channel estimation receiving method of the pilot signal of the code domain orthogonality.

Description

technical field [0001] The present invention relates to a data communication technology, in particular to a simplified receiver for receiving code domain orthogonal pilot signals and a simplified method for receiving code domain orthogonal pilot signals for channel estimation. 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. Adaptive channel equalizer uses channel information to counteract the influence of ISI; diversity technology uses channel estimation to achieve a receiver that best matches the received channel signal; maximum likelihood detection minimizes errors at the receiving end through channel estimation. Another important benefit of channel estimation is that it enables correlated demodulation. Therefore, channel estimation is an essential and important part in any wireless communi...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L27/26H04J13/00H04J11/00
Inventor 张峻峰郁光辉
Owner ZTE CORP
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