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Iterative detection method, terminal and storage medium

An iterative detection and terminal technology, applied in radio transmission systems, digital transmission systems, electrical components, etc., can solve problems such as the inability to use single-carrier space modulation systems, loss of frequency domain detection performance, difficulties in demodulation and iterative detection, etc.

Inactive Publication Date: 2019-09-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the multipath channel, the demodulation and iterative detection of the system bring certain difficulties due to channel interference
In recent years, a frequency-domain equalized iterative detection has been proposed for spatially modulated multi-carrier systems with cyclic prefixes, but the performance of this frequency-domain detection is lost in the case of antenna asymmetry
In order to improve the iterative detection method of the space modulation multi-carrier system based on the cyclic prefix, and the system performance achieved, the time-domain hard detection technology of the space modulation multi-carrier system based on the zero prefix (zero prefix) is proposed, but the hard detection technology It is only suitable for asymmetric channels and cannot be used for zero-prefix-based single-carrier spatial modulation systems

Method used

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  • Iterative detection method, terminal and storage medium
  • Iterative detection method, terminal and storage medium
  • Iterative detection method, terminal and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0025] An embodiment of the present invention provides an iterative detection method, Figure 1A It is a schematic flow chart of an iterative detection method in an embodiment of the present invention, such as Figure 1A As shown, the method includes the following steps:

[0026] Step S101, the receiver determines a first received signal according to the spatially modulated transmit signal sent by the transmitter.

[0027] Here, the transmit signal is composed of complex vectors; the first received signal is a signal received by a receiver after the transmit signal is transmitted through a MIMO channel and subjected to spatial modulation.

[0028] Such as Figure 1B As shown, the network architecture of the embodiment of the present invention includes a transmitter 11, a MIMO channel 12 and a receiver 13, wherein the transmitter 11 sends a transmission signal to the MIMO channel 12, and then the MIMO channel 12 transmits the transmission signal to the receiver 13 , and finall...

Embodiment 2

[0059] An embodiment of the present invention provides an iterative detection method, figure 2 It is a schematic flow chart of an iterative detection method in an embodiment of the present invention, such as figure 2 As shown, the method includes the following steps:

[0060] In step S201, the receiver receives the spatially modulated transmission signal sent by the transmitter.

[0061] Here, the step S201, that is, receiving the spatially modulated transmission signal sent by the transmitter, is that in the zero-prefix-based single-carrier spatial modulation system, the receiver determines the first reception signal according to the spatially modulated transmission signal sent by the transmitter. Signal.

[0062] Step S202, the receiver determines the transmitted signal whose bit number is greater than a preset bit number threshold as the first received signal.

[0063] Step S203, the receiver acquires prior log likelihood ratio information of the first received signal,...

Embodiment 3

[0074] An embodiment of the present invention provides an iterative detection method, which is a time-domain iterative detection algorithm suitable for multipath channels in a large-scale antenna single-carrier space modulation system. Assuming that the length of this data frame is K, each data frame is preceded by adding 0 of P-1 length, and the received data can be expressed as:

[0075]

[0076] In formula (1-1), Indicates received signal, represents the channel model, Indicates the transmitted signal, Indicates the noise signal in the channel.

[0077] In formula (1-1), the received signal is at N=N 1 +N 2 At +1 time, using the minimum mean square error (Minimum Mean Square Error, MMSE) to assist Turbo equalization, you can get:

[0078]

[0079] In formula (1-2), Expressed at N=N 1 +N 2 The emission signal at the moment of +1, Expressed at N=N 1 +N 2 The channel noise at time +1, represents a fixed NN r ×(N+P-1)N t dimensional channel matrix. ...

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Abstract

The embodiment of the invention discloses an iteration detection method, a terminal and a storage medium, and the method comprises the steps: determining a first receiving signal according to a transmitting signal which is transmitted by a transmitter and is subjected to spatial modulation; performing soft interference cancellation (SIC) on the first receiving signal to obtain a second receiving signal; performing MMSE iterative detection on the second received signal to obtain a third received signal; acquiring log-likelihood ratio information of the third receiving signal according to the third receiving signal; and recovering the transmitting signal according to the log-likelihood ratio information.

Description

technical field [0001] The invention relates to communication anti-interference technology, in particular to an iterative detection method, a terminal and a storage medium. Background technique [0002] As a novel multi-antenna transmission technology, spatial modulation technology has attracted extensive attention in the industry over the years. The spatial modulation of a single active antenna has been extended to the generalized spatial modulation of multiple active antennas, which further improves the frequency band efficiency. But the current spatial modulation detection mainly focuses on signal detection in flat fading channels. In multipath channel, in order to maintain the sparse radio frequency characteristics of the spatial modulation transmitter, the single carrier spatial modulation system has become an effective transmission technology. Under the multipath channel, the demodulation and iterative detection of the system bring certain difficulties due to channel ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04B7/0413
CPCH04B7/0413H04L1/005
Inventor 陈琼韩亚洁
Owner ZTE CORP